Bike-on-Bike
Default Config
Default Config
Insights
Average stack and reach vs trend of all-road/gravel bikes
Design deviates from other sizes of Serk Titanium A21
Average stack and reach vs trend of all-road/gravel bikes
Geometry
Stack | 575mm | 582mm +7mm |
Reach | 377mm | 382mm +5mm |
Stack to Reach Ratio | 1.53:1 | 1.52:1 |
Seat Tube Length, C-T | 510mm | — |
Seat Tube Length, C-TTT | — | 460mm |
Top Tube Length, Effective/Horizontal HT Top | 549mm | — |
Top Tube Length, Effective/Horizontal Unknown | — | 552mm |
Top Tube Slope | 9.4deg | 13.2deg +3.8deg |
Head Tube Angle | 70deg | 71deg +1deg |
Seat Tube Angle | 73.5deg | 73.7deg +0.2deg |
Head Tube Length | 139mm | 150mm +11mm |
Bottom Bracket Drop | 75mm | 76mm +1mm |
Bottom Bracket Height | 264mm | 275mm +11mm |
Chainstay Length | 430mm | 430mm +0mm |
Chainstay Length Horizontal | 423.4mm | 423.2mm -0.2mm |
Front-Center | 612mm | 614mm +2mm |
Front-Center Horizontal | 606.6mm | 608.8mm +2.2mm |
Wheelbase | 1030mm | 1032mm +2mm |
Fork Offset/Rake | 45mm | 50mm +5mm |
Fork Length, Unknown | — | 401mm |
Trail | 75.5mm high | 68mm -7.5mm high |
Mechanical Trail | 70.9mm | 64.3mm -6.6mm |
Wheel Flop | 24.3mm | 20.9mm -3.4mm |
Tire to Pedal Spindle | 103mm 170 mm cranks | 93mm -10mm 170 mm cranks |
Pedal Spindle to Ground Clearance | 94mm 170 mm cranks | 105mm +11mm 170 mm cranks |
Build
Wheel Size | 650B/27.5 in 584 mm BSD | 700C/29 in 622 mm BSD |
Tire Width | 47mm | 40mm -7mm |
Tire Outer Diameter | 678mm | 702mm +24mm |
Bike Length with Tires | 1708mm | 1734mm +26mm |
| Suspension Type | Rigid, non-suspension corrected | Rigid, non-suspension corrected |
| Bar Type | Drop Bar | Drop Bar |
| Frame Material | Titanium | Carbon/Composite |
| Fork Material | Carbon/Composite | Carbon/Composite |
| Brake Type | Disc | Disc |
Meta
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| Source | https://www.serk.cc/a21/ | https://www.sp-cycle.com/factory-direct-sales-2022-new-hidden-inner-cable-disc-gravel-frame-t1000-full-carbon-fiber-gravel-bike-frame-with-aero-handlebar-p4313854.html |
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