Marin Bikes

Alcatraz Frame Kit

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Alcatraz frame kit profile.

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  • Price: $549.00 (USD)*
  • Wheel Size : 26"
  • Frame: Aluminum
  • Size Range: Short, Long

Manufacturer’s suggested retail price may not include additional shipping or preparation charges. Please contact your local Marin dealer for a quote.

DIRT JUMPS

SLOPESTYLE

PUMP TRACK

SKATE PARK

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.

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Specifications

  • 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.

Geometry

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

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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