2025 Rennstahl Stahl Bikes 781 Base XS
Build
700C/29 in × 40 mm
Insights
Average stack and reach vs trend of all-road/gravel bikes
Design deviates from other sizes of Rennstahl Stahl Bikes 781
Stack and Reach vs. Category Trend
View all sizes
Geometry
| Stack | 552mm |
| Reach | 375mm |
| Stack to Reach Ratio | 1.47:1 |
| Seat Tube Length, Unknown | 420mm |
| Top Tube Length, Effective/Horizontal Unknown | 535mm |
| Top Tube Slope | 16.8deg |
| Head Tube Angle | 71deg |
| Seat Tube Angle | 74deg |
| Head Tube Length | 125mm |
| Bottom Bracket Drop | 72mm |
| Bottom Bracket Height | 279mm |
| Chainstay Length | 430mm |
| Chainstay Length Horizontal | 423.9mm |
| Front-Center | 580.6mm |
| Front-Center Horizontal | 576.1mm |
| Wheelbase | 1000mm |
| Fork Offset/Rake | 33.8mm |
| Trail | 85.1mm very high |
| Mechanical Trail | 80.4mm |
| Wheel Flop | 26.2mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 59.6mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 109mm |
Base Build
| Wheel Size | 700C, 29 inch (622mm BSD) |
| Tire Width | 40mm |
| Tire Outer Diameter | 702mm |
| Bike Length with Tires | 1702mm |
| Crank Length | 170mm |
| Handlebar Width | 400mm |
| Stem Length | 70mm |
| Suspension Type | Rigid, non-suspension corrected |
| Bar Type | Drop Bar |
| Frame Material | Steel |
| Fork Material | Carbon/Composite |
| Brake Type | Disc |
Published Sizing Recommendations
| Height | 12 ft 11 in to |
Source:https://www.1bike4life.com/rennstahl/bikes/781-gravel