Marin Alcatraz 2024 Frame Kit
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We have done our best to sufficiently estimate demand. Please contact us if you have a question or wish to check availability.
Details
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.
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.
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.
The Alcatraz features 135×10mm horizontal dropouts — the standard in dirt jump technology for axle and dropout strength.
Slopestyle
Pump track
Skate park
Specification
Frame | Series 3 6061 Aluminum Frame, 26” Wheels, 135×10mm Horizontal Dropouts, 73mm Threaded BB, ISCG 05 Tabs |
HEADSET | FSA No 57E, Semi-Sealed Cartridge Bearings, 1 1/8” × 1 1/2” |
Extras | Marin Chain Tension Device |
Extras | Marin MTB Seat Clamp, Bolt Type |
Specifications are subject to change without notice
Geometry

Frame Size | Short | Long |
A – Stack | 575 | 580 |
B – Reach | 385 | 430 |
C – Headtube Angle | 69° | 69° |
D – Headtube Length | 115 | 120 |
E – Seattube Angle | 69° | 69° |
F – Seattube Length | 320 | 320 |
G – Toptube Effective | 600 | 646 |
H – BB Height | 317 | 317 |
I – BB Drop | 22 | 22 |
J – Chainstay | 395 | 395 |
K – Wheelbase | 1037 | 1083 |
L – Standover Height | 370 | 400 |
M – Fork Offset | 42 | 42 |
Seatpost Diameter | 30.9 | 30.9 |
Handlebar Width | 750 | 750 |
Stem Length | 40 | 40 |
Crank Length | 170 | 170 |
Want to compare the size of your current bike to this one? Read our Reach and Stack guide here.
Manufacturer | Marin |
---|---|
RRP | No |