2024 Bona Bikes G31A Base 480 (M)
Build
700C/29 in × 45 mm
Insights
Average stack and reach vs trend of all-road/gravel bikes
Stack and Reach vs. Category Trend
View all sizes
Geometry
| Stack | 577mm |
| Reach | 378.5mm |
| Stack to Reach Ratio | 1.52:1 |
| Seat Tube Length, C-T | 480mm |
| Top Tube Length, Effective/Horizontal Unknown | 555mm |
| Top Tube Slope | 12.8deg |
| Head Tube Angle | 71deg |
| Seat Tube Angle | 73deg |
| Head Tube Length | 145mm |
| Bottom Bracket Drop | 72mm |
| Bottom Bracket Height | 284mm |
| Chainstay Length | 440mm |
| Chainstay Length Horizontal | 434.1mm |
| Front-Center | 605mm |
| Front-Center Horizontal | 600.9mm |
| Wheelbase | 1035mm |
| Fork Offset/Rake | 45mm |
| Fork Length, Unknown | 407mm |
| Trail | 75mm high |
| Mechanical Trail | 70.9mm |
| Wheel Flop | 23.1mm |
| Standover Height | 719mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 79mm |
| 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 | 1747mm |
| Suspension Type | Rigid, non-suspension corrected |
| Bar Type | Drop Bar |
| Frame Material | Titanium |
| Fork Material | Unknown |
| Brake Type | Unknown |
Published Sizing Recommendations
| Height | 165 cm to 175 cm |
Source:http://www.bonabike.com/goods/Gr9-Titanium-Gravel-Road-Bike-Frame-700CX45C