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
Somewhat upright stack and reach vs trend of progressive gravel bikes
Geometry
Stack | 575mm | 573mm -2mm |
Reach | 377mm | 394mm +17mm |
Stack to Reach Ratio | 1.53:1 | 1.45:1 |
Seat Tube Length, C-T | 510mm | — |
Seat Tube Length, Unknown | — | 480mm |
Top Tube Length, Effective/Horizontal HT Top | 549mm | — |
Top Tube Length, Effective/Horizontal Unknown | — | 559mm |
Top Tube Slope | 9.4deg | 12deg +2.6deg |
Head Tube Angle | 70deg | 71.5deg +1.5deg |
Seat Tube Angle | 73.5deg | 73.5deg +0deg |
Head Tube Length | 139mm | 145mm +6mm |
Bottom Bracket Drop | 75mm | 75mm +0mm |
Bottom Bracket Height | 264mm | 276mm +12mm |
Chainstay Length | 430mm | 425mm -5mm |
Chainstay Length Horizontal | 423.4mm | 418.3mm -5.1mm |
Front-Center | 612mm | 620.2mm +8.2mm |
Front-Center Horizontal | 606.6mm | 615.7mm +9.1mm |
Wheelbase | 1030mm | 1034mm +4mm |
Fork Offset/Rake | 45mm | 52.2mm +7.2mm |
Trail | 75.5mm high | 62.4mm -13.1mm mid/neutral |
Mechanical Trail | 70.9mm | 59.2mm -11.7mm |
Wheel Flop | 24.3mm | 18.8mm -5.5mm |
Standover Height | — | 789mm |
Tire to Pedal Spindle | 103mm 170 mm cranks | 99.2mm -3.8mm 170 mm cranks |
Pedal Spindle to Ground Clearance | 94mm 170 mm cranks | 106mm +12mm 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 | 1736mm +28mm |
Crank Length | — | 170mm |
Handlebar Width | — | 420mm |
Stem Length | — | 70mm |
| Suspension Type | Rigid, non-suspension corrected | Rigid, non-suspension corrected |
| Bar Type | Drop Bar | Drop Bar |
| Frame Material | Titanium | Unknown |
| Fork Material | Carbon/Composite | Carbon/Composite |
| Brake Type | Disc | Disc |
Meta
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| Source | https://www.serk.cc/a21/ | https://www.canyon.com/it-it/bici-gravel/race/grail/cf/grail-cf-7/4149.html |
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