Marin Alcatraz 24"

2026 MountainDirt jump Manufacturer page

Last known price: $979

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

Rider height by size (cm)

Size guide

OS 120+

Components

13 of 20 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, 24” Wheels, 135x10mm Horizontal Dropouts, 73mm Threaded BB, ISCG 05 Tabs Not identified

Suspension

1 part

Fork
- Marin

Drivetrain

4 parts

Bottom bracket

External Sealed Cartridge Bearings Not identified
Cassette

14T Single Speed Cog Not identified
Chain
- KMC
HL-1
Crankset
- Marin 32t

Brakes

2 parts

Wheels and tires

5 parts

Front hub

Forged Alloy, Bolt On 3/8t" Axle, 100mm Spacing Not identified
Rear hub

Forged Alloy, 135x10mm, Bolt-On, Quad Sealed Bearings, Disc, 32H Not identified
Rims
- Marin
Spokes

14g Black Stainless Steel Not identified
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 OS

Table

Reach 360mm

Stack 526mm

Wheelbase 973mm

Head angle 69.0°

Seat angle 72.0°

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	360
Stackmm	526
Top tube lengthmm	531
Seat tube lengthmm	280
Head tube lengthmm	110
Head tube angle	69°
Seat tube angle	72°
Chainstay lengthmm	369
Wheelbasemm	973
Front centermm	604
Bottom bracket dropmm	12
Bottom bracket heightmm	331
Standover heightmm	370
Fork rakemm	44
Trailmm	85
Stack/reach ratio	1.46
Suspension and parts
Crank lengthmm	155
Handlebar widthmm	750
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: Steel

Suspension

Suspension configuration: Rigid

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
Tire width: 2.25″
Travel: Front: Additional specification: Not available: Yes
Wheel material: Aluminum
Wheel size: 26″

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.

Differences across 2026 builds
Specification	This bicycle Marin Alcatraz 24"	Marin Alcatraz 1	Marin Alcatraz 2
Frame
Fork material	Steel	Steel	Not informed
Suspension
Suspension configuration	Rigid	Rigid	Hardtail
Front travel	Not informed	Not informed	100 mm
Brakes
Brake type	Hydraulic disc	Hydraulic disc	Not informed
Other specifications
Suspension	Rigid	Rigid	Hardtail
Fork spring	Not informed	Not informed	Coil

Changes since 2025
Specification	2025 Marin Alcatraz 24"	This bicycle Marin Alcatraz 24"
Brakes
Brake type	Mechanical disc	Hydraulic disc
Other specifications
Travel	Configuration: RigidFront: Additional specification: Not available: YesRear: Additional specification: Not available: Yes	Configuration: RigidFront: Additional specification: Not available: Yes