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
Design deviates from other sizes of SPCYCLE SP-G056
Geometry
Stack | 597mm | 608mm +11mm |
Reach | 390mm | 391mm +1mm |
Stack to Reach Ratio | 1.53:1 | 1.55:1 |
Seat Tube Length, C-T | 535mm | — |
Seat Tube Length, C-TTT | — | 490mm |
Top Tube Length, Effective/Horizontal HT Top | 569mm | — |
Top Tube Length, Effective/Horizontal Unknown | — | 575mm |
Top Tube Slope | 8.8deg | 12.6deg +3.8deg |
Head Tube Angle | 70deg | 71.5deg +1.5deg |
Seat Tube Angle | 73.5deg | 73.1deg -0.4deg |
Head Tube Length | 164mm | 175mm +11mm |
Bottom Bracket Drop | 73mm | 76mm +3mm |
Bottom Bracket Height | 266mm | 275mm +9mm |
Chainstay Length | 430mm | 430mm +0mm |
Chainstay Length Horizontal | 423.8mm | 423.2mm -0.6mm |
Front-Center | 633mm | 626mm -7mm |
Front-Center Horizontal | 628.2mm | 621.8mm -6.4mm |
Wheelbase | 1052mm | 1045mm -7mm |
Fork Offset/Rake | 45mm | 50mm +5mm |
Fork Length, Unknown | — | 401mm |
Trail | 75.5mm high | 64.7mm -10.8mm mid/neutral |
Mechanical Trail | 70.9mm | 61.4mm -9.5mm |
Wheel Flop | 24.3mm | 19.5mm -4.8mm |
Tire to Pedal Spindle | 124mm 170 mm cranks | 105mm -19mm 170 mm cranks |
Pedal Spindle to Ground Clearance | 96mm 170 mm cranks | 105mm +9mm 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 | 1730mm | 1747mm +17mm |
| 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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