2022 Serk Titanium A21 650b wheels M
Build
650B/27.5 in × 47 mm
Insights
Average stack and reach vs trend of all-road/gravel bikes
Design deviates from other sizes of Serk Titanium A21
Stack and Reach vs. Category Trend
View all sizes
Geometry
| Stack | 575mm |
| Reach | 377mm |
| Stack to Reach Ratio | 1.53:1 |
| Seat Tube Length, C-T | 510mm |
| Top Tube Length, Effective/Horizontal HT Top | 549mm |
| Top Tube Slope | 9.4deg |
| Head Tube Angle | 70deg |
| Seat Tube Angle | 73.5deg |
| Head Tube Length | 139mm |
| Bottom Bracket Drop | 75mm |
| Bottom Bracket Height | 264mm |
| Chainstay Length | 430mm |
| Chainstay Length Horizontal | 423.4mm |
| Front-Center | 612mm |
| Front-Center Horizontal | 606.6mm |
| Wheelbase | 1030mm |
| Fork Offset/Rake | 45mm |
| Trail | 75.5mm high |
| Mechanical Trail | 70.9mm |
| Wheel Flop | 24.3mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 103mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 94mm |
650b wheels Build
| Wheel Size | 650B, 27.5 inch (584mm BSD) |
| Tire Width | 47mm |
| Tire Outer Diameter | 678mm |
| Bike Length with Tires | 1708mm |
| Suspension Type | Rigid, non-suspension corrected |
| Bar Type | Drop Bar |
| Frame Material | Titanium |
| Fork Material | Carbon/Composite |
| Brake Type | Disc |
Source:https://www.serk.cc/a21/