2025 4BRO BIKES Gravel Bike Steel S*
Build
650B/27.5 in × 52 mm
Insights
Somewhat aggressive stack and reach vs trend of all-road/gravel bikes
Design deviates from other sizes of 4BRO BIKES Gravel Bike
Stack and Reach vs. Category Trend
View all sizes
Geometry
| Stack | 569mm |
| Reach | 390mm |
| Stack to Reach Ratio | 1.46:1 |
| Seat Tube Length, Unknown | 450mm |
| Top Tube Length, Effective/Horizontal Unknown | 535mm |
| Top Tube Slope | 14.9deg |
| Head Tube Angle | 70deg |
| Seat Tube Angle | 74deg |
| Effective Seat Tube Angle, Seat Tube Top | 77deg |
| Head Tube Length | 150mm |
| Bottom Bracket Drop | 72mm |
| Bottom Bracket Height | 272mm |
| Chainstay Length | 430mm |
| Chainstay Length Horizontal | 423.9mm |
| Front-Center | 624mm |
| Front-Center Horizontal | 620.1mm |
| Wheelbase | 1044mm |
| Fork Offset/Rake | 50mm |
| Fork Length, Unknown | 400mm |
| Trail | 72mm high |
| Mechanical Trail | 67.7mm |
| Wheel Flop | 23.1mm |
| Standover Height | 757mm |
| Tire to Pedal Spindle Distance With 165 mm cranks | 115mm |
| Pedal Spindle to Ground Clearance With 165 mm cranks | 107mm |
Steel Build
| Wheel Size | 650B, 27.5 inch (584mm BSD) |
| Tire Width | 52mm |
| Tire Outer Diameter | 688mm |
| Bike Length with Tires | 1732mm |
| Crank Length | 165mm |
| Suspension Type | Rigid, suspension corrected |
| Bar Type | Drop Bar |
| Frame Material | Steel |
| Fork Material | Carbon/Composite |
| Brake Type | Disc |
Published Sizing Recommendations
| Height | 5 ft 4 in to 5 ft 7 in |
Source:https://4brobikes.vn/