Marin Alcatraz

2021 MountainDirt jump Manufacturer page

Marin Alcatraz, color Gloss Magenta / Cyan/hi-Vis Yellow/black

Last known price: $1,579

Prices shown first for United States
Fork travel: 100 mm
Wheels: 26″
Drivetrain: 1 × 1 32t / 14t
Gear range: 100%
Frame: Aluminum
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

One Size 120+

Components

13 of 19 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 3 6061 Aluminum Frame, 26” Wheels, 135x10mm Horizontal Dropouts, 73mm Threaded BB, ISCG 05 Tabs Not identified

Suspension

2 parts

Fork
- X-Fusion
Rear shock

None

Drivetrain

7 parts

Bottom bracket

External Sealed Cartridge Bearings Not identified
Cassette

14T Single Speed Cog Not identified
Chain
- KMC
HL-710
Crankset
- Marin 32t
Front derailleur

None
Rear derailleur

None
Shifters

None

Brakes

2 parts

Wheels and tires

4 parts

Front hub

Forged Alloy, 100x15mm, 32H Not identified
Rear hub

Forged Alloy, 135x10mm, Bolt-On, Quad Sealed Bearings, 32H Not identified
Rims
- Marin
Tires
- Vee Tire

Cockpit and contact points

7 parts

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

Alloy Platform Not identified
Saddle
- Marin
Seatpost
- Marin
Stem
- Marin

Sizes and geometry

1 size Open in the geometry plotter

Complete rider-height ranges are not published for these sizes. You can still explore the geometry below.

Size One Size

Table

Reach 402mm

Stack 576mm

Wheelbase 1054mm

Head angle 69.0°

Seat angle 71.0°

Every size is drawn to the same scale, in millimeters. Explanatory schematic on an assumed 26″ 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	401.84
Stackmm	575.5
Top tube lengthmm	600
Seat tube lengthmm	320
Head tube lengthmm	115
Head tube angle	69°
Seat tube angle	71°
Chainstay lengthmm	395
Wheelbasemm	1053.68
Front centermm	660
Bottom bracket dropmm	22
Bottom bracket heightmm	317
Standover heightmm	650
Fork rakemm	42
Trailmm	87
Stack/reach ratio	1.43
Suspension and parts
Crank lengthmm	170
Handlebar widthmm	780
Stem lengthmm	35

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

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Aluminum
Fork material: Aluminum

Suspension

Suspension configuration: Hardtail
Front travel: 100 mm

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 32
Largest chainring: 32
Rear sprockets: 1
Smallest sprocket: 14
Largest sprocket: 14
Lowest gear: 59.4 in
Highest gear: 59.4 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Rigid seatpost
Shifting: No shifting

Additional specifications

Bottom bracket standard: BSA
Fork spring: Air
Tire width: 2.25″
Wheel material: Aluminum
Wheel size: 26″

Technical analysis

1 measure

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

Front travel

100 mm

This value is within the central range for this class.

Cohort: Mountain / Dirt jump Model year: 2021
Sample: 68 bicycles with this information
Coverage: 91.8% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 22.8 km/h
Highest gear: 22.8 km/h

Total gear range 100%

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: 59.4–59.4 gear inches

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.

Changes since 2020

Changes since 2020
Specification	2020 Marin Alcatraz	This bicycle Marin Alcatraz
Other specifications
Travel	Configuration: HardtailFront: Travel: 100 mm	Configuration: HardtailFront: Travel: 100 mmRear: Additional specification: Not available: Yes