2021 Why Cycles Big Iron Base Large

Build

650B/27.5 in × 4.5 in

Insights

Average stack and reach vs trend of rigid fatbike bikes

Stack and Reach vs. Category Trend
View all sizes

Geometry

Stack
620mm
Reach
457mm
Stack to Reach Ratio
1.36:1
Seat Tube Length, C-T
457mm
Top Tube Length, Effective/Horizontal HT Top
628mm
Top Tube Slope
17.2deg
Head Tube Angle
68.7deg
Seat Tube Angle
73deg
Head Tube Length
128mm
Bottom Bracket Drop
64mm
Bottom Bracket Height
342.3mm
Chainstay Length
445mm
Chainstay Length Horizontal
440.4mm
Front-Center
723.5mm
Front-Center Horizontal
720.6mm
Wheelbase
1161mm
Fork Offset/Rake
51mm
Fork Length (Axle-To-Crown)
490mm
Trail
103.7mm
very high
Mechanical Trail
96.6mm
Wheel Flop
35.1mm
Tire to Pedal Spindle Distance
With 170 mm cranks
147.2mm
Pedal Spindle to Ground Clearance
With 170 mm cranks
172.3mm

Base Build

Wheel Size
650B, 27.5 inch (584mm BSD)
Tire Width
4.5in
Tire Outer Diameter
812.6mm
Bike Length with Tires
1973.6mm
Suspension Type
Rigid, suspension corrected
Bar Type
Flat Bar
Frame Material
Titanium
Fork Material
Carbon/Composite
Brake Type
Disc

Published Sizing Recommendations

Height
5 ft 9 in
to
6 ft 2 in
Source:https://www.whycycles.com/our-bikes/big-iron-fat-bike/