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
Somewhat upright stack and reach vs trend of progressive gravel bikes
Design deviates from other sizes of TanTan Cycling (Seraph) GR048
Geometry
Stack | 548mm | 537mm -11mm |
Reach | 364mm | 362mm -2mm |
Stack to Reach Ratio | 1.51:1 | 1.48:1 |
Seat Tube Length, C-T | 485mm | 420mm -65mm |
Top Tube Length, Effective/Horizontal Center | — | 511mm |
Top Tube Length, Effective/Horizontal HT Top | 523mm | — |
Top Tube Slope | 9.3deg | 15.6deg +6.3deg |
Head Tube Angle | 70deg | 70deg +0deg |
Seat Tube Angle | 74deg | 74.5deg +0.5deg |
Head Tube Length | 110mm | 110mm +0mm |
Bottom Bracket Drop | 75mm | 75mm +0mm |
Bottom Bracket Height | 264mm | 286mm +22mm |
Chainstay Length | 430mm | 425mm -5mm |
Chainstay Length Horizontal | 423.4mm | 418.3mm -5.1mm |
Front-Center | 589mm | 588mm -1mm |
Front-Center Horizontal | 584.6mm | 583.7mm -0.9mm |
Wheelbase | 1008mm | 1002mm -6mm |
Fork Offset/Rake | 45mm | 50mm +5mm |
Fork Length (On-Axis) | — | 400mm |
Trail | 75.5mm high | 78.2mm +2.7mm high |
Mechanical Trail | 70.9mm | 73.5mm +2.6mm |
Wheel Flop | 24.3mm | 25.1mm +0.8mm |
Tire to Pedal Spindle | 80mm 170 mm cranks | 57mm -23mm 170 mm cranks |
Pedal Spindle to Ground Clearance | 94mm 170 mm cranks | 116mm +22mm 170 mm cranks |
Build
Wheel Size | 650B/27.5 in 584 mm BSD | 700C/29 in 622 mm BSD |
Tire Width | 47mm | 50mm +3mm |
Tire Outer Diameter | 678mm | 722mm +44mm |
Bike Length with Tires | 1686mm | 1724mm +38mm |
| Suspension Type | Rigid, non-suspension corrected | Rigid, non-suspension corrected |
| Bar Type | Drop Bar | Aero Bar |
| Frame Material | Titanium | Carbon/Composite |
| Fork Material | Carbon/Composite | Carbon/Composite |
| Brake Type | Disc | Disc |
Meta
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| Source | https://www.serk.cc/a21/ | https://www.seraphbikes.com/Carbon-Fiber-T1000-Gravel-Bike-Frame-GR048-Green-Pink-paint-Speckled-Design-T47-Bottom-Bracket-p6853170.html |
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