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 | 575mm | 568.2mm -6.8mm |
Reach | 377mm | 387.4mm +10.4mm |
Stack to Reach Ratio | 1.53:1 | 1.47:1 |
Seat Tube Length, C-T | 510mm | 480mm -30mm |
Top Tube Length, Effective/Horizontal HT Top | 549mm | 545mm -4mm |
Top Tube Slope | 9.4deg | 11.6deg +2.2deg |
Head Tube Angle | 70deg | 71deg +1deg |
Seat Tube Angle | 73.5deg | 74.5deg +1deg |
Head Tube Length | 139mm | 125mm -14mm |
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 | 612mm | 612mm +0mm |
Front-Center Horizontal | 606.6mm | 607mm +0.4mm |
Wheelbase | 1030mm | 1029.9mm -0.1mm |
Fork Offset/Rake | 45mm | 48mm +3mm |
Fork Length (Axle-To-Crown) | — | 410mm |
Trail | 75.5mm high | 70.1mm -5.4mm high |
Mechanical Trail | 70.9mm | 66.3mm -4.6mm |
Wheel Flop | 24.3mm | 21.6mm -2.7mm |
Standover Height | — | 796mm |
Tire to Pedal Spindle | 103mm 170 mm cranks | 91mm -12mm 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 | 1708mm | 1731.9mm +23.9mm |
| 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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