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 aggressive stack and reach vs trend of all-road/gravel bikes
Geometry
Stack | 619mm | 612.8mm -6.2mm |
Reach | 403mm | 411.4mm +8.4mm |
Stack to Reach Ratio | 1.54:1 | 1.49:1 |
Seat Tube Length, C-T | 560mm | 530mm -30mm |
Top Tube Length, Effective/Horizontal HT Top | 594mm | 590mm -4mm |
Top Tube Slope | 8.4deg | 10.5deg +2.1deg |
Head Tube Angle | 70deg | 71.5deg +1.5deg |
Seat Tube Angle | 73deg | 73.75deg +0.75deg |
Head Tube Length | 188mm | 170mm -18mm |
Bottom Bracket Drop | 73mm | 78mm +5mm |
Bottom Bracket Height | 266mm | 273mm +7mm |
Chainstay Length | 430mm | 430mm +0mm |
Chainstay Length Horizontal | 423.8mm | 422.9mm -0.9mm |
Front-Center | 654mm | 645.7mm -8.3mm |
Front-Center Horizontal | 649.2mm | 640.9mm -8.3mm |
Wheelbase | 1073mm | 1063.8mm -9.2mm |
Fork Offset/Rake | 45mm | 48mm +3mm |
Fork Length (Axle-To-Crown) | — | 410mm |
Trail | 75.5mm high | 66.8mm -8.7mm high |
Mechanical Trail | 70.9mm | 63.4mm -7.5mm |
Wheel Flop | 24.3mm | 20.1mm -4.2mm |
Standover Height | — | 842mm |
Tire to Pedal Spindle | 145mm 170 mm cranks | 124.7mm -20.3mm 170 mm cranks |
Pedal Spindle to Ground Clearance | 96mm 170 mm cranks | 103mm +7mm 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 | 1751mm | 1765.8mm +14.8mm |
| 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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