The Marin San Quentin 1 in Fade Grey (Black/Grey Fade) is a "hardcore hardtail" designed for aggressive trail riding, jumps, and bike park sessions. The 29" wheel version is a newer addition to the lineup, offering better rollover and stability compared to the classic 27.5" model while keeping the bike's playful "dirt jump" DNA.
Sizing & Geometry (Medium / 29")
The Medium (MD) frame for the 29er is optimized for riders between 5'6" and 5'10" (168cm – 178cm).
Metric
29" Medium (MD) Value
Reach
440 mm
Stack
628 mm
Head Tube Angle
64° (Slack for downhill stability)
Seat Tube Angle
77° (Steep for efficient climbing)
Wheelbase
1207 mm
Chainstay
425 mm (Short for agility)
Technical Specifications
Frame: Series 2 6061 Aluminum, Double Butted, Internal Cable Routing, 141mm Open Dropout.
Handlebar: Marin Mini-Riser, 780mm width for maximum leverage and control.
Why Choose the San Quentin 1?
Progressive Geometry: It features a very slack head angle and a long reach, which is usually only found on much more expensive bikes. This makes it incredibly stable on steep descents.
Upgrade Ready: While it comes with a solid entry-level spec, the frame features a tapered headtube and internal dropper post routing, making it a great platform to upgrade as your skills grow.
The 29er Advantage: On the San Quentin, the 29" wheels help carry momentum over roots and rocks better than the 27.5" version, making it a faster choice for traditional trail riding.
Important Note
The San Quentin 1 uses a 141mm Boost Open Dropout (Quick Release) at the rear rather than a 12x148mm Thru-Axle. This keeps the cost down but is something to keep in mind if you plan on upgrading the rear wheel in the future.
