The Wheel CalculatorGuideWill those wheels fit?
Use our free tool to check if your new aftermarket wheels or rims and tires will fit your vehicle. Enter the wheel and tire sizes to find the perfect fitment and avoid issues such as poke, inset and rubbing. We'll even calculate potential speedometer error. Try it now and find your perfect fitment.
Get started by adding your current wheel specs, then compare them to new ones.
Fig. 1 · Fitment
Current
New setup
*The strut in diagram is only there for illustrative purposes, real distances will differ so make sure to measure.
01Base
Current17x7 ET48 / 205/45R1702Vs base
New setup18x8 ET35 / 225/40R18Wheel
Diameter in
Width in
Offset ET
Tire
Width mm
Profile %
FitmentIdeal sizeIdeal for 8" rim: 225–235 mm
PCD opt.
New setup vs Current
Overall diameter+20.9mm637.2 mm total
Poke+25.7mmFace sits further out
Inset−0.3mmFurther from the strut
Ride height+10mmFrom diameter change
Speedo error-3.39%Reads 29 at 30, 58 at 60 mph
Tire fitmentIdeal sizeIdeal on 8": 225–235 mm
New setup's overall diameter (including the tire) is 20.9 mm bigger than Current.
New setup's face will poke out 25.7 mm more than Current.
New setup has an inner rim which is 0.3 mm further away from the suspension strut than Current.
All setups · mm
Current
New setup
Overall diameter
616.3 mm
637.2 mm
Circumference
1936.2 mm
2001.8 mm
Poke
40.9 mm
66.6 mm
Inset
136.9 mm
136.6 mm
Speedo error
0%
-3.39%
Speedo at 30 mph
30
29
Speedo at 60 mph
60
58
Ride height change
0 mm
10 mm
Arch gap change
0 mm
-10 mm
Tire fitment
Ideal size
Ideal size
Tire size
205/45R17
225/40R18
Wheel size
17x7 ET48
18x8 ET35
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