2022 Marin Bikes Alcatraz Base
- Category
- BMX/Dirt Jump
- Design
- BMX Bar, Hardtail (Front suspension)
- Frame
- Aluminum
- Features
- Disc brake
Geometry
SHORT | LONG | |
Stack | 575mm | 580mm |
Reach | 385mm | 430mm |
Stack to Reach Ratio | 1.49:1 | 1.35:1 |
Seat Tube Length, Unknown | 320mm | 320mm |
Top Tube Length, Effective/Horizontal Center | 600mm | 646mm |
Top Tube Slope | 28.9deg | 27.3deg |
Head Tube Angle | 69deg | 69deg |
Seat Tube Angle | 69deg | 69deg |
Head Tube Length | 115mm | 120mm |
Bottom Bracket Drop | 22mm | 22mm |
Bottom Bracket Height | 315.9mm | 315.9mm |
Chainstay Length | 395mm | 395mm |
Chainstay Length Horizontal | 394.4mm | 394.4mm |
Front-Center | 643mm | 689mm |
Front-Center Horizontal | 642.6mm | 688.6mm |
Wheelbase | 1037mm | 1083mm |
Fork Offset/Rake | 42mm | 42mm |
Trail | 84.7mm very high | 84.7mm very high |
Mechanical Trail | 79.1mm | 79.1mm |
Wheel Flop | 28.4mm | 28.4mm |
Standover Height | 370mm | 400mm |
Tire to Pedal Spindle | 135.1mm 170 mm cranks | 181mm 170 mm cranks |
Pedal Spindle to Ground Clearance | 145.9mm 170 mm cranks | 145.9mm 170 mm cranks |
Base Build
SHORT | LONG | |
Wheel Size | 26 in 559 mm BSD | 26 in 559 mm BSD |
Tire Width | 2.3in | 2.3in |
Tire Outer Diameter | 675.8mm | 675.8mm |
Bike Length with Tires | 1712.8mm | 1758.8mm |
Published Sizing Recommendations
Height | 5 ft 1 in to 5 ft 9 in | 5 ft 6 in to 6 ft 3 in |
Stack and Reach vs. Category Trend
Very Upright
Somewhat Upright
Average
Somewhat Aggressive
Very Aggressive
The Bike Insights Upright/Aggressive scale is based on analysis of a bike’s proportions relative to similar sized bikes in the same category.
Learn more about the Upright/Aggressive ScaleCategory Trend
BMX/Dirt JumpSource:https://www.marinbikes.com/ww/bikes/2022-alcatraz-frame-kit