2018 Brother Cycles Big Bro Base Small (16)

Build

650B/27.5 in × 3 in

Insights

Somewhat upright stack and reach vs trend of rigid mtb bikes
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/