Marin Bikes | 2025 Alcatraz Jr.

Marin Bikes | 2025 Alcatraz Jr.Size Guide Built for young riders who want to send jumps, learn tricks, and ride pump tracks with confidence and style. The Marin Alcatraz JR 24 is a purpose built dirt jump bike designed specifically for younger riders looking to progress their skills in dirt jumping, skateparks, pump tracks, and urban freestyle riding. Built around a lightweight Series 3 aluminum frame with compact 24 inch wheels, the Alcatraz JR delivers responsive handling,

and the Karoo stands as one of the most complete and refined cycling computers available today

Suitable for aggressive trail riding

5° 430mm 1165mm 678mm LG 637mm 485mm 65

and dirt jump-specific geometry

and high-speed trail sections

• Beyond Road GeometryStable and confidence-inspiring geometry suited for gravel

The Feedback Sports Velo Wall Rack 2D takes bike storage to the next level with horizontal and vertical arm adjustability

• Shimano Deore 1x12-Speed DrivetrainWide-range gearing with dependable shifting performance for climbing and technical riding

• MultiTrac LT Suspension Platform160mm rear travel paired with a 170mm fork provides exceptional descending capability while maintaining climbing efficiency

• Flared Drop HandlebarProvides improved control and comfort across rough roads and gravel terrain

• Single-Speed DrivetrainSimple and reliable setup with minimal maintenance and improved chain retention

• StemMarin CNC Stem