Marin San Quentin 20

2021 YouthMountain youth Manufacturer page

Marin San Quentin 20, color Gloss Blue / Green/black

Last known price: $689

Prices shown first for United States
Fork travel: 80 mm
Wheels: 20″
Drivetrain: 1 × 8 30t / 11–32t
Gear range: 291%
Frame: Aluminum
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

One Size 111.8–132.1

Components

15 of 21 identified

Parts found in a manufacturer catalog show their brand, model and key numbers, and the steps show how precisely they are identified: brand, series, model, or the exact product. The info button has every detail and the text the manufacturer published.

Frame and fork

1 part

Frame

Series 2 6061 Aluminum, 20” Wheels, Disc Specific, 135mm Dropouts Not identified

Suspension

1 part

Fork
- SR Suntour

Drivetrain

7 parts

Bottom bracket

Sealed Cartridge Bearings, Square Taper Not identified
Cassette
- Shimano 11–32t
Chain
- KMC X8 8 speeds
Crankset

Forged Alloy, Narrow Wide 30T, 140mm Not identified
Front derailleur

None
Rear derailleur
- Shimano Altus
Shifters
- microSHIFT

Brakes

2 parts

Brake levers
- Tektro
Brakes
- Tektro HD-J285
HD-J285

Wheels and tires

4 parts

Front hub

Forged Aluminum, 32H, Disc Specific Not identified
Rear hub

Forged Aluminum, 32H, Disc Specific Not identified
Rims
- Marin
Tires
- Vee Tire

Cockpit and contact points

7 parts

Grips
- Marin
Handlebar
- Marin
Headset
- FSA NO.57E
Pedals

Kids Specific Nylon Pedal Not identified
Saddle
- Marin
Seatpost
- Marin
Stem
- Marin

Sizes and geometry

1 size Open in the geometry plotter

Enter your height to highlight matching ranges.

Size One Size

Table

Reach 310mm

Stack 503mm

Wheelbase 913mm

Head angle 65.0°

Seat angle 75.0°

Every size is drawn to the same scale, in millimeters. Explanatory schematic on an assumed 20″ wheel; exact published values are in the table below.

Size Reported by the manufacturer

Complete manufacturer geometry table 1 published size

Complete manufacturer geometry by size
Measurement
Frame
Reachmm	310
Stackmm	502.5
Top tube lengthmm	444.6
Seat tube lengthmm	308
Head tube lengthmm	90
Head tube angle	65°
Seat tube angle	75°
Chainstay lengthmm	340
Wheelbasemm	912.9
Front centermm	573
Bottom bracket dropmm	10
Bottom bracket heightmm	259
Standover heightmm	534
Fork rakemm	40
Stack/reach ratio	1.62
Suspension and parts
Crank lengthmm	152
Handlebar widthmm	590
Stem lengthmm	35

Not published by the manufacturer: Trail, Front travel, Rear travel, Stem angle, Seatpost length and Dropper post travel.

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Aluminum

Suspension

Suspension configuration: Hardtail
Front travel: 80 mm

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 30
Largest chainring: 30
Rear sprockets: 8
Smallest sprocket: 11
Largest sprocket: 32
Lowest gear: 18.8 in
Highest gear: 54.6 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Fork spring: Coil
Tire width: 2.6″
Wheel material: Aluminum
Wheel size: 20″

Technical analysis

2 measures

How these figures sit among bicycles of the same class and model year. Context, not a ranking.

Lowest gear

18.8 gear inches

This value is within the central range for this class.

Cohort: Youth / Mountain youth Model year: 2021
Sample: 230 bicycles with this information
Coverage: 72.3% of the class

Highest gear

54.6 gear inches

This value is below the central range for this class.

Cohort: Youth / Mountain youth Model year: 2021
Sample: 230 bicycles with this information
Coverage: 72.3% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 7.2 km/h
Highest gear: 20.9 km/h

Total gear range 291%

Technical details and class reference

These speeds describe the gearing at the selected cadence, not how fast you can ride.
Calculated from published gear-inch values and their wheel-size assumptions.
These gearing values describe the bicycle, not a selected frame size.
A 100% range means one ratio; 500% means the highest ratio is five times the lowest.
For e-bikes, motor assistance cutoff is not represented.

Gear-inch range

Lower gear-inch values travel less distance per pedal revolution; higher values travel farther.

This bicycle: 18.8–54.6 gear inches
Class reference (p10–p90): 15.6–80.0 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Youth / Mountain youth Model year: 2021
Lowest gear: 230 bicycles with this information, 72.3% of the class
Highest gear: 230 bicycles with this information, 72.3% of the class

Lineup changes

The published facts that differ across this family's builds and from the same model a year earlier. Missing information never counts as zero.

Differences across 2021 builds

Differences across 2021 builds
Specification	This bicycle Marin San Quentin 20	Marin San Quentin 1	Marin San Quentin 2	Marin San Quentin 24	Marin San Quentin 3
Suspension
Front travel	80 mm	120 mm	130 mm	100 mm	130 mm
Drivetrain
Smallest chainring	30	32	32	30	32
Largest chainring	30	32	32	30	32
Rear sprockets	8	9	11	9	12
Smallest sprocket	11	11	11	11	10
Largest sprocket	32	46	51	46	51
Lowest gear	18.8 in	19.1 in	17.3 in	15.7 in	17.3 in
Highest gear	54.6 in	80.0 in	80.0 in	65.5 in	88.0 in
Cockpit
Seatpost	Rigid seatpost	Rigid seatpost	Dropper seatpost	Rigid seatpost	Dropper seatpost
Other specifications
Fork spring	Coil	Coil	Not informed	Air	Air
Tire width	2.6″	2.6″	2.6″	2.6″	2.5″
Wheel size	20″	27.5″	27.5″	24″	27.5″
Bottom bracket standard	Not informed	BSA	BSA	Not informed	BSA