2018 Specialized Bicycles Fatboy 20 Base 20.0

Build

20 in (406) × 4 in

Insights

Average stack and reach vs trend of kids mtb bikes

Stack and Reach vs. Category Trend
View all sizes

Geometry

Stack
464mm
Reach
319mm
Stack to Reach Ratio
1.45:1
Seat Tube Length, C-T
280mm
Top Tube Length, Effective/Horizontal HT Top
470mm
Top Tube Slope
26deg
Head Tube Angle
69deg
Seat Tube Angle
72deg
Head Tube Length
120mm
Bottom Bracket Drop
25mm
Bottom Bracket Height
279.6mm
Chainstay Length
390mm
Chainstay Length Horizontal
389.2mm
Front-Center
526mm
Front-Center Horizontal
524.8mm
Wheelbase
914mm
Fork Offset/Rake
35mm
Fork Length (On-Axis)
360mm
Trail
79.4mm
high
Mechanical Trail
74.2mm
Wheel Flop
26.6mm
Standover Height
583mm
Tire to Pedal Spindle Distance
With 170 mm cranks
51.4mm
Pedal Spindle to Ground Clearance
With 170 mm cranks
109.6mm

Base Build

Wheel Size
20 inch (406 BSD, BMX/Kids) (406mm BSD)
Tire Width
4in
Tire Outer Diameter
609.2mm
Bike Length with Tires
1523.2mm
Suspension Type
Rigid, non-suspension corrected
Bar Type
Flat Bar
Frame Material
Aluminum
Fork Material
Aluminum
Brake Type
Disc
Source:https://www.specialized.com/us/en/fatboy-20/p/133899