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2023 Marin

San Quentin 20"

A 20″ aluminum frame mountain youth bike with modest components and tektro hydraulic disc brakes.
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Manufacturer Price

$699
FrameAluminum
SuspensionHardtail, 80mm
ForkSuntour XCM
Wheels20″ Aluminum
Drivetrain1 × 8
GroupsetAltus
BrakesTektro Hydraulic Disc
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Insights
Ride Feel

Based on frame geometry and build specs.

Handling
nimblestable
San Quentin 20"
Other Mountain Youth bikes
Gearing

A bike with lower gearing will be easier to ride up steep hills, while a higher top end means it will pedal faster down hills.

Lowest gear

(climbing)

16 mph

San Quentin 20"

Highest gear

(descending)

Spec Level

Based on build material and quality level of the frame, fork, wheelset, groupset, suspension system, and more.

Sizing
One Size

3'8" – 4'5"

Rider Fit Notes

None yet.

Do you have this bike? Help other riders make a decision about which size will work for them by sharing your own size and fit notes.

Reviews
99 Spokes
Testing the New 29" Marin San Quentin!

Oct 2023

Riders have been asking Marin to release a 29" version of their flagship hardtail, the San Quentin, for years, and they finally did!

Watch Review

MBR
The Marin San Quentin 1 is the most progressive hardtail I've ever tested, but a few compromises stop it reaching full potential - MBR

May 2024 · Danny Milner

If you’re looking for a radical hardtail, at a down-to-earth price, one bike stands head and shoulders above the rest. That bike is the Marin San Quentin. Clearly inspired by the dirt jump bikes ridden by Marin-sponsored Matt Jones, and with a hint of Sick Bicycles (remember them?) about it, the low-slung top tube and steep seat angle scream style and amplitude, while the slack head angle and generous sizing look primed for high-speed bombing. Marin San Quentin 1 need to know Alloy frame with low standover and progressive geometry SR Suntour XCM34 fork with 130mm of travel 1x drivetrain with 9-speed Sunrace cassette and MicroShift transmission Fixed seat post, but frame is dropper post-ready It comes with 27.5in wheels with big volume Vee Snap tires, which I know from testing the Calibre Line T3-27 and other plus bikes, is a surefire way of introducing comfort and composure to the ride of any hardtail. The fork is only 130mm in travel, so there are no radical swings in geometry as the fork compresses, causing unpredictable handling. Sounds like Marin has all its ducks in a row. So, why doesn’t the San Quentin deserve a place among the best hardtails currently on sale? Frame and geometry Marin has really gone out on a limb with the San Quentin’s 6061 T6 double-butted alloy frame. It has perhaps the most progressive styling and geometry of any hardtail under £1,000 (maybe even more), and (from a distance) looks more like a boutique, hand-crafted, hardcore hardtail that you’d see somewhere like the Bespoked show, than a mass-produced model. The hallmarks of the small volume, boundary-pushing, backyard bike builder-look start with the knee height top tube, offering acres of standover clearance for chucking the bike around in the air and on the ground. Then there’s the steep 77º seat angle, aping modern enduro bikes to improve climbing, and allow Marin to tuck the rear wheel in obscenely tight for maximum agility. Up front, the head tube reclines lazily forward at 64º in a chopper-like stance. But, as soon as you stand on the bike to descend, and your weight moves forward – compressing the fork, and steepening the head tube – this extreme angle makes complete sense, keeping the steering stable and controllable at speed. For a final flourish, there are swoopy, curved seat stays, designed to encourage flex and compliance. The San Quentin’s utilities (brake hose and gear cable) are mostly routed through the frame, entering behind the head tube and exiting at the bottom bracket, before continuing to their final destinations externally and held by cable ties. Marin has made a good job of this, and the cables are secure and silent inside the frame. Although it doesn’t come with one, there’s a port at the base of the seat tube to allow the installation of a dropper post. Given the compact frame, Marin has only been able to add a single bottle cage mount on the down tube. At the bottom bracket, there …Continue reading »

Highs
  • • Progressive frame offers loads of room to get loose

  • • Slack head angle increases stability and confidence on descents

  • • Fun, agile handling

  • • Loves to get airborne

Lows
  • • Clunky coil fork lacks support and adjustability

  • • Constant risk of slipped gears from the drivetrain

  • • Tyres are vague and unpredictable in corners

  • • Square-taper cranks won’t last long

Read Review

NSMB
The $1100 (USD) Marin San Quentin 1 Hardtail

Sep 2022

The complete Marin San Quentin 1 (SQ1) hardtail costs about the same amount of money as a top-end RockShox suspension fork and it's a fun choice for the aspiring or casual mountain biker looking for a budget-friendlier gateway rig for Blue-level trails.

Highs
  • Great handling, confidence-inspiring bicycle

  • Solid geometry

  • MicroShift drivetrain is durable and good shifting for the price

  • Tektro M275 brakes reliable and easy-to-bleed

  • Marin-branded i29 rims and handlebar are solid choices

  • Easy tubeless setup

Lows
  • Crankset is the main complaint

  • Fork is basic, heavy, and not adjustable

  • Tires suitable for dry conditions only, would need upgrade for wet

  • No dropper post included

  • Size range lacks XS and XXL, reach and stack could be longer/taller

  • Chainstays are not size-specific

  • Chain dropped twice due to chainring

Read Review

Mountain Bike Action
Mountain Bike Action Bike Test: Marin San Quentin 3 Trail Bike

Nov 2020 · McCoy

Tough as Nails

Read Review

Geometry
Specs
Build
Frame

Series 2 6061 Aluminum, 20” Wheels, Disc Specific, 135mm Dropouts

ColorGloss Blue / Green/black

Fork

SR/Suntour XCM 24 Boost, 80mm Travel, 110mm Axle Spacing

Travel80mm

Spring TypeCoil

Bottom Bracket

Sealed Cartridge Bearings, Square Taper

Headset

FSA No. 57E

Stem

Marin Alloy, 35mm

Handlebar

Marin Riser, 31.8 clamp, 30mm Rise, 590mm Width

Saddle

Marin Kids MTB

Seatpost

Marin Alloy, 30.9mm

TypeRigid

Pedals

Kids Specific Nylon Pedal

Grips

Marin MTB

Groupset
Rear Derailleur

Shimano Altus

Front Derailleur

-

Crank

Forged Alloy, Narrow Wide 30T, 140mm

Shifters

Shimano Altus SL-M315, 8-Speed

Cassette

Shimano 8-speed, 11-32T

Chain

KMC Z8

Brakes

Tektro HD-J285 Kid's Specific Hydraulic Disc

TypeTektro Hydraulic Disc

Brake Levers

Tektro Kid's Specific Short Reach Lever for Hydraulic Brake

Wheels
Rims

Marin, Double Wall Alloy, 25mm Internal

Front Hub

Forged Aluminum, 32H, Disc Specific

Rear Hub

Forged Aluminum, 32H, Disc Specific

Tires

Vee Tire Co. Crown Gem, 20x2.6”, Wire Bead

Rider Notes
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First added July 17

Last updated September 16

Not listed for 975 days