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Marin San Quentin 20"

Marin San Quentin 20"
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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, an SR Suntour XCM suspension fork, 8-speed Shimano drivetrain and kid's specific hydraulic disc brakes.

- 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.

- 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.

- 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.

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


A - Stack (mm) 499
B - Reach (mm) 310
C - Headtube Angle (°) 65°
D - Headtube Length (mm) 90
E - Seattube Angle (°) 75°
F - Seattube Length (mm) 308
G - Toptube Effective (mm) 443.4
H - BB Height (mm) 260
I - BB Drop (mm) 10
J - Chainstay (mm) 340
K - Wheelbase (mm) 922
L - Standover Height (mm) 540
M - Fork Offset (mm) 40
Seatpost Diameter (mm) 30.9
Handlebar Width (mm) 590
Stem Length (mm) 35
Crank Length (mm) 140
Rider Height (In) 3'8" - 4'4"


Frame Series 2 6061 Aluminum, 20” Wheels, Disc Specific, 135mm Dropouts
Fork SR Suntour XCM 24 BOOST, 80mm Travel, 110mm Axle Spacing
Wheels Marin, Double Wall Alloy, 25mm Internal
Hubs Forged Aluminum, 32H, Disc Specific
Tires Vee Tire Crown Gem, 20x2.6”, Wire Bead
Bottom Bracket Sealed Cartridge Bearings, Square Taper
Crankset Forged Alloy, Narrow Wide 30T, 140mm
Shifters Shimano Altus SL-M315, 8-Speed
Rear Derailleur Shimano Altus
Cassette/Freewheel Shimano 8-speed, 11-32T
Chain KMC Z8
Brakes Tektro HD-J285 Kid's Specific Hydraulic Disc
Brake Levers Tektro Kid's Specific Short Reach Lever for Hydraulic Brake
Handlebars Marin Riser, 31.8 clamp, 30mm Rise, 590mm Width
Tape/Grips Marin MTB
Stem Marin Alloy, 35mm
Headset FSA No. 10P
Seatpost Marin Alloy, 30.9mm
Saddle Marin Kids MTB
Pedals Kids Specific Nylon Pedal

* Subject to change without notice.