2024 Bona Bikes G31A Base 540 (XL)
Build
700C/29 in × 45 mm
Insights
Average stack and reach vs trend of all-road/gravel bikes
Design deviates from other sizes of Bona Bikes G31A
Stack and Reach vs. Category Trend
View all sizes
Geometry
| Stack | 605mm |
| Reach | 390mm |
| Stack to Reach Ratio | 1.55:1 |
| Seat Tube Length, C-T | 540mm |
| Top Tube Length, Effective/Horizontal Unknown | 575mm |
| Top Tube Slope | 9.2deg |
| Head Tube Angle | 72deg |
| Seat Tube Angle | 73deg |
| Head Tube Length | 170mm |
| Bottom Bracket Drop | 72mm |
| Bottom Bracket Height | 284mm |
| Chainstay Length | 440mm |
| Chainstay Length Horizontal | 434.1mm |
| Front-Center | 615mm |
| Front-Center Horizontal | 611.9mm |
| Wheelbase | 1046mm |
| Fork Offset/Rake | 45mm |
| Fork Length, Unknown | 407mm |
| Trail | 68.4mm high |
| Mechanical Trail | 65mm |
| Wheel Flop | 20.1mm |
| Standover Height | 771mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 89mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 114mm |
Base Build
| Wheel Size | 700C, 29 inch (622mm BSD) |
| Tire Width | 45mm |
| Tire Outer Diameter | 712mm |
| Bike Length with Tires | 1758mm |
| Suspension Type | Rigid, non-suspension corrected |
| Bar Type | Drop Bar |
| Frame Material | Titanium |
| Fork Material | Unknown |
| Brake Type | Unknown |
Published Sizing Recommendations
| Height | 178 cm to 188 cm |
Source:http://www.bonabike.com/goods/Gr9-Titanium-Gravel-Road-Bike-Frame-700CX45C