Automotive Calculators
Wheel Offset Calculator
Calculate wheel backspacing and understand how ET offset affects your wheel's position relative to the suspension and fenders.
FreeET & BackspacingFitment GuideNo sign-up
Wheel Dimensions
inches
mm
Positive Offset: Wheel sits inward — stock-style fitment
Backspacing
5.38"
distance from hub to inner edge
Backspacing
5.38"
inboard clearance
Frontspacing
2.62"
outboard position
Offset (ET)
35 mm
positive
Rim Width
8"
bead seat to bead seat
Changing to a higher offset (more positive ET) brings the wheel inward. Lower offset pushes it outward. Always check clearance against suspension and fenders before purchasing.
How Wheel Offset Works
Backspacing (in) = (Rim Width × 0.5) + Offset (mm converted to inches). A higher backspacing value means the wheel sits farther inward. Lower backspacing pushes the wheel outward — popular for lifted trucks with larger tires.
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