Bike-on-Bike
ONE SIZE
Ridden
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
Somewhat upright stack and reach vs trend of bmx/dirt jump bikes
Suspension sag unknown
Geometry may mis-represent actual riding geometry
Geometry
Stack | 575.5mm | 563mm -12.5mm |
Reach | 401.8mm | 415mm +13.2mm |
Stack to Reach Ratio | 1.43:1 | 1.36:1 |
Seat Tube Length, C-T | 320mm | 335mm +15mm |
Top Tube Length, Effective/Horizontal Center | 600mm | 598mm -2mm |
Top Tube Slope | 28.3deg | 25.2deg -3.1deg |
Head Tube Angle | 69deg | 68.5deg -0.5deg |
Seat Tube Angle | 71deg | 72deg +1deg |
Head Tube Length | 115mm | 115mm +0mm |
Bottom Bracket Drop | 22mm | 22mm +0mm |
Bottom Bracket Height | 314.7mm | 314.7mm +0mm |
Chainstay Length | 395mm | 385mm -10mm |
Chainstay Length Horizontal | 394.4mm | 384.4mm -10mm |
Front-Center | 659.7mm | 668mm +8.3mm |
Front-Center Horizontal | 659.3mm | 667.6mm +8.3mm |
Wheelbase | 1053.7mm | 1052mm -1.7mm |
Fork Offset/Rake | 42mm | 37mm -5mm |
Fork Length, Unknown | — | 480mm |
Trail | 84.2mm very high | 92.8mm +8.6mm very high |
Mechanical Trail | 78.6mm | 86.4mm +7.8mm |
Wheel Flop | 28.2mm | 31.7mm +3.5mm |
Standover Height | 650mm | 694.8mm +44.8mm |
Tire to Pedal Spindle | 153mm 170 mm cranks | 161.4mm +8.4mm 170 mm cranks |
Pedal Spindle to Ground Clearance | 144.7mm 170 mm cranks | 144.7mm +0mm 170 mm cranks |
Build
Wheel Size | 26 in 559 mm BSD | 26 in 559 mm BSD |
Tire Width | 2.25in | 2.25in +0in |
Tire Outer Diameter | 673.3mm | 673.3mm +0mm |
Bike Length with Tires | 1727mm | 1725.3mm -1.7mm |
Crank Length | 170mm | — |
Handlebar Width | 780mm | — |
Stem Length | 35mm | — |
| Suspension Type | Hardtail (Front suspension) | Hardtail (Front suspension) |
| Bar Type | Moto/Klunker/Riser Bar | Flat Bar |
| Fork Travel | 100mm | Unknown |
| Rear Travel | Unknown | Unknown |
| Suspension Sag | Unknown | Unknown |
| Frame Material | Aluminum | Unknown |
| Fork Material | Unknown | Unknown |
| Brake Type | Disc | Unknown |
| Features | Single-speed capable | — |
Meta
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| Source | https://www.marinbikes.com/bikes/2021-alcatraz | https://www.specialized.com/us/en/p3/p/217046?color=350163-217046&searchText=91923-6126 |
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