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
Somewhat upright stack and reach vs trend of all-road/gravel bikes
Design deviates from other sizes of Cannondale Topstone
Geometry
Stack | 548mm | 554mm +6mm |
Reach | 364mm | 364mm +0mm |
Stack to Reach Ratio | 1.51:1 | 1.52:1 |
Seat Tube Length, C-T | 485mm | 410mm -75mm |
Top Tube Length, Effective/Horizontal HT Top | 523mm | 532mm +9mm |
Top Tube Length, Actual C-C | — | 510mm |
Top Tube Slope | 9.3deg | 18.5deg +9.2deg |
Head Tube Angle | 70deg | 69.9deg -0.1deg |
Seat Tube Angle | 74deg | 73.1deg -0.9deg |
Head Tube Length | 110mm | 97mm -13mm |
Bottom Bracket Drop | 75mm | 79mm +4mm |
Bottom Bracket Height | 264mm | 272mm +8mm |
Chainstay Length | 430mm | 420mm -10mm |
Chainstay Length Horizontal | 423.4mm | 412.5mm -10.9mm |
Front-Center | 589mm | 601mm +12mm |
Front-Center Horizontal | 584.6mm | 596.5mm +11.9mm |
Wheelbase | 1008mm | 1009mm +1mm |
Fork Offset/Rake | 45mm | 55.1mm +10.1mm |
Trail | 75.5mm high | 69.8mm -5.7mm high |
Mechanical Trail | 70.9mm | 65.5mm -5.4mm |
Wheel Flop | 24.3mm | 22.5mm -1.8mm |
Standover Height | — | 716mm |
Tire to Pedal Spindle | 80mm 170 mm cranks | 80mm +0mm 170 mm cranks |
Pedal Spindle to Ground Clearance | 94mm 170 mm cranks | 102mm +8mm 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 | 1711mm +25mm |
| 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.cannondale.com/en-us/bikes/road/gravel/topstone-carbon/topstone-carbon-1-axs |
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