We took our Matt Jones-inspired Marin San Quentin and shrunk it down to fit 20” wheels. It's the perfect bike for kids who are ready for their first proper, hardcore hardtail mountain bike.

The Marin San Quentin 20”, 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 20” will feel just like a ‘grown up’ mountain bike to your little ripper, built with a stout Series 2 aluminum frame, 20” wheels, a fully adjustable kid specific Manitou J-Unit suspension fork, 8-speed Shimano drivetrain and kid’s specific hydraulic disc brakes.

Gallery

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.

Geometry

All lengths in millimeters

Technology

SERIES 2 ALUMINUM FRAME

San Quentin 24” and 20” both feature a Series 2 aluminum frame, with a tapered headtube, 3D forged dropouts, IS brake mounts, semi-internal cable routing and 135mm open dropouts.

Learn More

DIRT JUMP INSPIRED FRAME STYLE

Taking cues from the Alcatraz, as well as the full-size San Quentin lineup, the San Quentin 24” and 20” proved all the benefits of DJ style, with massive standover, slick frame tubes, and a hot paint job.

MODERN TRAIL GEOMETRY

A slack headtube angle paired with a steep seat tube angle creates a ride that will fly uphill, yet descend like it’s on rails. The balanced rider position is puts the rider weight between the wheels for steady climbing and handling on flats, while the slack front end helps to add higher speed stability through turns and rough patches.

1X WIDE-RANGE DRIVETRAINS

Modern 1x drivetrains, just like the larger San Quentins, give the rider the benefits of shifting simplicity and chain retention.