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San Quentin 3 Frame Kit

2025 1 San Quentin 3 2 2025 1 San Quentin 3 2

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  • Price: $549.00*
  • Wheel Size: 29"
  • Frame: Aluminium
  • Size Range: S, M, L, XL
  • Manufacturer’s suggested retail price may not include additional shipping or preparation charges. Please contact your local Marin dealer for a quote.

The Marin San Quentin shreds the boundaries of the mountain bike genres - doing it all with a huge splash of big air, speed and style.

Designed with the input of freeride legend Matt Jones, the San Quentin takes the DNA of our dirt-jumping Alcatraz and mutates it into a go-further and faster all-round, hardcore hardtail. Pedal all day in the hills, send it at the dirt jumps, carve the skatepark, go big in the bike park - it's all good on the San Quentin.

The Marin San Quentin Frameset is supplied with a headset, seat clamp and Marin rubber grommet kit for internal cable routing.

Specifications

  • Frame

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

  • Headset

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

  • Extras

    Marin Rubber Grommet Kit For Internal Cable Routing

  • Extras

    Bolt-On Thru-Axle

  • Extras

    Marin Seat Clamp

Specifications, pricing, and availability are subject to change without notice.

Geometry

San Quentin 3  Frame Kit geometry diagram
S M L XL
Stack 6321 636 645 650
Reach 422 450 470 500
Headtube Angle 64° 64° 64° 64°
Headtube Length 115 120 125 130
Seattube Angle 77° 77° 77° 77°
Seattube Length 330 380 410 420
Toptube Effective 568 596 619 650
BB Height 327 327 327 327
BB Drop 50 50 50 50
Chainstay 430 430 430 430
Wheelbase 1182 1212 1236 1268
Standover Height 650 683 688 695

All lengths in millimeters

Technology

SERIES 3 AND 2 ALUMINUM FRAMES

The San Quentin 1 features a Series 2 aluminum frame, with tapered head tubes, 3D forged drop outs, IS brake mounts, and semi-internal cable routing. The San Quentin 2 and 3 feature Series 3 aluminum frames, with more advanced tube forming, more complex dropouts, post mount disc tabs, full internal cable routing, and a boost 148mm thru-axle.

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Detail image of the San Quentin 3 headtube, showing the slack 65° headtube angle

MODERN TRAIL GEOMETRY

The slack head tube angle paired with a steep seat tube angle create a ride that will fly uphill with perfect front wheel precision but then descend like it’s on rails. The balanced rider position thanks to the steep seat tube puts your weight between the wheels for impressive climbing and handling on flats, while the slack front end and short rear center help to pull you through the rough descents and corners with an intuitive feel.

Detail image of the San Quentin 3, highlighting the crankset and ISCG 05 tabs

ISCG TABS

San Quentin 2 and 3 models feature ISCG 05 tabs for easy chain retention device installation for rowdier riders.

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