Alcatraz 1
Marin
Dirt Jump
Alcatraz 1 is an alloy dirt jump mountain bike (2025), by Marin, in the Alcatraz series. It is best suited to a wide range of riders thanks to its fit flexibility, with a balanced riding position, with a surface profile that is more at home in gravity-focused bike park riding. Standout strengths from the metrics include strong value-for-money versus many similar bikes, good fit flexibility for dialing in rider position, and balanced, versatile speed for everyday riding. The trade-off to keep in mind is more of a flat-to-rolling terrain bias than a climbing focus and a setup that favors simplicity and efficiency over plush bump absorption. Use MatchBikes.com to compare this bike with nearby dirt jump options.
Rating

Score Summary
Performance
Built for speed and efficiency
Fit
Dialed-in Fit & Comfort
Value
Specifications
General
Frame
Drivetrain
Wheels
Brakes
Cockpit
Seat
Geometry
| Measurement | Short | Long |
|---|---|---|
| Stack Reach Ratio | 1.494 mm | 1.349 mm |
| Bottom Bracket Height | 317 mm | 317 mm |
| Front Center | 643 mm | 689 mm |
| Rake | 42 mm | 42 mm |
| Trail | 87 mm | 88 mm |
| Stack | 575 mm | 580 mm |
| Reach | 385 mm | 430 mm |
| Top Tube Length | 600 mm | 646 mm |
| Seat Tube Angle | 69 ° | 69 ° |
| Seat Tube Length | 320 mm | 320 mm |
| Head Tube Angle | 69 ° | 69 ° |
| Head Tube Length | 115 mm | 120 mm |
| Chainstay Length | 395 mm | 395 mm |
| Wheelbase | 1037 mm | 1083 mm |
| Bottom Bracket Drop | 22 mm | 22 mm |
| Standover Height | 370 mm | 400 mm |
| Wheels | 26" | 26" |




























































