Marin Alcatraz 2 Frame - Cyan/Magenta
Marin Alcatraz 2 Frame - Cyan/Magenta
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The Alcatraz was designed from the ground up to be the best dirt jump hardtail you have ever ridden. Marin worked hand-in-hand with Matt Jones to define the exact needs of a modern dirt jump frame. The 6061 aluminum frame is stiff and overbuilt for abuse, with a tapered headtube and 135x10mm horizontal dropouts.
DIRT JUMPS
SLOPESTYLE
PUMP TRACK
SKATE PARK
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.
Series 3 Aluminium 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.
Short Chainstays
Marin 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.
135x10mm Horizontal Dropouts
The Alcatraz features 135x10mm horizontal dropouts — the standard in dirt jump technology for axle and dropout strength.
| SHORT | LONG | |
| A STACK | 575 | 580 |
| B REACH | 385 | 430 |
| C HEAD TUBE ANGLE | 69° | 69° |
| D HEAD TUBE LENGTH | 115 | 120 |
| E SEAT TUBE ANGLE | 69° | 69° |
| F SEAT TUBE LENGTH | 320 | 320 |
| G TOP TUBE EFFECTIVE | 600 | 646 |
| H BB HEIGHT | 317 | 317 |
| I BB DROP | 22 | 22 |
| J CHAIN STAY | 395 | 395 |
| K WHEEL BASE | 1037 | 1083 |
| L STAND OVER HEIGHT | 370 | 400 |
| M FORK OFFSET | 42 | 42 |
Size Guide
Choosing the right size dirt jumper isn't quite as straightforward as other bikes. The right size for you is based off a combination of height and riding style. If you are looking for quick handling in tight spaces like a skatepark you may prefer a smaller size. For those looking for stability in pump tracks, slalom and other scenarios, the long option may suit your needs better. A rough guide for sizing can be seen below:
Short: 5'1" - 5'9"
Long: 5'9" to 6'3"