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
Average stack and reach vs trend of all-road/gravel bikes
Design deviates from other sizes of ROSE Bikes Backroad AL
Geometry
Stack | 548mm | 540.8mm -7.2mm |
Reach | 364mm | 365.1mm +1.1mm |
Stack to Reach Ratio | 1.51:1 | 1.48:1 |
Seat Tube Length, C-T | 485mm | 440mm -45mm |
Top Tube Length, Effective/Horizontal HT Top | 523mm | 510mm -13mm |
Top Tube Slope | 9.3deg | 13.6deg +4.3deg |
Head Tube Angle | 70deg | 70deg +0deg |
Seat Tube Angle | 74deg | 75deg +1deg |
Head Tube Length | 110mm | 100mm -10mm |
Bottom Bracket Drop | 75mm | 78mm +3mm |
Bottom Bracket Height | 264mm | 273mm +9mm |
Chainstay Length | 430mm | 430mm +0mm |
Chainstay Length Horizontal | 423.4mm | 422.9mm -0.5mm |
Front-Center | 589mm | 589.8mm +0.8mm |
Front-Center Horizontal | 584.6mm | 584.6mm +0mm |
Wheelbase | 1008mm | 1007.5mm -0.5mm |
Fork Offset/Rake | 45mm | 48mm +3mm |
Fork Length (Axle-To-Crown) | — | 410mm |
Trail | 75.5mm high | 76.7mm +1.2mm high |
Mechanical Trail | 70.9mm | 72.1mm +1.2mm |
Wheel Flop | 24.3mm | 24.6mm +0.3mm |
Standover Height | — | 763mm |
Tire to Pedal Spindle | 80mm 170 mm cranks | 68.8mm -11.2mm 170 mm cranks |
Pedal Spindle to Ground Clearance | 94mm 170 mm cranks | 103mm +9mm 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 | 1709.5mm +23.5mm |
| Suspension Type | Rigid, non-suspension corrected | Rigid, non-suspension corrected |
| Bar Type | Drop Bar | Drop Bar |
| Frame Material | Titanium | Aluminum |
| Fork Material | Carbon/Composite | Carbon/Composite |
| Brake Type | Disc | Disc |
Meta
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| Source | https://www.serk.cc/a21/ | https://www.rosebikes.com/p/rose-backroad-al-eq-2725772 |
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