2025 Rennstahl Stahl Bikes 781 Base S
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 | 555mm |
| Reach | 378mm |
| Stack to Reach Ratio | 1.47:1 |
| Seat Tube Length, Unknown | 470mm |
| Top Tube Length, Effective/Horizontal Unknown | 530mm |
| Top Tube Slope | 11.5deg |
| Head Tube Angle | 72.5deg |
| Seat Tube Angle | 74deg |
| Head Tube Length | 140mm |
| Bottom Bracket Drop | 72mm |
| Bottom Bracket Height | 279mm |
| Chainstay Length | 430mm |
| Chainstay Length Horizontal | 423.9mm |
| Front-Center | 585.5mm |
| Front-Center Horizontal | 581.1mm |
| Wheelbase | 1005mm |
| Fork Offset/Rake | 48.4mm |
| Trail | 59.9mm mid/neutral |
| Mechanical Trail | 57.1mm |
| Wheel Flop | 17.2mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 64.5mm |
| 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 | 1707mm |
| Crank Length | 170mm |
| Handlebar Width | 400mm |
| Stem Length | 80mm |
| Suspension Type | Rigid, non-suspension corrected |
| Bar Type | Drop Bar |
| Frame Material | Steel |
| Fork Material | Carbon/Composite |
| Brake Type | Disc |
Published Sizing Recommendations
| Height | 13 ft 9 in to |
Source:https://www.1bike4life.com/rennstahl/bikes/781-gravel