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 | 619mm | 601mm -18mm |
Reach | 403mm | 399mm -4mm |
Stack to Reach Ratio | 1.54:1 | 1.51:1 |
Seat Tube Length, C-T | 560mm | — |
Seat Tube Length, Unknown | — | 540mm |
Top Tube Length, Effective/Horizontal HT Top | 594mm | — |
Top Tube Length, Actual C-C | — | 577mm |
Top Tube Slope | 8.4deg | 8.6deg +0.2deg |
Head Tube Angle | 70deg | 70.5deg +0.5deg |
Seat Tube Angle | 73deg | 73.5deg +0.5deg |
Head Tube Length | 188mm | 180mm -8mm |
Bottom Bracket Drop | 73mm | 75mm +2mm |
Bottom Bracket Height | 266mm | 281mm +15mm |
Chainstay Length | 430mm | 430mm +0mm |
Chainstay Length Horizontal | 423.8mm | 423.4mm -0.4mm |
Front-Center | 654mm | 644mm -10mm |
Front-Center Horizontal | 649.2mm | 639.6mm -9.6mm |
Wheelbase | 1073mm | 1063mm -10mm |
Fork Offset/Rake | 45mm | 51mm +6mm |
Fork Length (On-Axis) | — | 395mm |
Trail | 75.5mm high | 72mm -3.5mm high |
Mechanical Trail | 70.9mm | 67.8mm -3.1mm |
Wheel Flop | 24.3mm | 22.6mm -1.7mm |
Standover Height | — | 838mm |
Tire to Pedal Spindle | 145mm 170 mm cranks | 118mm -27mm 170 mm cranks |
Pedal Spindle to Ground Clearance | 96mm 170 mm cranks | 111mm +15mm 170 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 | 1775mm +24mm |
| 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.winspace.cc/products/g3-gravel |
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