Alcatraz Frame Kit 2026

The Marin Alcatraz is a pro-level dirt jump bike designed for pump tracks, trail jumps and skatepark sessions. Fast, tough and low-maintenance, it’s built for riders who want maximum boost with minimal fuss. Available here as a frameset for your own custom builds.

Contact us at [email protected] to discuss components or to arrange a full custom build

Key features 

• Series 3 6061 Aluminium Frame – Lightweight, strong and jump-ready

• Internal Cable Routing – Clean looks and reduced cable rattle

• 73mm BSA Bottom Bracket – Durable and easy to service

• Horizontal Dropouts with Integrated Chain Tensioners – Simple chain setup and secure rear wheel positioning

• ISCG 05 Tabs – Chain guide compatible for aggressive riding

SIZING - 

The Alcatraz 1 is available in Short and Long frame options, so you can choose the ride feel that suits your style:

• Short Frame – Responsive and playful, ideal for riders with BMX roots

• Long Frame – More stable at speed and better suited to riders 5’11” (180cm) and taller

SPECIFICATION - 

Frame - Series 3 6061 Aluminium, 26” Wheels, 135x10mm Horizontal Dropouts, 73mm Threaded BB, ISCG 05 Tabs
Headset - FSA No 57E, Semi-Sealed Cartridge Bearings, 1 1/8" x 1 1/2”