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 TanTan Cycling (Seraph) GR047
Geometry
Stack | 619mm | 633mm +14mm |
Reach | 403mm | 401mm -2mm |
Stack to Reach Ratio | 1.54:1 | 1.58:1 |
Seat Tube Length, C-T | 560mm | 530mm -30mm |
Top Tube Length, Effective/Horizontal HT Top | 594mm | 600mm +6mm |
Top Tube Slope | 8.4deg | 12.8deg +4.4deg |
Head Tube Angle | 70deg | 72deg +2deg |
Seat Tube Angle | 73deg | 72.6deg -0.4deg |
Head Tube Length | 188mm | 200mm +12mm |
Bottom Bracket Drop | 73mm | 76mm +3mm |
Bottom Bracket Height | 266mm | 280mm +14mm |
Chainstay Length | 430mm | 430mm +0mm |
Chainstay Length Horizontal | 423.8mm | 423.2mm -0.6mm |
Front-Center | 654mm | 639mm -15mm |
Front-Center Horizontal | 649.2mm | 634.5mm -14.7mm |
Wheelbase | 1073mm | 1057.7mm -15.3mm |
Fork Offset/Rake | 45mm | 50mm +5mm |
Trail | 75.5mm high | 63.1mm -12.4mm mid/neutral |
Mechanical Trail | 70.9mm | 60mm -10.9mm |
Wheel Flop | 24.3mm | 18.5mm -5.8mm |
Tire to Pedal Spindle | 145mm 170 mm cranks | 110.5mm -34.5mm 172.5 mm cranks |
Pedal Spindle to Ground Clearance | 96mm 170 mm cranks | 107.5mm +11.5mm 172.5 mm cranks |
Build
Wheel Size | 650B/27.5 in 584 mm BSD | 700C/29 in 622 mm BSD |
Tire Width | 47mm | 45mm -2mm |
Tire Outer Diameter | 678mm | 712mm +34mm |
Bike Length with Tires | 1751mm | 1769.7mm +18.7mm |
Crank Length | — | 172.5mm |
Handlebar Width | — | 440mm |
Stem Length | — | 110mm |
| 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://ae01.alicdn.com/kf/S5c9de74c1c93417789372a5bf39abc6fB.jpg |
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