2018 Brother Cycles Big Bro Base Small (16)
Build
650B/27.5 in × 3 in
Insights
Design deviates from other sizes of Brother Cycles Big Bro
Stack and Reach vs. Category Trend
View all sizes
Geometry
| Stack | 598mm |
| Reach | 392mm |
| Stack to Reach Ratio | 1.53:1 |
| Seat Tube Length, C-T | 406mm |
| Top Tube Length, Effective/Horizontal HT Top | 575mm |
| Top Tube Length, Actual C-C | 556mm |
| Top Tube Slope | 22.3deg |
| Head Tube Angle | 69.5deg |
| Seat Tube Angle | 73deg |
| Head Tube Length | 95mm |
| Bottom Bracket Drop | 60mm |
| Bottom Bracket Height | 308.2mm |
| Chainstay Length | 445mm |
| Chainstay Length Horizontal | 440.9mm |
| Front-Center | 644.9mm |
| Front-Center Horizontal | 642.1mm |
| Wheelbase | 1083mm |
| Fork Offset/Rake | 46mm |
| Fork Length (Axle-To-Crown) | 483mm |
| Trail | 88.6mm very high |
| Mechanical Trail | 83mm |
| Wheel Flop | 29.1mm |
| Standover Height | 782mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 106.7mm |
| 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 | 1819.4mm |
| 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/