Marin San Quentin 1 27.5 – Gray-Black – Maximum Fun, Minimum Spend

The Marin San Quentin 1 proves that you don’t need to spend big to ride hard. With a dirt jump–inspired frame, aggressive trail geometry, and a solid spec list, it’s a budget-friendly hardtail that looks and rides like a bike twice the price. From flow trails to techy descents and jump lines, this rig is built to keep the stoke high without breaking the bank.

Built around a Series 2 aluminum frame, the San Quentin 1 features a 130mm SR Suntour XCM34 coil fork, wide 27.5x2.6” Vee Tire Flow Snap rubber, and Tektro hydraulic disc brakes for consistent control and confidence. Whether you’re new to the sport or just want a fun, capable hardtail that punches above its price point, this bike is ready to roll.

Key Features

• Series 2 6061 aluminum frame with internal cable routing and modern trail geometry
• 130mm SR Suntour XCM34 coil fork with bolt-on thru-axle for stability and control
• Wide-range 1x9 microSHIFT drivetrain with clutch-equipped rear derailleur
• Tektro M275 hydraulic disc brakes with 180mm rotors for reliable stopping
• Dirt jump styling meets trail-ready performance
• 27.5 x 2.6” tires offer grip and comfort across loose or rocky terrain
• Looks like a big-budget bike—rides like one too

Full Specifications

Frame & Suspension

• Frame – Series 2 6061 Aluminum, Double Butted, 141mm Open Dropout, 73mm Threaded BB, Internal Cable Routing
• Fork – SR Suntour XCM34, Boost Spacing, 130mm Coil Travel, 15x110mm Bolt-On Thru-Axle

Drivetrain

• Shifter – microSHIFT SL-M9195-R, 1x9
• Rear Derailleur – microSHIFT RD-M9195M, 9-Speed, Clutch Equipped
• Crankset – Marin Forged Alloy, 32T Narrow-Wide Chainring, Boost Spacing
• Bottom Bracket – Sealed Cartridge Bearing, Square Taper
• Cassette – SunRace 9-Speed, 11-46T
• Chain – KMC X-9

Brakes

• Front Brake – Tektro M275 Hydraulic Disc, 180mm Rotor
• Rear Brake – Tektro M275 Hydraulic Disc, 180mm Rotor
• Brake Levers – Tektro M275 Hydraulic

Cockpit

• Handlebar – Marin Mini-Riser, 6061 Double Butted Alloy, 780mm Width, 28mm Rise
• Stem – Marin Alloy, 45mm
• Grips – Marin MTN, Closed-End
• Headset – FSA No.57E, Semi-Sealed Cartridge Bearings

Seatpost & Saddle

• Seatpost – Marin Alloy, 30.9mm
• Saddle – Marin Speed Concept
• Pedals – Marin Oso OE Flat

Wheels & Tires

• Rims – Marin Aluminum Double Wall, 29mm Internal Width, Tubeless Compatible, 32H
• Front Hub – Forged Alloy, 110x15mm, Sealed Cartridge Bearing
• Rear Hub – Forged Alloy, 141mm QR, Quad Sealed Cartridge Bearings
• Spokes – 14g Black Stainless Steel
• Tires – Vee Tire Co. Flow Snap, 27.5 x 2.6”, MPC Compound, Wire Bead

Why You Want This Bike

Because it rides like a ripper, looks like a pro build, and leaves you with money for road trips, park passes, or a burrito and post-ride pint. The San Quentin 1 is for riders who want legit trail performance without blowing the budget. Whether you're just starting out or just want a no-fuss, all-fun hardtail that’s ready to shred, this is your jam.

Send hard. Spend light. Ride Marin.