Double Your Ride Receive A FREE* Second Battery With The Purchase of Select Marin eMTBs! Learn More

Alcatraz Frame Kit

2022 Alcatraz Frame Color

See this bike in a different color:

  • Wheel Size : 26"
  • Frame: Aluminum
  • Size Range: Short, Long





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, 26” Wheels, 135x10mm Horizontal Single Speed Dropouts, 73mm Threaded BB, ISCG 05 Tabs

  • Headset

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

  • Extras

    Marin Chain Tension Device

  • Extras

    Marin MTB Seat Clamp, Bolt Type

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


Alcatraz Frame Kit geometry diagram
Short Long
Stack 575 580
Reach 385 430
Head Tube Angle 69° 69°
Head Tube Length 115 120
Seat Tube Angle 69° 69°
Seat Tube Length 320 320
Top Tube Effective 600 646
BB Height 317 317
BB Drop 22 22
Chain Stay 395 395
Wheel Base 1037 1083
Stand Over Height 370 400
Fork Offset 42 42

All lengths in millimeters