2018 Brother Cycles Big Bro Base Medium (18)
Build
650B/27.5 in × 3 in
Stack and Reach vs. Category Trend
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Geometry
| Stack | 605mm |
| Reach | 410mm |
| Stack to Reach Ratio | 1.48:1 |
| Seat Tube Length, C-T | 457mm |
| Top Tube Length, Effective/Horizontal HT Top | 595mm |
| Top Tube Length, Actual C-C | 571mm |
| Top Tube Slope | 17.2deg |
| Head Tube Angle | 70deg |
| Seat Tube Angle | 73deg |
| Head Tube Length | 100mm |
| Bottom Bracket Drop | 60mm |
| Bottom Bracket Height | 308.2mm |
| Chainstay Length | 445mm |
| Chainstay Length Horizontal | 440.9mm |
| Front-Center | 659.8mm |
| Front-Center Horizontal | 657.1mm |
| Wheelbase | 1098mm |
| Fork Offset/Rake | 46mm |
| Fork Length (Axle-To-Crown) | 483mm |
| Trail | 85.1mm very high |
| Mechanical Trail | 79.9mm |
| Wheel Flop | 27.3mm |
| Standover Height | 810mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 121.6mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 138.2mm |
Base Build
| Wheel Size | 650B, 27.5 inch (584mm BSD) |
| Tire Width | 3in |
| Tire Outer Diameter | 736.4mm |
| Bike Length with Tires | 1834.4mm |
| Handlebar Width | 730mm |
| Stem Length | 70mm |
| Suspension Type | Rigid, suspension corrected |
| Bar Type | Flat Bar |
| Frame Material | Steel |
| Fork Material | Steel |
| Brake Type | Disc |
Source:https://www.brothercycles.com/shop/bikes/big-bro-complete/