Marin B17 3 review

Plus tyred trail bike

Our rating 
3.5 out of 5 star rating 3.5
GBP £2,900.00 RRP | AUD $4,799.00 | USD $3,700.00

Our review

A well packaged bike that would benefit from proper big wheels
Buy if, You want a versatile big wheeler
Pros: Great spec and value for money, decent rear suspension
Cons: Tyres aren’t to my taste
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Marin’s B17 is one of the few remaining plus-tyred trail bikes out there it seems, perhaps a sign that the plus ‘thing’ didn’t quite take off as was expected — especially in the highly competitive mid-range trail bike market (arguably it still has its place in the hardtail world, and on e-MTBs). And, it’s fair to say that it is the tyres on the B17 that hold the bike back, as otherwise, it’s a truly sorted package.

  • The Marin B17 3 is one of our Bike of the Year bikes for 2018. To read reviews of the other contenders and the categories tested across road, mountain and women’s bikes, visit our Bike of the Year hub.

The 120mm suspension frame’s shape is pretty much average in terms of tube lengths and angles, with a centred, well-balanced alloy frame that sits you nicely between the wheels, relatively low down for a confident, stable bike.

The reach for a size large is 456mm, while the chainstays are 435mm. The head angle is 67 degrees and the effective seat angle 73.4. While none of these figures push any boundaries, they’re in the ball-park with the rest of the bikes tested in Bike of the Year 2018. However, it’s the bottom bracket height of 323mm (35mm drop) where the Marin stands out, being pretty much the lowest of the 2018 BOTY cohort.

This is combined with a suspension linkage that’s just what I look for from a trail bike. At the start of its stroke, the suspension is soft and supple, but it ramps up nicely through its mid-stroke in to a nicely progressive finish.

A traditional four-bar linkage controls the rear wheel
Tom Marvin / Immediate Media

The supple start of the stroke gives traction and control on less lumpy terrain, tracking the ground nicely boosting grip and control. The progressivity through its stroke confidently deals with bigger hits deep into the travel, but adds stability through the mid, allowing you to pump the bike through terrain and keeping the bike propped up in high-compression corners.

The suspension is controlled by a top-level RockShox Super Deluxe RCT3 shock — its piggyback design meaning consistent feel even on longer descents as there’s more oil to circulate around. On longer descents this means the oil temperature remains more stable, so the damping characteristics of the shock stay the same.

The spec on the B17 includes SRAM’s GX Eagle groupset
Tom Marvin / Immediate Media

Marin has generally nailed the component package — a RockShox Pike RC with 130mm of travel controls the front, while SRAM’s GX Eagle is as good as you could wish for on a bike at this price point.

It comes with the slightly heavier duty Descendant alloy crank with a speed-friendly 34t chainring — the 34:50 smallest gear ratio should be low enough to winch up most hills, but if you live in a particularly steep area, swapping to a 30t or 32t is a relatively quick and easy job.

The RockShox Super Deluxe RC3 is a quality damper
Tom Marvin / Immediate Media

Shimano’s Deore brakes might be a touch wooden, but they’re reliable stoppers, so give little to complain about. Popping the 180mm rotor from the front wheel on to the back wheel and adding a new 200mm rotor to the front wouldn’t go amiss for faster or heavier riders, just to make the most of the power on offer from the Deore calipers.

The Deity cockpit looks good, though the Skyline 787mm bar has a slightly odd-feeling sweep and the boxy stem makes the front end feel a touch harsh on rockier trails. The bike rolls on Stans’ Major S1 rims with a wide 38mm internal width, built around Formula hubs.

Wide Deity bars aren’t often seen as standard on bikes
Tom Marvin / Immediate Media

My test bike came with VeeTire Crown Gem tyres, which I wasn’t overly sold on — they’re noisy, reasonably fast rolling, but didn’t offer the grip I was quite looking for.

Marin spec WTB Ranger 2.8in tyres, with the Tough/Fast compound. This is a tougher tyre, though with a harder compound that doesn’t have the same level of grip that the softer version has. While I didn’t get to test the bike with these tyres, I’d probably budget for a pair of Maxxis Minion plus tyres to make the most out of the plus-package, or sling in a pair of 29er wheels, as I did as an experiment during testing.

Vee Tire Crown Gem tyres roll surprisingly well
Tom Marvin / Immediate Media

The result of that was a bike that benefited from the roll-over potential of the bigger wheels, without the sluggish feel of the chunky rubber. If it came like this out of the box, it would be challenging for a higher score, and would in effect be a higher-spec Rift Zone.

Also consider…

If you’re looking for alternative options, have a look at the following list. Each bike has been thoroughly tested and robustly reviewed. Click on the links for the full review.


Product Specifications


Name B17 3
Brand Marin

Available Sizes S M L XL
Seatpost KS Lev
Wheelbase (in) 46.5
Top Tube (in) 22.84
Standover Height (in) 28.31
Seat Tube (in) 17.72
Chainstays (in) 17.13
Bottom Bracket Height (in) 12.82
Wheelset Formula hubs, Stan's Major S1 38mm rims
Weight (kg) 14.2
Stem Deity Copperhead 50mm
Shifters SRAM GX Eagle, 1x12-speed
Seat Angle 73.4
Brakes Shimano Deore M6000
Saddle WTB Volt Comp
Rear Tyre Vee Tire Co Crown Gem 2.8" tyres
Rear Shock RockShox Super Deluxe RCT3 Debonair
Rear Derailleur SRAM GX Eagle, 12-speed
Head Angle 67
Handlebar Deity Skyline 787mm
Front Tyre Vee Tire Co Crown Gem 2.8" tyres
Frame Material 6061 Aluminium 120mm
Fork RockShox Pike RC 130mm
Cranks SRAM Descendant 6K
Frame size tested L