2025 Brother Cycles Stroma Base Medium
Build
700C/29 in × 38 mm
Insights
Average stack and reach vs trend of endurance road bikes
Stack and Reach vs. Category Trend
View all sizes
Geometry
| Stack | 563mm |
| Reach | 385mm |
| Stack to Reach Ratio | 1.46:1 |
| Seat Tube Length, C-T | 540mm |
| Seat Tube Length, C-C | 542mm |
| Top Tube Length, Effective/Horizontal Center | 557mm |
| Top Tube Slope | 4.9deg |
| Head Tube Angle | 72.5deg |
| Seat Tube Angle | 73deg |
| Head Tube Length | 140mm |
| Bottom Bracket Drop | 70mm |
| Bottom Bracket Height | 279mm |
| Chainstay Length | 420mm |
| Chainstay Length Horizontal | 414.1mm |
| Front-Center | 592mm |
| Front-Center Horizontal | 587.9mm |
| Wheelbase | 1002mm |
| Fork Offset/Rake | 45mm |
| Fork Length (Axle-To-Crown) | 381mm |
| Trail | 62.9mm mid/neutral |
| Mechanical Trail | 60mm |
| Wheel Flop | 18mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 73mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 109mm |
Base Build
| Wheel Size | 700C, 29 inch (622mm BSD) |
| Tire Width | 38mm |
| Tire Outer Diameter | 698mm |
| Bike Length with Tires | 1700mm |
| Suspension Type | Rigid, non-suspension corrected |
| Bar Type | Drop Bar |
| Frame Material | Steel |
| Fork Material | Carbon/Composite |
| Brake Type | Disc |
Source:https://www.brothercycles.com/shop/frames/stroma-2025/