Marin Bikes

Alcatraz 24"

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Marin Alcatraz 24 profile.

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  • Price: $1,399*
  • Wheel Size: 24"
  • Frame: Aluminum
  • Size Range: One Size
  • Manufacturer’s suggested retail price may not include additional shipping or preparation charges. Please contact your local Marin dealer for a quote.

We've taken the Alcatraz 1 and scaled it down for smaller riders. Built upon the same tubing as the larger models, it features a 360mm reach, 69° headtube angle, and 72° seattube angle, with 369mm chainstays. A suspension-corrected rigid CrMo fork is designed to handle rough-and-rowdy riding, and a simple and stout single-speed drivetrain and Tektro mechanical disc brakes ensure a fun and safe ride.

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Specifications

  • Frame

    Series 3 6061 Aluminum, 24” Wheels, 135x10mm Horizontal Single Speed Dropouts, 73mm Threaded BB, ISCG 05 Tabs

  • Front Suspension

    Marin Series 2 CroMo 24", Suspension Corrected, 100x9mm Dropouts

  • Rear Suspension

    -

  • Rims

    Marin Custom Extrusion, 27mm Inner, Pinned Joint

  • Hub, Rear

    Forged Alloy, 135x10mm, Bolt-On, Quad Sealed Bearings, Disc, 32H

  • Hub, Front

    Forged Alloy, Bolt On 3/8" Axle, 100mm Spacing

  • Spokes

    14g Black Stainless Steel

  • Tires

    Vee Tire, Rail 24x2.25”, LSG Compound, Wire Bead

  • Derailleur, Rear

    -

  • Derailleur, Front

    -

  • Shift Lever

    -

  • Crankset

    Marin Forged Alloy, Alloy 32T DM Chainring, 155mm Length

  • Bottom Bracket

    External Sealed Cartridge Bearings

  • Chain

    KMC HL-1

  • Cassette

    14T Single Speed Cog

  • Brake, Front

    Tektro MD-M280 Mechanical Disc 160mm Rotor

  • Brake, Rear

    Tektro MD-M280 Mechanical Disc 160mm Rotor

  • Brake Levers

    Tektro CL-330TS Alloy

  • Handlebar

    Marin Riser, 6061 Double Butted Aluminum, 31.8mm at center bulge, 38mm Rise, 700mm Width, 4º Up, 9º Back

  • Stem

    Marin 3D Forged Alloy, 31.8mm clamp, 35mm extension

  • Grips

    Marin MTN, Closed End

  • Headset

    FSA No 57E, Semi-Sealed Cartridge Bearings, 1 1/8" x 1 1/2”

  • Seatpost

    Marin Alloy, 30.9mm

  • Saddle

    Marin DJ Saddle

  • Pedals

    Alloy Platform

  • Extras

    Marin Chain Tension Device

Specifications, pricing, and availability are subject to change without notice.

Geometry

Alcatraz 24" geometry diagram
Short
Stack 525
Reach 360
Headtube Angle 69°
Headtube Length 112
Seattube Angle 69°
Seattube Length 320
Toptube Effective
BB Height
BB Drop 8mm
Chainstay 369
Wheelbase
Standover Height
Fork Offset 42
Seatpost Diameter 30.9
Handlebar Width 700
Stem Length 35
Crank Length 152

All lengths in millimeters

Technology

Marin Alcatraz headtube image

SERIES 3 ALUMINUM FRAME

The Alcatraz features a 6061 Series 3 alloy frame, with a burly double butted tubesets for the best ride quality and stiffness, tapered headtubes for maximum strength on big jumps, and horizontal drop out with slotted IS disc brake tabs.

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Marin Series 3 aluminum decal on the Alcatraz chainstay

SHORT CHAINSTAYS

We have optimized the chainstay length of the Alcatraz to make sure you can have the shortest chainstays possible, giving you the ability to pop a wheelie or manual anywhere at anytime.

Rear dropout and brake image of the Marin Alcatraz

135X10MM HORIZONTAL DROPOUTS

The Alcatraz features 135x10mm horizontal dropouts — the standard in dirt jump technology for axle and dropout strength.

Front 3/4 view of the Marin Alcatraz

DIRT JUMP SPECIFIC SUSPENSION FORK

100mm travel X-Fusion Slant DJ-specific fork with air spring, compression and rebound damping, and tapered alloy steerer tube.

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