Marin Bikes | 2025 Alcatraz 1

📏Size Guide

An affordable gateway into dirt jumping, pump tracks, and freestyle MTB riding without sacrificing the geometry and attitude the Alcatraz line is known for.

The Marin Alcatraz 1 is a purpose-built dirt jump bike designed for riders looking to get into jumps, pump tracks, skateparks, and urban freestyle riding. Built around Marin’s proven Series 3 aluminum dirt jump frame and compact 26-inch wheel platform, the Alcatraz 1 delivers responsive handling, durability, and playful control for progressing riders.

With a rigid chromoly fork, single-speed drivetrain, mechanical disc brake, and dirt jump-specific geometry, the Alcatraz 1 keeps things simple, reliable, and ready for sessions at the local jump line or skatepark.

Key Features

• Series 3 Aluminum Dirt Jump Frame
Lightweight and durable aluminum frame with horizontal dropouts and dirt jump geometry.

• 26-Inch Wheel Platform
Responsive wheel size optimized for jumps, manuals, and technical freestyle riding.

• Rigid Cro-Mo Fork
Suspension-corrected chromoly fork built for direct handling and durability.

• Single-Speed Drivetrain
Simple low-maintenance drivetrain with strong chain retention for aggressive riding.

• Mechanical Disc Brake
Reliable rear braking performance with easy maintenance.

• Dirt Jump Geometry
Compact geometry improves agility, control, and confidence in the air.

• Wide Riser Handlebar
Improves leverage and bike handling during jumps and tricks.

Technical Specifications

• Category
Dirt Jump Bike

• Discipline
MTB / Urban

• Frame
Series 3 6061 Aluminum, 26” Wheels, 135x10mm Horizontal Dropouts, ISCG05 Tabs

• Fork
Marin Series 2 Cro-Mo 26" Fork

• Bottom Bracket
External Sealed Cartridge Bearings

• Headset
FSA No 57E Semi-Sealed Cartridge Bearings

• Crankset
Marin Forged Alloy, 32T Chainring, 170mm

• Cassette
14T Single-Speed Cog

• Chain
KMC HL-1

• Brakes
Tektro MD-M280 Mechanical Disc Brake

• Brake Rotors
160mm

• Wheelset
Marin Custom Extrusion, 27mm Inner Width

• Front Hub
Forged Alloy, Bolt-On Axle, 100mm Spacing

• Rear Hub
Forged Alloy, 135x10mm Bolt-On, Quad Sealed Bearings

• Tires
Vee Tire XCV 26x2.25"

• Handlebar
Marin Riser Alloy Bar

• Stem
Marin 3D Forged Alloy

• Seatpost
Marin Alloy, 30.9mm

• Saddle
Marin DJ Saddle

• Pedals
Alloy Platform

• Color Option
Blue Fade (#2F6BFF → #6FD3FF)

Geometry

Suitable for dirt jumps, pump tracks, skateparks, street riding, freestyle MTB riding, and urban jump sessions.