Bike-on-Bike
Default Config
Default Config
Insights
Somewhat upright 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 | 548mm | 556mm +8mm |
Reach | 364mm | 372mm +8mm |
Stack to Reach Ratio | 1.51:1 | 1.49:1 |
Seat Tube Length, C-T | 485mm | — |
Seat Tube Length, C-TTT | — | 430mm |
Top Tube Length, Effective/Horizontal HT Top | 523mm | — |
Top Tube Length, Effective/Horizontal Unknown | — | 528mm |
Top Tube Slope | 9.3deg | 14deg +4.7deg |
Head Tube Angle | 70deg | 70.5deg +0.5deg |
Seat Tube Angle | 74deg | 74.3deg +0.3deg |
Head Tube Length | 110mm | 125mm +15mm |
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 | 589mm | 600mm +11mm |
Front-Center Horizontal | 584.6mm | 594.8mm +10.2mm |
Wheelbase | 1008mm | 1018mm +10mm |
Fork Offset/Rake | 45mm | 50mm +5mm |
Fork Length, Unknown | — | 401mm |
Trail | 75.5mm high | 71.3mm -4.2mm high |
Mechanical Trail | 70.9mm | 67.2mm -3.7mm |
Wheel Flop | 24.3mm | 22.4mm -1.9mm |
Tire to Pedal Spindle | 80mm 170 mm cranks | 79mm -1mm 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 | 1686mm | 1720mm +34mm |
| 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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