Marin San Quentin Jr - 2026

We took our Matt Jones-inspired Marin San Quentin and shrunk it down to fit 24” wheels. It's the perfect bike for kids who are ready for their first proper, hardcore hardtail mountain bike.

The Marin San Quentin 24”, just like the big kid’s version, 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.

The San Quentin 24” will feel just like a ‘grown up’ mountain bike to your little ripper, built with a stout Series 2 aluminum frame, 24” wheels, a Manitou suspension fork, Shimano CUES drivetrain and kid’s specific hydraulic disc brakes.

San Quentin Jr 24

Specifications
Frame Series 2 6061 Aluminum, 24” Wheels, Disc Specific, 30.9 Post and Dropper Compatible
Front Suspension Manitou Junit Sport, 24", 100mm Travel, Air Sprung, Adjustable Rebound, Tapered Steerer, 15x110mm Axle
Rim Marin, Double Wall Alloy, 27mm Internal
Hub Rear Forged Aluminum, 32H, Disc Specific
Hub Front Forged Aluminum, 32H, Disc Specific
Spokes 14g Stainless Steel
Tires Delium Versatile, 24”x2.4”, Light Construction, Wire Bead, Tubeless Compatible
Derailleur Rear Shimano CUES, RD-U4000, 9-speed
Derailleur Front -
Shift Lever Shimano CUES, SL-U4000, 9-speed
Crankset Forged Alloy, Narrow Wide 30T, 140mm
Bottom Bracket Sealed Cartridge Bearings, Square Taper
Chain KMC X-Glide
Cassette Shimano CUES, CS-LG3000, 9-Speed, 11-46T
Brakes Front Shimano MT200, Hydraulic, 160mm Rotor
Brakes Rear Shimano MT200, Hydraulic, 160mm Rotor
Brake Levers Shimano Hydraulic
Handlebar Marin Riser, 31.8mm Clamp, 30mm Rise, 580mm Width, 19mm OD Grip Section
Stem Marin Alloy, 40mm
Grips Marin MTB, Small Diameter
Headset FSA No. 57E
Seatpost Integrated With Saddle
Saddle Marin One-Piece Saddle/Post Combo, 27.2mm Alloy Post
Pedals Kids Specific Nylon Pedal

San Quentin Jr 20

Specifications
Frame Series 2 6061 Aluminum, 20” Wheels, Disc Specific, 30.9 Post and Dropper Compatible
Front Suspension Manitou Junit Sport, 20", 80mm Travel, Air Sprung, Adjustable Rebound, Tapered Steerer. 15x110mm Axle
Rim Marin, Double Wall Alloy, 26mm Internal, Tubeless Compatible
Hub Rear Forged Aluminum, 32H, Disc Specific
Hub Front Forged Aluminum, 32H, Disc Specific
Spokes 14g Stainless Steel
Tires Delium Versatile, 20”x2.4”, Light Construction, Wire Bead
Derailleur Rear Shimano Altus
Derailleur Front -
Shift Lever Shimano Altus SL-M315, 8-Speed
Crankset Forged Alloy, Narrow Wide 30T, 127mm
Bottom Bracket Sealed Cartridge Bearings, Square Taper
Chain KMC Z8
Cassette Shimano 8-speed, 11-32T
Brakes Front Tektro HD-J285 Kid's Specific Hydraulic Disc
Brakes Rear Tektro HD-J285 Kid's Specific Hydraulic Disc
Brake Levers Tektro Kid's Specific Short Reach Lever for Hydraulic Brake
Handlebar Marin Riser, 31.8mm Clamp, 30mm Rise, 580mm Width, 19mm OD Grip Section
Stem Marin Alloy, 40mm
Grips Marin MTB, Small Diameter
Headset FSA No. 57E
Seatpost Integrated With Saddle
Saddle Marin One-Piece Saddle/Post Combo, 27.2mm Alloy Post
Pedals Kids Specific Nylon Pedal

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