Marin Alcatraz 1 2025

The Alcatraz 1 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 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. There’s a suspension-corrected CrMo fork, front and rear Tektro disc brakes, Vee Tire rubber and plenty of bombproof Marin components. Best of all, it’s available in two frame sizes, regular and long.

Specifications

Frame
Series 3 6061 Aluminum, 26” Wheels, 135x10mm Horizontal Single Speed Dropouts, 73mm Threaded BB, ISCG 05 Tabs

Fork
Marin Series 2 CroMo 26", Suspension Corrected, 100x9mm Dropouts

Rims
Marin Custom Extrusion, 27mm Inner, Pinned Joint

Hub, Rear
Forged Alloy, 135x10mm, Bolt-On, Quad Sealed Bearings, Disc, 32H

Hub, Front
Forged Alloy, Bolt On 3/8" Axle, 100mm Spacing

Spokes
14g Black Stainless Steel

Tires
Vee Tire Co. XCV 26x2.25”, LSG Compound, Wire Bead

Crankset
Marin Forged Alloy, Alloy 32T Chainring, 104mm BCD

Bottom Bracket
External Sealed Cartridge Bearings

Chain
KMC HL-1

Cassette
14T Single Speed Cog

Brake, Front
Tektro MD-M280 Mechanical Disc 160mm Rotor

Brake, Rear
Tektro MD-M280 Mechanical Disc 160mm Rotor

Brake Levers
Tektro CL-330TS Alloy

Handlebar
Marin Riser, 6061 Double Butted Aluminum, 31.8mm at center bulge, 38mm Rise, 750mm Width, 4º Up, 9º Back

Stem
Marin 3D Forged Alloy, 31.8mm clamp, 40mm extension

Grips
Marin MTN, Closed End

Headset
FSA No 57E, Semi-Sealed Cartridge Bearings, 1 1/8" x 1 1/2”

Seatpost
Marin Alloy, 30.9mm

Saddle
Marin DJ Saddle

Pedals
Alloy Platform

Extras
Marin Chain Tension Device