Bike-on-Bike
Default Config
49
No Diagram
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 ROSE Bikes Backroad AL
Geometry
Stack | 548mm | 543mm -5mm |
Reach | 364mm | 356mm -8mm |
Stack to Reach Ratio | 1.51:1 | 1.53:1 |
Seat Tube Length, C-T | 485mm | — |
Seat Tube Length, C-C | — | 450mm |
Top Tube Length, Effective/Horizontal HT Top | 523mm | 506mm -17mm |
Top Tube Slope | 9.3deg | — |
Head Tube Angle | 70deg | 69.5deg -0.5deg |
Seat Tube Angle | 74deg | 74.5deg +0.5deg |
Head Tube Length | 110mm | 118mm +8mm |
Bottom Bracket Drop | 75mm | — |
Bottom Bracket Height | 264mm | — |
Chainstay Length | 430mm | 430mm +0mm |
Chainstay Length Horizontal | 423.4mm | — |
Front-Center | 589mm | — |
Front-Center Horizontal | 584.6mm | — |
Wheelbase | 1008mm | 1006mm -2mm |
Fork Offset/Rake | 45mm | — |
Trail | 75.5mm high | — — |
Mechanical Trail | 70.9mm | — |
Wheel Flop | 24.3mm | — |
Standover Height | — | 766.5mm |
Tire to Pedal Spindle | 80mm 170 mm cranks | — 170 mm cranks |
Pedal Spindle to Ground Clearance | 94mm 170 mm cranks | — 170 mm cranks |
Build
Wheel Size | 650B/27.5 in 584 mm BSD | 650C 571 mm BSD |
Tire Width | 47mm | 45mm -2mm |
Tire Outer Diameter | 678mm | 661mm -17mm |
Bike Length with Tires | 1686mm | 1667mm -19mm |
| 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://99spokes.com/en-EU/bikes/rose/2024/backroad-al-grx-rx600 |
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