Marin Alcatraz 2021 - Jump Bike
The Alcatraz was designed from the ground up to be the best dirt jump hardtail you have ever ridden. We worked hand-in-hand with Matt Jones to define the exact needs of a modern dirt jump frame, and are proud to release the complete Alcatraz into the world. The 6061 aluminum frame is stiff and overbuilt for abuse, with a tapered headtube and 135x10mm horizontal dropouts with a chain tension device for either single speed or geared builds.
Occasionally, without notice, manufacturers change product design and/or specifications.
Frame | Series 3 6061 Aluminum Frame, 26” Wheels, 135x10mm Horizontal Dropouts, Single Speed or Geared |
Fork | X Fusion Slant RL2 26", 100mm Travel, 100x15mm Thru-Axle, Air Spring, Compression and Rebound Adjust, Tapered Alloy Steerer tube, 40mm Offset |
Headset | FSA No 57E, Semi-Sealed Cartridge Bearings, 1 1/8" x 1 1/2” |
Stem | Marin 3D Forged Alloy, 40mm |
Bars | Marin Riser, 6061 Double Butted Aluminum, 38mm Rise, 750mm Width, 4º Up, 9º Back |
Front Brake | Tektro HDM275 Hydraulic, 180mm Rotor |
Rear Brake | Tektro HDM275 Hydraulic, 160mm Rotor |
Brake Lever | Tektro HDM275 |
Speed | 1 |
Rims | Marin Custom Extrusion, 29mm Inner, Pinned Joint |
Front Hub | Forged Alloy, 100x15mm, 6-bolt Disc, 32H |
Rear Hub | Forged Alloy, 135x10mm, Bolt On, Quad Sealed Bearings, 6-Bolt Disc, 32H |
Spokes | 14g Black Stainless Steel |
Front Tyre | Vee Tire, XCV 26x2.25, LSG Compound, Wire Bead |
Rear Tyre | Vee Tire, XCV 26x2.25, LSG Compound, Wire Bead |
Seat Post | Marin Pivotal DJ 30.9 Diameter 200mm length |
Saddle | Marin Pivotal DJ Saddle |
Chainset | Marin Forged Alloy, Alloy 32T Chainring, 104mm BCD, STD spacing |
Bottom Bracket | External Sealed Cartridge Bearings |
Chain | KMC HL-710 |
Cassette | 14T Single Speed Cog |
Pedals | Basic Resin Flat |
Jump Bike Size guide
Jump bikes are designed and intended for Dirt jumps, street and skatepark riding. Not for riding any distance.
They primarily use a 26” wheel with the frame only available in one size, to suit riders taller than 4’5” or 137cm.
Some manufacturers offer a long or short length bike. Riders over 5’10” or 178cm will prefer the longer option.
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