Suspension Wheel Rate Calculator
SI
Imp
Imperial
Inputs
View results
Spring rate
(k_s)
Installed spring rate.
lbf/in
Motion ratio
(MR)
Spring travel divided by wheel travel.
Installation angle
(theta)
Angle between spring force line and wheel travel direction.
°
Sprung corner mass
(m)
Sprung mass supported by this corner. Exclude unsprung wheel, tire, brake and part of the control arm when known.
lb
Results
Default result
Edit inputs
Wheel rate
(k_w)
160.6
lbf/in
Pass
Also computed
Ride frequency
(f)
Pass
1.43
Hz
Effective motion ratio
0.750
Method notes
2 notes
Motion ratio is spring travel divided by wheel travel; wheel rate follows the square of effective motion ratio.
Ride frequency is a linear sprung-mass estimate. Tires, bushings, damping, bump stops, anti-roll bars and progressive springs change the real response.
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