San Quentin 3 Bike

  • SALE
  • £1,375.00
  • Regular price £1,845.00
VAT included.

27.5 is sometimes called the "fun" wheel size and this bike is a shining example of why that is! Marin makes a big deal about the bike being influenced by their Alcatraz dirt jump frame and having development input from freerider Matt Jones.

Marin's San Quentin 3 is the top of their 27.5 range of hardtails, so the spec is great and the frame has refinements over the other models in the range. The tubing is more advanced with fully internal cable routing, but more importantly as far as we're concerned, the rear axle is Boost 148mm spaced. Wider spacing allows the wheel builder to use a wider hub, allowing for a stiffer rear wheel, and opening up the choices should you want to upgrade the wheels in future.

The frame also features ISCG05 chainguide tabs; adding a guide makes a big difference to chain retention when you've no rear suspension on rougher trails.

UK customers - you can use the Government’s “Cycle to Work” scheme to a bike or frame from 20Twenty, and you could save 25-39%. You can buy a bike, frame, bike and accessories, or just accessories through the Cycle to Work scheme. We can even provide you with a custom-built bike through the scheme.

We use several Cycle to Work schemes, including:

There is no £1000 limit any more, though your employer might have a limit. The Green Commute Initiative website has a savings calculator.

For more information, click here to contact us or call 01330 828562

Marin Size Guide

Stack 586.1 590.7 599.7 604.3
Reach 422 444 464 484
Headtube Angle 65° 65° 65° 65°
Headtube Length 105 110 120 125
Seattube Angle 75° 75° 75° 75°
Seattube Length 385 430 475 515
Toptube Effective 579.1 602.3 624.7 645.9
BB Height 310 310 310 310
BB Drop 50 50 50 50
Chainstay 425 425 425 425
Wheelbase 1144.8 1168.9 1193.1 1215.3
Standover Height 664 677 714 745
Fork Offset 46 46 46 46
Seatpost Diameter 30.9 30.9 30.9 30.9
Handlebar Width 780 780 780 780
Stem Length 45 45 45 45
Crank Length 170 175 175 175

Size Rider Height
XS 146cm - 157cm
Small 157cm - 165cm
Medium 165cm - 173cm
Large 173cm - 180cm
XL 180cm - 188cm


Series 3 6061 Aluminum, Double Butted Frame, Internal Shifter and Dropper Post Routing, External Brake, 12x148mm Thru-Axle, 73mm Threaded BB

Front Suspension

RockShox Revelation RC, 110x15mm Boost Spacing, Fast Black Stanchions, 130mm Travel, Bolt-On Thru-Axle


Marin Aluminum Double Wall, 29mm Inner, Sleeved Joint, Disc Specific, 32H, Tubeless Compatible

Hub, Rear

Shimano HB-MT410B, 148x12mm, Centerlock, Microspline Freehub Body

Hub, Front

Shimano HF-MT410B, 110x15mm, Centerlock

Spoke, Nipples

14g Black Stainless Steel


Maxxis Assegai, 27.5x2.5", 3C MAXX TERRA, EXO, Tubeless Compatible

Derailleur, Rear

Shimano Deore, 12-Speed, SGS

Shift Lever

Shimano Deore, 12-Speed, SL-7100R


FSA Comet, Modular 1x, 32T Direct Mount Chainring, MegaTooth Technology, Boost Spacing

Bottom Bracket

Mega EXO 73mm BSA


KMC X-12 Silver and Black


Shimano, Deore 12-Speed, 10-51T

Brake, Front

Shimano MT420, 4-Piston Hydraulic Disc Brake, 203mm Rotor

Brake, Rear

Shimano MT420, 4-Piston Hydraulic Disc Brake, 180mm Rotor

Brake Levers

Shimano MT4100 Hydraulic Lever, I-Spec EV Compatible


Marin Mini-Riser, 6061 Double Butted Aluminum, 780mm Width, 28mm Rise, 5º Up, 9º Back


Marin 3D Forged Alloy, 35mm


Marin Single Clamp Locking


FSA No 57E, Semi-Sealed Cartridge Bearings, 1 1/8" x 1 1/2”


X-Fusion Manic, 1x Composite Remote, Size S 125mm Travel, All Other Sizes: 150mm Travel, 30.9mm


Marin Speed Concept


Nylon Platform



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