Bike-on-Bike
Default Config
Default Config
Insights
Somewhat aggressive stack and reach vs trend of all-road/gravel bikes
Average stack and reach vs trend of all-road/gravel bikes
Design deviates from other sizes of Serk Titanium A21
Geometry
Stack | 602.5mm | 619mm +16.5mm |
Reach | 408mm | 403mm -5mm |
Stack to Reach Ratio | 1.48:1 | 1.54:1 |
Seat Tube Length, C-T | — | 560mm |
Seat Tube Length, C-TTT | 522mm | — |
Top Tube Length, Effective/Horizontal HT Top | 580mm | 594mm +14mm |
Top Tube Slope | 8.3deg | 8.4deg +0.1deg |
Head Tube Angle | 70deg | 70deg +0deg |
Seat Tube Angle | 74deg | 73deg -1deg |
Head Tube Length | 190mm | 188mm -2mm |
Bottom Bracket Drop | 69mm | 73mm +4mm |
Bottom Bracket Height | 282mm | 266mm -16mm |
Chainstay Length | 427mm | 430mm +3mm |
Chainstay Length Horizontal | 421.4mm | 423.8mm +2.4mm |
Front-Center | 659mm | 654mm -5mm |
Front-Center Horizontal | 655.6mm | 649.2mm -6.4mm |
Wheelbase | 1077mm | 1073mm -4mm |
Fork Offset/Rake | 50mm | 45mm -5mm |
Fork Length, Unknown | 395mm | — |
Trail | 74.5mm high | 75.5mm +1mm high |
Mechanical Trail | 70.1mm | 70.9mm +0.8mm |
Wheel Flop | 24mm | 24.3mm +0.3mm |
Tire to Pedal Spindle | 138mm 170 mm cranks | 145mm +7mm 170 mm cranks |
Pedal Spindle to Ground Clearance | 112mm 170 mm cranks | 96mm -16mm 170 mm cranks |
Build
Wheel Size | 700C/29 in 622 mm BSD | 650B/27.5 in 584 mm BSD |
Tire Width | 40mm | 47mm +7mm |
Tire Outer Diameter | 702mm | 678mm -24mm |
Bike Length with Tires | 1779mm | 1751mm -28mm |
| Suspension Type | Rigid, non-suspension corrected | Rigid, non-suspension corrected |
| Bar Type | Drop Bar | Drop Bar |
| Frame Material | Carbon/Composite | Titanium |
| Fork Material | Carbon/Composite | Carbon/Composite |
| Brake Type | Disc | Disc |
Meta
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| Source | https://pl.aliexpress.com/item/1005003540978175.html?spm=a2g0o.productlist.0.0.5f9b26714F0QzZ&algo_pvid=1ee16a61-6c1d-44c0-bcab-d39c0e28f4a6&algo_exp_id=1ee16a61-6c1d-44c0-bcab-d39c0e28f4a6-4&pdp_ext_f=%7B%22sku_id%22%3A%2212000026224445234%22%7D | https://www.serk.cc/a21/ |
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