Alcatraz Frame Kit

Alcatraz frame kit profile.

See this bike in a different color:

  • Frame: Aluminium
  • Size Range: Short, Long





The Series 3 aluminum frame is built for the hard knocks and is stiff enough for lightning-fast acceleration and tough enough for the heavy hits. Short stays keep manuals easy and ambidextrous cable routing means you can run your brake on the left or right of the bars.

The Main Alcatraz frame kit comes supplied with an FSA headset, Marin chain tension device and Marin seat clamp. Available in two frame sizes, regular and long.


  • 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

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