Bike-on-Bike
Default Config
Default Config
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 | 575mm | 563mm -12mm |
Reach | 385mm | 415mm +30mm |
Stack to Reach Ratio | 1.49:1 | 1.36:1 |
Seat Tube Length, C-T | — | 335mm |
Seat Tube Length, Unknown | 320mm | — |
Top Tube Length, Effective/Horizontal Center | 600mm | 598mm -2mm |
Top Tube Slope | 28.9deg | 25.2deg -3.7deg |
Head Tube Angle | 69deg | 68.5deg -0.5deg |
Seat Tube Angle | 69deg | 72deg +3deg |
Head Tube Length | 115mm | 115mm +0mm |
Bottom Bracket Drop | 22mm | 22mm +0mm |
Bottom Bracket Height | 315.9mm | 310.8mm -5.1mm |
Chainstay Length | 395mm | 385mm -10mm |
Chainstay Length Horizontal | 394.4mm | 384.4mm -10mm |
Front-Center | 643mm | 668mm +25mm |
Front-Center Horizontal | 642.6mm | 667.6mm +25mm |
Wheelbase | 1037mm | 1052mm +15mm |
Fork Offset/Rake | 42mm | 37mm -5mm |
Fork Length, Unknown | — | 480mm |
Trail | 84.7mm very high | 91.3mm +6.6mm very high |
Mechanical Trail | 79.1mm | 85mm +5.9mm |
Wheel Flop | 28.4mm | 31.2mm +2.8mm |
Standover Height | 370mm | 691mm +321mm |
Tire to Pedal Spindle | 135.1mm 170 mm cranks | 165.2mm +30.1mm 170 mm cranks |
Pedal Spindle to Ground Clearance | 145.9mm 170 mm cranks | 140.8mm -5.1mm 170 mm cranks |
Build
Wheel Size | 26 in 559 mm BSD | 26 in 559 mm BSD |
Tire Width | 2.3in | 2.1in -0.2in |
Tire Outer Diameter | 675.8mm | 665.7mm -10.2mm |
Bike Length with Tires | 1712.8mm | 1717.7mm +4.9mm |
| Suspension Type | Hardtail (Front suspension) | Hardtail (Front suspension) |
| Bar Type | BMX Bar | Flat Bar |
| Fork Travel | Unknown | Unknown |
| Rear Travel | Unknown | Unknown |
| Suspension Sag | Unknown | Unknown |
| Frame Material | Aluminum | Unknown |
| Fork Material | Unknown | Unknown |
| Brake Type | Disc | Unknown |
Meta
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| Source | https://www.marinbikes.com/ww/bikes/2022-alcatraz-frame-kit | https://www.specialized.com/us/en/p3/p/217046?color=350163-217046&searchText=91923-6126 |
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