SRAM GX groupset – first look

New single and double transmission components to supercede X7/X9

SRAM has unveiled an all-new mountain bike drivetrain. Badged GX, the new group is available in 1x and 2x configurations and replaces SRAM’s long-standing X7 and X9 component lines.

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Most importantly, GX signifies 1x transmissions taking a big step up in affordability, with the cost of a complete 1x GX group dropping in at £451/ €588/US$564, a massive saving over the cheapest 1x dedicated transmission currently on sale – SRAM’s own X1 group.

Like XX1, X01 and X1, GX in 1×11 and 2×11 configurations features a full 10-42t cassette and uses the X-Sync chain retention technology that SRAM’s mountain bike groups are now renowned for.

Related: SRAM GX 1x exclusive first ride review

OE Implications and cheaper spares

The OEM take up of GX1 is an exciting prospect, particularly with SRAM telling us to expect GX on bikes as low as €1,000. To put that into perspective, the cheapest X1-equipped bikes this year are still around the €1,799 mark.

We can also expect manufacturers to mix and match the cross compatible GX1 components with the company’s other 1x specific groups, say placing a GX shifter and cassette with an X1 derailleur. Cross compatibility means that current SRAM XX1, X01 and X1 owners will be able to replace broken or worn out parts with these simpler but heavier components if desired.

Shimano’s slowness to deliver a 1x solution and the cost of SRAM’s current 1x groups has meant a barrage of conversion and aftermarket components has entered the market. Swapping out OE kit for wide range cassettes, derailleur cages and narrow wide rings has become the norm as riders try and get the advantages of a 1x system as cost effectively as possible.

Sometimes these components simply don’t work as well as intended and durability of parts can be affected. This is where GX gets the upper hand – by being extensively tested and sold as a complete system each component is designed to work with each other and durability, as with SRAM’s other 1x groups, should be strong.

SRAM’s gx group is based on trickle-down technology from the company’s other 1x transmissions:

Compromise in the right places

What SRAM claims to have done with GX is offer the same shifting performance as its other dedicated single ring drivetrains but at a fraction of the cost. So, just how has it managed to take so much off of that retail price? Well, it’s not just a case of making X1 components a bit heavier – that’s for sure.

To reach the desired sweet spot between weight, durability and cost of manufacturing, GX has swapped out some fancy for functional and introduced unique construction methods including a rather special cassette.

On paper, using SRAM’s own claimed weight information, the GX group starts at a smidge over 1.7kg – just 78g over that of the lightest X1 configuration.

SRAM hasn’t phased out 10-speed shifting entirely and a 2×10 version of GX will be available with a choice of two regular range 10-speed cassettes.

1×11 Component breakdown

XG-1150 cassette

SRAM gx cassette:
SRAM admits that this was the most challenging component to produce more economically. Whereas XX1 and X01 get a cassette extensively and expensively machined from stainless steel and X1 gets a cost cutting partially pinned alloy/steel item, GX had to reduce costs further. SRAM’s solution arrives in the form of an entirely pinned item that consists of only pressed steel cogs.

The result is a claimed 393g part, only a 78g penalty over the X1 version. There’s also the familiar corrosion preventing black finish, 10-12-14-16-18-21-24-28-32-36-42t gear ratios and exclusive compatibility with XD driver bodies.

Pricing is US$144/£115/€150

GX rear derailleur

SRAM gx derailleur:

The GX rear derailleur holds the same technologies as its more expensive siblings including the horizontal parallelogram design, roller bearing clutch and handy cage lock function. Two offset 12-tooth pulleys feature the same X-Sync chain retention technology of SRAM chainrings; these work to reduce side to side chain movement and provide better guidance for shifting.To keep costs down certain alloy parts take a shift from being forged to die-cast. It’s not as pretty and a bit of weight has to be added to achieve the same levels of strength. The claimed weight penalty over X1’s components is just 9g though.

Pricing is US$115//£92/€120

GX Shifters

SRAM gx shifters:

As far as shifting is concerned GX is available with both trigger and gripshift hardware options. The former is a 122g component that looks near enough identical to that of X1 and retains its multi-position mounting bracket and MatchMaker compatibility.The grip shifter weighs 144g and looks near enough identical to the part that already exists on X01 and XX1 configurations.

Trigger shifter – US$43/£34/€45

Grip shifter – US$52/£42/€54

GX Cranks

SRAM gx cranks:

GX cranks will come in two alloy flavours – the GX1400, a 680g part that makes use of SRAM’s Open Core Technology and a cheaper, simpler, and slightly more portly GX1000 version at 720g. GX cranks are available with a 24mm or 30mm spindle with options to fit PressFit 30, BB30, GXP and PressFit GXP bottom brackets. Compatibility also extends to the new BOOST148 wider axle standard.From US$120/£96/€125 to US$225/£180/€235 depending on configuration

PC-X1 Chain

SRAM has chosen to use the same 258g 11-speed solid pin chain as debuted in its x1 drivetrain:

SRAM has chosen to use the same 258g 11-speed solid pin chain as debuted in its X1 drivetrain.Pricing is $37/£27.99/€33

1×11 GX group weight comparison


XX1 claimed weight (g)

X01 claimed weight (g)

X1 claimed weight (g)

GX claimed weight (g)

Shifter (trigger)





Rear derailleur






















from 1640

from 1718

2×11 group

SRAM gx 2×11 groupset: sram gx 2×11 groupset

GX is also available as a 2×11 transmission with two levels of double cranks, a front derailleur with several mounting options plus a dedicated double rear derailleur and the same cassette as the 1×11 group. It’s available with either trigger or grip shifters.Prices for the 2×11 group are as follows:

GX1400 2×11 trigger shifter US$661/€689/£529

GX1400 2×11 grip shifter US$677/€705/£542

2×10 group

SRAM gx 2×10 groupset:
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SRAM also offers GX in a 2×10 option, this time with only one crank option, a different derailleur design and no grip shift option. GX 2×10 arrives with a choice of two regular range 10-speed cassettes. To easily distinguish the 10-speed kit SRAM has dropped the red accents that you’ll find on other GX parts. A complete 2×10 GX groupset will retail for US$511/€534/£408