Mountain bike groupsets: everything you need to know

Shimano and SRAM — the complete hierarchy explained

Welcome to BikeRadar's buyer's guide to mountain bike groupsets. A group, gruppo or groupset are all ways of describing the collection of parts that make up a bicycle's drivetrain. The components of a group include the shifters, crankset, bottom bracket front and rear derailleurs, chain, and cassette.

Brakes are sometimes included in component series, but for this article, we're going to stick to the items that comprise the drivetrain. 

This article was last updated on 26 May 2017

Just like our buyer's guide to road bike groupsets, this guide is designed to explain the components of a groupset and the different options offered by the two main manufacturers: Shimano and SRAM.

It is more common to see complete groups on road bikes. When it comes to mountain bikes, however, brands usually mix and match parts from various groups — and in some cases different brands — to suit the bike's intended use and meet a specific price point. 

Components of a groupset

Crankset

Shimano offers its XT group in versions with one, two and three chainrings
Shimano offers its XT group in versions with one, two and three chainrings

Mountain bike cranksets can be divided into three categories by their number of chainrings.

Triple

The first is the triple – the old classic.

As the name implies, it consists of three chainrings, the largest often being a 42- or 44-tooth outer ring.

The middle ring is usually a 32 or 34 and the smallest, inside ring, is often a 22- or 24-tooth.

This setup offers the largest range of gears, but there is significant redundancy in terms of gear ratios. Cross-chaining is also a concern with a triple.

While Shimano still offers high-end triples, cranksets with three chainrings are rarely found on modern high-end mountain bikes. They are disappearing from the entry-level market as well.

Double

Double cranksets supplanted the triple as the mountain bike crankset of choice several years ago. Double cranksets offer a narrower gear range with less overlap than a triple.

They use a smaller inner ring (22- to 28-tooth), while the larger outside cog offers a gear that’s generally well-suited to faster riding (34- to 36-tooth). Double cranksets are found from entry-level bikes through to high-end models.

Single

The most significant trend in mountain bike drivetrains over the past five years has been the movement towards wide range drivetrains with a single chainring. 

Commonly referred to as a "1x", this arrangement has been popular on downhill mountain bikes for years, where large gear ranges aren’t needed and chain security (that is, no dropped chains) is very important.

Following SRAM's launch of XX1 and the introduction of subsequent wide-range 1x11 and 1x12 groups, the single-ring drivetrain is becoming the norm on high- to mid-level mountain bikes.

Chainring size ranges widely, depending on the intended use, from 38-tooth chainrings for strong cross-country racers down to 28- and even 26-tooth chainrings on some fatbikes. Most bikes with 1x drivetrains come with 32- or 30-tooth chainrings. 

One key attribute of 1x drivetrains is the use of a chainring with taller teeth with alternating widths that match up with the plate narrower, and wider links of a chain. Both of these features are designed to keep the chain in place without the aid of a front derailleur or chainguide. 

SRAM is pushing for 1x drivetrains to become the norm for mountain biking
SRAM is pushing for 1x drivetrains to become the norm for mountain biking

By removing the front derailleur and corresponding shifter, a single-ring drivetrain is less complex as well as lighter. Many novice riders find 1x drivetrains easier to operate as well. 

Bottom bracket

Different frames use different bottom bracket systems, including threaded (left) and press-fit (right)
Different frames use different bottom bracket systems, including threaded (left) and press-fit (right)

A crankset won't get you very far without bearings to spin on. These bearings are pressed or threaded into the mountain bike's bottom bracket shell.

Bottom brackets are available in a staggering array of configurations — you might find our complete guide to bottom brackets useful.

Cassettes

Shimano's widest range 11-speed cassette offers an 11-46t spread, while SRAM offers a 12-speed group with a 10-50t range
Shimano's widest range 11-speed cassette offers an 11-46t spread, while SRAM offers a 12-speed group with a 10-50t range

Cassettes come in a wide range of sizes and speeds. Like the crankset, cassette choice is often determined by the bike’s intended riding style and price.

Mountain bike cassettes can be found in 7- through 12-speed versions. They are often referred to by the smallest and largest cogs to provide an indication of the total range, e.g. 11-32 or 10-50t.

Aside from downhill bikes, which often use very narrow-range cassettes, most mountain bikes favor a cassette with a wide spread of gears to make climbing easier. The most commonly found ranges on bikes with double or triple cranksets are 11- to 32-tooth, 34- or 36-tooth.

Single-ring drivetrains go much wider, with SRAM's XX1 and X01 Eagle 12-speed drivetrains providing a 10-50t spread, while Shimano offers an 11-46t range on its 1x11 SLX and XT groups. 

Chains

Higher-end chains often feature hollow links or pins to save weight over more affordable versions
Higher-end chains often feature hollow links or pins to save weight over more affordable versions

The groupset brand and number of gears dictate the type of chain you need. In general, as the number of gears increases, the spacing between the cogs shrinks and so the chain becomes narrower as well.

Because of this, you should only run a chain designed specifically for the number of cogs on your cassette — i.e., don't use a 9-speed chain on a 10-speed drivetrain, or an 11-speed chain on a 12-speed drivetrain. 

The more expensive chains often have smoother, more durable and corrosion-resistant coatings and save weight with hollow links and pins. With that in mind, chains are the first part of a drivetrain to wear out, so it's often best to invest in a mid-level chain. 

Derailleurs

Derailleurs are the components that move the chain between cogs on the cassette and chainrings on the crankset. Each brand offers its own design, but the principle is generally the same.

When pressed, the shifter pulls or releases a cable, which moves the derailleur, derailing the chain and repositioning it in a different gear. 

Front derailleurs move the chain between the chainrings
Front derailleurs move the chain between the chainrings

Rear derailleurs move the chain between cogs on the cassette
Rear derailleurs move the chain between cogs on the cassette

Cables are no longer the only way to control derailleurs. Shimano now offers electronically-actuated derailleurs on XTR Di2 as well as XT Di2. Both these groups use wires to send electronic signals from the shifters to the derailleurs to shift gears.

Shifters

As previously mentioned, shift levers are used to operate a bicycle's derailleurs. Shimano and SRAM use different designs, and while they all shift gears, they each have a particular way of doing it.

Current shifter types: left is Shimano's RapidFire trigger system, in the middle is SRAM's trigger shifter, and on the right is SRAM's Grip Shift
Current shifter types: left is Shimano's RapidFire trigger system, in the middle is SRAM's trigger shifter, and on the right is SRAM's Grip Shift

While mechanically different, both SRAM and Shimano offer 'trigger shifters'. This name is a bit misleading, as both companies have refined the lever ergonomics to shift both levers with the thumb, rather than also relying on the rider's trigger finger.

The benefit of this approach is that it allows a rider to shift while also braking. 

SRAM offers two systems, Trigger and Grip Shift. The trigger system is much more common. Grip Shift functions like a throttle, twisting back and forth to shift. This system has lost popularity in recent years, but still holds a loyal following in cross-country racing since the system is very light and allows riders to shift across the cassette quickly. 

Shimano's Di2 electronic shifters also throw a spanner into the mix as technically they're electronic switches, rather than a mechanical component. This means Di2 levers can be customized and programmed to behave in ways that aren't possible with conventional shifters.

A great example is Shimano's Synchroshift technology, which emulates an intriguing mechanical system of old by controlling a two derailleur setup with just one synchronized shifter.

Choosing an MTB groupset: price versus performance

Like most components, groupsets vary in price a great deal. So what benefits do more expensive groupsets bring?

Weight 

Keith Bontrager famously said of bicycle parts: "Strong. Light. Cheap. Pick two."

A lighter bike will always accelerate, climb and brake better than a heavier one, but without sacrificing strength, something has to give. Whether you're looking at mountain bike drivetrains, wheels or even complete bikes, reduced weight is often the major factor in increased cost.

Generally, with mountain bike groups, the more you spend, the lighter they get. Often the performance of the groupset plateaus at the tier from the top, with reduced weight being the reason for the extra expense.

For example, the difference between Shimano's top two tiers, XT and XTR, is around 230g (excluding brakes and bottom bracket), while the difference between SRAM's flagship XX1 Eagle and second-tier X01 Eagle drivetrains is closer to 46g (excluding brakes and bottom bracket).

These weight differences are the result of more expensive materials and refined, or more time-consuming, manufacturing processes.

In addition to further machining, hole-drilling and high precision, more expensive components often use materials such as carbon fiber, titanium, lightweight aluminum and ceramic bearings to achieve class-leading low weights.

Durability

If you're spending more money on a mountain bike group, you'd expect it to outlast a cheaper option.

Durability does improve with price, but our experience is that durability also plateaus at the second-tier options. XT in the case of Shimano and XO1 in the case of SRAM.

In some cases, component durability can actually decline at the most expensive option, where absolute weight savings sometimes trump product longevity. 

The more expensive technical components are built with greater precision, refinement and materials that lend themselves to greater longevity. This is apparent in derailleurs and shifters, where the cheaper options will develop play and slop overtime, whereas better parts often remain like new for many years of use. 

Wear items, such as cassettes and chainrings, however, are often the reverse of this. Cheaper options are made of heavier, but more durable steels, while the more expensive versions are made with lighter, but softer, aluminum and titanium metals.

Performance

In addition to the benefits of reduced weight, more expensive MTB groupsets find other ways of increasing performance.

Most noticeably, higher priced options provide a smoother, more precise and quicker shift between gears.

This includes reduced effort at the lever, something that becomes apparent once you've been on the bike for a few hours. It's an area where electronic gears are going to set a new benchmark; ultimate precision and speed at the simple push of a button.

Another performance example is increased crankset stiffness to provide crisper shifting and more efficient power transfer from the pedals to the rear wheel. This is achieved with more complex designs and materials that increase strength and stiffness without adding weight. 

Additional features

Besides offering extra gears, it's common for the more expensive groups to offer additional features.

Clutch-equipped rear derailleurs, such as Shadow Plus from Shimano or Type-2 from SRAM are an example of a technology that is offered on these company's mid- and high-end groups.

The clutch keeps the chain taut, which improves shifting over rough terrain, keeping the drivetrain quieter, and reduces the likelihood of dropping a chain. 

Both Shimano and SRAM offer clutch-style rear derailleurs, these greatly reduce chain slap noise and the risk of dropped chains through rough terrain
Both Shimano and SRAM offer clutch-style rear derailleurs, these greatly reduce chain slap noise and the risk of dropped chains through rough terrain

In reverse of this, gear indicators are a feature often lost as the groupset price increases. The theory being that more experienced riders use gears based on ‘feel’ and don’t need numbers or indicators to help them.

Discipline-focused options

With mountain biking spanning so many individual disciplines, it shouldn’t be too surprising to find that what works perfectly for climbing steep hills in cross-country may not be ideal for descending cliff faces in downhill.

This is why discipline-specific groupsets now exist for the more extreme riding styles. We’ll cover these below in the individual brand hierarchies.

Shimano's mountain bike groupsets

Japanese manufacturer Shimano offers the widest range of groupsets for mountain biking. 

Tourney

Tourney is the most basic level of Shimano's components
Tourney is the most basic level of Shimano's components

The range starts with Tourney, which is usually found on department stores bikes.

While it's included in the mountain bike groupsets, we don’t consider Tourney to be off-road worthy.

Tourney is available in 6-, 7- and 8-speed systems combined with a triple crankset. 

Altus M2000

Altus is the group you're likely to find on entry-level mountain bikes
Altus is the group you're likely to find on entry-level mountain bikes

Next is Altus, this the group you're likely to find on entry-level mountain bikes. 

The latest version of Altus offers a 9-speed cassette with a triple crankset with 40/30/22t chainrings.

The Altus rear derailleur doesn't use Shimano's Shadow Plus clutch technology for chain stability, but it does use the Shadow design, which refers to a lower-profile to reduce the likelihood of damage from obstacles on the trail.  

Acera M3000

Acera M3000 is the first of Shimano's groups to offer a double crankset
Acera M3000 is the first of Shimano's groups to offer a double crankset

Acera follows next. This group starts to introduce corrosion-resistant materials such as stainless steel on certain components.

It is a 9-speed group that can be used with a 40/30/22 triple crankset or a 36/22 double crankset. It offers a wider range 11-36 cassette. 

Alivio M4000

Shimano Alivio received a total revamp in 2015. The 9-speed groupset offers hydraulic disc brakes, multiple gearing options and a lighter and more durable crank design
Shimano Alivio received a total revamp in 2015. The 9-speed groupset offers hydraulic disc brakes, multiple gearing options and a lighter and more durable crank design

Shimano Alivio sits just above Acera. Like Acera, this 9-speed group is available with a triple or double crankset. We consider Alivio Shimano’s starting point if you’re seeking a trail-worthy mountain bike. 

It's the first of Shimano's mountain groups to use a two-piece crankset with an external bottom bracket for increased stiffness — Acera uses an Octalink bottom bracket, while Altus and Tourney rely on square-taper bottom brackets. 

Deore M6000

Shimano Deore is a 10-speed group that shares many of the features of the company's higher-end 11-speed groups
Shimano Deore is a 10-speed group that shares many of the features of the company's higher-end 11-speed groups

Deore is widely considered to be the Japanese company's first performance-ready mountain bike groupset. It's a 10-speed group that shares many of the technologies found on Shimano's higher-end 11-speed groups. The 10-speed cassette is offered in a wide-range 11-42t version. 

Deore is offered with double and triple crankset options. It's also the first group to use Shimano's Shadow Plus clutch-equipped rear derailleur. 

SLX M7000

SLX is the entry into 11-speed and 1x11 drivetrains
SLX is the entry into 11-speed and 1x11 drivetrains

SLX is a very important group in the Shimano hierarchy. This is the first group to share the same number of speeds as XT and XTR in a more budget-friendly package. Generally speaking, SLX offers the same features and function as the upper-end groups at a higher weight and marginally lower shift quality.

Standout features include an 11-speed cassette offered in 11-40 and 11-42t cassettes for use with the SLX double crankset. SLX is also the first Shimano group to offer a 1x drivetrain with an 11-46t cassette. 

There is no triple version of the SLX crankset.

Zee M640

Zee is Shimano's entry-level group for downhill and freeride
Zee is Shimano's entry-level group for downhill and freeride

The first of the discipline-specific groups, Zee, is Shimano’s entry-level gravity groupset. It's a more affordable version of Saint (see below).

Available only with a 1x crankset, Zee is designed for downhill and freeride. It’s built heavier (and sturdier) than the similarly-priced SLX group.

Unlike SLX, Zee is a 10-speed group.

Saint M820

Saint is Shimano's top-level downhill focused groupset. Built with professional downhill racing and extreme freeride in mind
Saint is Shimano's top-level downhill focused groupset. Built with professional downhill racing and extreme freeride in mind

Saint is positioned as a top-level option for those who race downhill.

Saint, like Zee, is a gravity-focused 1x10 group built to handle the abuse of freeride and downhill. 

Deore XT M8000

Deore XT is the workhorse of Shimano's mountain bike groups
Deore XT is the workhorse of Shimano's mountain bike groups

Shimano Deore XT sits one rung below the professional-grade XTR group. This 11-speed group has nearly all the top-end design features as XTR and offers all the performance most riders will ever need, but with a slight weight penalty. 

XT is available with either single, double and triple-ring cranksets. Like SLX, Deore XT is available with a wide range 11-46t cassette for 1x drivetrains. 

XTR M9000

XTR is the pinnacle of Shimano's range and is often used for racing purposes. And since last year it has offered 11-speed gearing with either single-, double- or triple-crankset configurations.

XTR combines top-end design with lightweight materials such as high-grade alloys, carbon fiber and titanium. It’s common for XTR to offer features that no other groupset level receives, such as multi-shift release when downshifting.

XTR is split into two separate groupset offerings: Race and Trail; with the brakes, rear derailleur and crankset options being the difference.

Race is all about absolute weight savings, where features such as tool-free brake lever adjust and Ice-Tech brake cooling fins are removed in favour of saved grams.

Trail is the more ‘everyday’ and feature-packed option, where a few additional grams get you greater brake power, adjustability and even chain retention.

XTR Trail adds on a few features and a little weight. The biggest difference is in the brakes, where XTR Trail brakes offer tool-free lever reach adjust, great braking power and better heat management
XTR Trail adds on a few features and a little weight. The biggest difference is in the brakes, where XTR Trail brakes offer tool-free lever reach adjust, great braking power and better heat management

XTR Race is Shimano's lightest mountain groupset. If you're serious about cross-country racing, this is the pick from Shimano
XTR Race is Shimano's lightest mountain groupset. If you're serious about cross-country racing, this is the pick from Shimano

Deore XT and XTR Di2

Shimano XTR Di2 was introduced in 2015. As the first electronic shifting groupset in mountain biking, it's no surprise that it's also the most expensive. By removing the mechanical cable, mud and dirt won't plague shift quality. Shift performance is excellent
Shimano XTR Di2 was introduced in 2015. As the first electronic shifting groupset in mountain biking, it's no surprise that it's also the most expensive. By removing the mechanical cable, mud and dirt won't plague shift quality. Shift performance is excellent

Shimano also offers XT and XTR in electronically-operated Di2  variants. 

These drivetrains do away with traditional cables in favor of a system that's actuated by motor driven derailleurs powered by a battery, which can either be frame mounted or hidden within the seatpost, seat tube or steerer tube. 

The advantage of the electronic system is consistent gear shifts and very low maintenance. Another perk of Di2 is sequential shifting, whereby both the front and rear derailleurs are operated with a single control, and the system decides whether to shift at the front or rear for the next closest jump. 

Shimano's XT Di2 groupset
Shimano's XT Di2 groupset

The downsides are the high cost and remembering to occasionally recharge the battery.

These Di2 groupsets share the same crankset, cassette, chain and brakes of the respective mechanical groupsets.

SRAM

SRAM's mountain bike groupset range is divided into two families, with single-chainring groupsets (many of which get a ‘1’ featured in the name) separate from the double and triple options. Like Shimano, SRAM offers a discipline-specific option too, in the form of X01 DH

While SRAM’s recent success story is its dedicated single-chainring groupsets, the brand was also a strong advocate of doubles over triples. We'll run through the 2x and 3x groups followed by SRAM's ever-expanding 1x family. 

X3

SRAM X3 isn't a complete groupset, but does mark the entry of SRAM's mountain bike components. SRAM offers cassettes, chains and cranksets as separate 'non-series' options here
SRAM X3 isn't a complete groupset, but does mark the entry of SRAM's mountain bike components. SRAM offers cassettes, chains and cranksets as separate 'non-series' options here

The X3 level of components is the most basic level of SRAM's componentry. 

Designed for 7-speed drivetrains, the shifters and derailleurs make heavy use of plastics. These components are suitable for light recreational riding, but not trail use. 

X4

Just like SRAM X3 , X4 also isn't a true groupset. With just a shifter set and rear derailleur on offer, it's normal to see other brands mixed in with SRAM X4 parts
Just like SRAM X3 , X4 also isn't a true groupset. With just a shifter set and rear derailleur on offer, it's normal to see other brands mixed in with SRAM X4 parts

Next in the line is X4. Like X3, these components are often found on budget bikes.

X4 shifters are available in 7-, 8- and 9-speed versions. 

X5

X5 is SRAM's first full groupset and it's a high-value option for those seeking 10-speed gearing. SRAM introduces its 2x10 gearing at this level
X5 is SRAM's first full groupset and it's a high-value option for those seeking 10-speed gearing. SRAM introduces its 2x10 gearing at this level

This is the first of SRAM's groups you are likely to find on entry-level mountain bikes. It's a trail-worthy group for recreational riding, though it lacks a clutch on the rear derailleur. 

This 10-speed group is available with a 2x or 3x crankset. (There is also an older 9-speed version still available.)

X7

Often seen on lower-priced hardtails and dual suspension bikes, SRAM X7 is a good choice for regular off-road use on a budget
Often seen on lower-priced hardtails and dual suspension bikes, SRAM X7 is a good choice for regular off-road use on a budget

The X7 group has a few additional features that make it stand out from X5. The most important upgrade feature of this 10-speed group is the addition of a clutch on the rear derailleur to improve chain retention. 

The X7 shifter has a more precise action than the X5 shifter and is also compatible with SRAM's MatchMaker system, which allows riders to use one clamp to secure shift levers and brakes. 

X7 is available with a 2x or 3x crankset. 

X9

Equivalent to Shimano SLX, X9 is the workhorse groupset of SRAM's range. Nearly all the performance features are present at this level, with slightly cheaper construction methods and materials keeping prices down, but the weight is higher
Equivalent to Shimano SLX, X9 is the workhorse groupset of SRAM's range. Nearly all the performance features are present at this level, with slightly cheaper construction methods and materials keeping prices down, but the weight is higher

The X9 group is a durable, trail-worthy 10-speed group available in 2x and 3x configurations.

There's more use of aluminum versus plastic on the shifters and derailleurs and the X9 crankset features hollow crankarms to save weight. 

X0

A long-standing popular choice in performance groupsets, SRAM X0 continues with its 2x10 gearing. It's often compared to Shimano XT, but X0's use of carbon fiber means it's lighter and more expensive
A long-standing popular choice in performance groupsets, SRAM X0 continues with its 2x10 gearing. It's often compared to Shimano XT, but X0's use of carbon fiber means it's lighter and more expensive

Long considered as SRAM’s best option for performance without breaking the bank, X0 is a 10-speed groupset that introduces carbon fiber for weight savings and precision machining for shift accuracy.

While most often found in a 2x version, SRAM does offer a triple crankset for this group. 

XX

SRAM XX is a 2x10 cross-country race focused groupset. While still available, it has been surpassed by SRAM's 1x11 and 1x12 mountain groups
SRAM XX is a 2x10 cross-country race focused groupset. While still available, it has been surpassed by SRAM's 1x11 and 1x12 mountain groups

Until the advent of SRAM's 1x11 systems, the XX group was the company's premier off-road drivetrain.

It's a dedicated 2x10 group and makes extensive use of carbon fiber and titanium hardware to maximize weight savings. 

NX

SRAM NX is the gateway to SRAM's 1x11 drivetrains
SRAM NX is the gateway to SRAM's 1x11 drivetrains

SRAM NX is the most affordable of SRAM's 1x11 groups. This group features SRAM's narrow/wide X-Sync chainring and a wide range 11-42t cassette. 

GX

SRAM GX is a very budget-friendly 1x group that's suitable for real mountain biking
SRAM GX is a very budget-friendly 1x group that's suitable for real mountain biking

Sharing many designs and internal features of the top-level 1x offerings, SRAM GX components are a popular choice on mid-priced bikes.

Unlike NX, GX is available in 1x11 and 2x11 versions, as well as a dedicated 7-speed downhill group. 

EX1

SRAM's EX1 drivetrain aims to meet the needs of the latest breed of e-mountain bikes
SRAM's EX1 drivetrain aims to meet the needs of the latest breed of e-mountain bikes

SRAM's EX1 group was developed specifically for the growing e-mountain market. Electric assistance and its associated rapid shifts put greater stress on components.

To counter this, EX1 features an 8-speed cassette, with the big cog 7mm inwards of where it would be on an 11spd setup to reduce cross-chaining and an extra-strong chain that's positionally synced with specific teeth to ease strain on the drivetrain while changing gear. 

X1

X1 is SRAM's budget-friendly 1x groupset. It shares much of the performance and features of XO1 and even XX1, but less carbon fiber and more aluminum means a higher weight
X1 is SRAM's budget-friendly 1x groupset. It shares much of the performance and features of XO1 and even XX1, but less carbon fiber and more aluminum means a higher weight

The X1 group is a solid choice for riders wanting a reliable 1x11 drivetrain that won't break the bank. It shares many of the same features of the top 1x11 groups with a slight weight penalty. 

X01

SRAM X01 was perhaps the most sought-after groupset of 2014. X01, along with X1 and XX1, offers a unique 11-speed setup where the cassette and rear derailleur are greatly different to offer a huge 10-42t range, without the option of a front derailleur
SRAM X01 was perhaps the most sought-after groupset of 2014. X01, along with X1 and XX1, offers a unique 11-speed setup where the cassette and rear derailleur are greatly different to offer a huge 10-42t range, without the option of a front derailleur

The X01 group sits one tier from the top of SRAM's 1x11 family. It's a solid choice for riders who want the performance of the top group but can live with a very minor weight penalty. 

X01 DH

SRAM's discipline-specific groupset, X01-DH, uses many of SRAM's single-ring technologies but with a far smaller gear range for downhill racing
SRAM's discipline-specific groupset, X01-DH, uses many of SRAM's single-ring technologies but with a far smaller gear range for downhill racing

X01 DH is a purpose-built groupset for downhill racing and is available as either a 7- or 10-speed setup.

XX1

SRAM XX1 is the groupset that started the single-ring revolution
SRAM XX1 is the groupset that started the single-ring revolution

This is SRAM's top 1x11 speed group. It was the group that lead the 1x revolution when it was introduced in 2012. 

X01 Eagle and XX1 Eagle

SRAM's XX1 and X01 Eagle drivetrains get a massive 500% gear range thanks to 10-50t cassettes
SRAM's XX1 and X01 Eagle drivetrains get a massive 500% gear range thanks to 10-50t cassettes

Introduced in 2016, SRAM's XX1 and X01 Eagle 12-speed drivetrains offer a 500 percent gear range through huge 10-50t cassettes.

Eagle components are currently priced at a point that'll only reach those with deep pockets, but knowing SRAM's approach, it shouldn't be too long before its ultra-wide range makes its down to a price that's easier to swallow.

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