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2021 Marin Alcatraz profile.

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  • Suspension: X-Fusion Slant RL2 26"
  • Wheel Size : 26"
  • Frame: Aluminum
  • Size Range: One Size





The Alcatraz allows the rider to follow in Matt Jones’ footsteps to build and personalize the best dirt jump bike possible. At home boosting your local 6 pack, ripping up the pump track, or hitting the local skate park the Alcatraz has what you need to take care of business.


  • Frame

    Series 3 6061 Aluminum Frame, 26” Wheels, 135x10mm Horizontal Dropouts, 73mm Threaded BB, ISCG 05 Tabs

  • Front Suspension

    X Fusion Slant RL2 26", 100mm Travel, 100x15mm Thru-Axle, Air Spring, Compression and Rebound Adjust, Tapered Alloy Steerer tube, 40mm Offset

  • Rear Suspension


  • Rims

    Marin Custom Extrusion, 27mm Inner, Pinned Joint

  • Hub, Rear

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

  • Hub, Front

    Forged Alloy, 100x15mm, 32H

  • Spoke, Nipples

    14g Black Stainless Steel

  • Tires

    Vee Tire, XCV 26x2.25”, LSG Compound, Wire Bead

  • Derailleur, Rear


  • Derailleur, Front


  • Shift Lever


  • Crankset

    Marin Forged Alloy, Alloy 32T Chainring, 104mm BCD

  • Bottom Bracket

    External Sealed Cartridge Bearings

  • Chain

    KMC HL-710

  • Cassette

    14T Single Speed Cog

  • Brake, Front

    Tektro HDM275 Hydraulic Disc Brake, 160mm Rotor

  • Brake, Rear

    Tektro HDM275 Hydraulic Disc Brake, 160mm Rotor

  • Brake Levers

    Tektro HDM275

  • Handlebar

    Marin Riser, 6061 Double Butted Aluminum, 38mm Rise, 750mm Width, 4º Up, 9º Back

  • Stem

    Marin 3D Forged Alloy, 40mm

  • Grips

    Marin Single Clamp Locking

  • Headset

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

  • Seatpost

    Marin Pivotal DJ, 30.9mm

  • Saddle

    Marin Pivotal DJ Saddle

  • Pedals

    Alloy Platform

  • Extras

    Marin Chain Tension Device

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


Alcatraz geometry diagram
Stack 575.5
Reach 401.84
Headtube Angle 69°
Headtube Length 115
Seattube Angle 71°
Seattube Length 320
Toptube Effective 600
BB Height 317
BB Drop 22
Chainstay 395
Wheelbase 1053.68
Standover Height 650
Fork Offset 42
Seatpost Diameter 30.9
Handlebar Width 780
Stem Length 35
Crank Length 170

All lengths in millimeters

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