2021 Marin Bikes Alcatraz Base ONE SIZE
Build
26 in × 2.25 in
Insights
Very upright stack and reach vs trend of bmx/dirt jump bikes
Suspension sag unknown
Geometry may mis-represent actual riding geometry
Stack and Reach vs. Category Trend
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Geometry
| Stack | 575.5mm |
| Reach | 401.8mm |
| Stack to Reach Ratio | 1.43:1 |
| Seat Tube Length, C-T | 320mm |
| Top Tube Length, Effective/Horizontal Center | 600mm |
| Top Tube Slope | 28.3deg |
| Head Tube Angle | 69deg |
| Seat Tube Angle | 71deg |
| Head Tube Length | 115mm |
| Bottom Bracket Drop | 22mm |
| Bottom Bracket Height | 314.7mm |
| Chainstay Length | 395mm |
| Chainstay Length Horizontal | 394.4mm |
| Front-Center | 659.7mm |
| Front-Center Horizontal | 659.3mm |
| Wheelbase | 1053.7mm |
| Fork Offset/Rake | 42mm |
| Trail | 84.2mm very high |
| Mechanical Trail | 78.6mm |
| Wheel Flop | 28.2mm |
| Standover Height | 650mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 153mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 144.7mm |
Base Build
| Wheel Size | 26 inch (559mm BSD) |
| Tire Width | 2.25in |
| Tire Outer Diameter | 673.3mm |
| Bike Length with Tires | 1727mm |
| Crank Length | 170mm |
| Handlebar Width | 780mm |
| Stem Length | 35mm |
| Suspension Type | Hardtail (Front suspension) |
| Bar Type | Moto/Klunker/Riser Bar |
| Fork Travel | 100mm |
| Suspension Sag | Unknown |
| Frame Material | Aluminum |
| Fork Material | Unknown |
| Brake Type | Disc |
| Features | Single-speed capable |
Source:https://www.marinbikes.com/bikes/2021-alcatraz