2022 Why Cycles Big Iron Base S

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
611mm
Reach
427mm
Stack to Reach Ratio
1.43:1
Seat Tube Length, Unknown
355mm
Top Tube Length, Effective/Horizontal HT Top
574mm
Top Tube Slope
27.2deg
Head Tube Angle
68.2deg
Seat Tube Angle
74deg
Head Tube Length
116mm
Bottom Bracket Drop
64mm
Bottom Bracket Height
342.3mm
Chainstay Length
445mm
Chainstay Length Max
460mm
Chainstay Length Horizontal
440.4mm
Chainstay Length Horizontal Max
455.5mm
Front-Center
684.6mm
Front-Center Horizontal
681.6mm
Wheelbase
1122mm
Wheelbase Max
1137.2mm
Fork Offset/Rake
51mm
Fork Length (Axle-To-Crown)
490mm
Trail
107.6mm
very high
Mechanical Trail
99.9mm
Wheel Flop
37.1mm
Tire to Pedal Spindle Distance
With 170 mm cranks
108.3mm
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
1934.6mm
Suspension Type
Rigid, suspension corrected
Bar Type
Flat Bar
Frame Material
Titanium
Fork Material
Carbon/Composite
Brake Type
Disc
Features
Single-speed capable

Published Sizing Recommendations

Height
5 ft 1 in
to
5 ft 6 in
Source:https://www.whycycles.com/our-bikes/big-iron-fat-bike/