2024 BOMA Evolution IV Base S-470
Build
700C/29 in × 30 mm
Insights
Average stack and reach vs trend of performance road bikes
Stack and Reach vs. Category Trend
View all sizes
Geometry
| Stack | 517mm |
| Reach | 374mm |
| Stack to Reach Ratio | 1.38:1 |
| Seat Tube Length, C-T | 470mm |
| Top Tube Length, Effective/Horizontal Center | 515mm |
| Top Tube Slope | 7.3deg |
| Head Tube Angle | 72deg |
| Seat Tube Angle | 74.8deg |
| Head Tube Length | 107mm |
| Bottom Bracket Drop | 70mm |
| Bottom Bracket Height | 271mm |
| Chainstay Length | 415mm |
| Chainstay Length Horizontal | 409.1mm |
| Front-Center | 571mm |
| Front-Center Horizontal | 567mm |
| Wheelbase | 976mm |
| Fork Offset/Rake | 45mm |
| Trail | 63.5mm mid/neutral |
| Mechanical Trail | 60.4mm |
| Wheel Flop | 18.7mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 60mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 101mm |
Base Build
| Wheel Size | 700C, 29 inch (622mm BSD) |
| Tire Width | 30mm |
| Tire Outer Diameter | 682mm |
| Bike Length with Tires | 1658mm |
| Handlebar Width | 395mm |
| Stem Length | 90mm |
| Suspension Type | Rigid, non-suspension corrected |
| Bar Type | Drop Bar |
| Frame Material | Carbon/Composite |
| Fork Material | Carbon/Composite |
| Brake Type | Disc |
Source:http://www.boma.jp/products/frame_set/evolution4/