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 progressive gravel bikes
Geometry
Stack | 619mm | 613mm -6mm |
Reach | 403mm | 427mm +24mm |
Stack to Reach Ratio | 1.54:1 | 1.44:1 |
Seat Tube Length, C-T | 560mm | — |
Seat Tube Length, Unknown | — | 540mm |
Top Tube Length, Effective/Horizontal HT Top | 594mm | — |
Top Tube Length, Effective/Horizontal Unknown | — | 609mm |
Top Tube Slope | 8.4deg | 9.3deg +0.9deg |
Head Tube Angle | 70deg | 71.5deg +1.5deg |
Seat Tube Angle | 73deg | 73.5deg +0.5deg |
Head Tube Length | 188mm | 187mm -1mm |
Bottom Bracket Drop | 73mm | 75mm +2mm |
Bottom Bracket Height | 266mm | 276mm +10mm |
Chainstay Length | 430mm | 425mm -5mm |
Chainstay Length Horizontal | 423.8mm | 418.3mm -5.5mm |
Front-Center | 654mm | 665.9mm +11.9mm |
Front-Center Horizontal | 649.2mm | 661.7mm +12.5mm |
Wheelbase | 1073mm | 1080mm +7mm |
Fork Offset/Rake | 45mm | 51.8mm +6.8mm |
Trail | 75.5mm high | 62.8mm -12.7mm mid/neutral |
Mechanical Trail | 70.9mm | 59.5mm -11.4mm |
Wheel Flop | 24.3mm | 18.9mm -5.4mm |
Standover Height | — | 838mm |
Tire to Pedal Spindle | 145mm 170 mm cranks | 142.4mm -2.6mm 172.5 mm cranks |
Pedal Spindle to Ground Clearance | 96mm 170 mm cranks | 103.5mm +7.5mm 172.5 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 | 1751mm | 1782mm +31mm |
Crank Length | — | 172.5mm |
Handlebar Width | — | 440mm |
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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