WHEEL OFFSET & FITMENT

Will they fit? Compare your current wheel and tyre with a new set: poke, inner clearance, track width, and the offset ↔ backspacing conversion. Plus a bolt-pattern (PCD) measuring tool.

Current wheel + tyre

New wheel + tyre

What moves where

Offset ↔ backspacing

Both describe the same thing. Backspacing is measured from the mounting face to the inner lip, so it moves with wheel width; offset (ET) does not.

WheelWidthETBackspacing
Backspacing (in) = (wheel width + 1") ÷ 2 + ET ÷ 25.4. The extra 1" is the two mounting flanges — wheels are 1" wider than their stated width.

Measure your bolt pattern (PCD)

Common bolt patterns

PCDImperialTypically
5x114.35x4.5"Wrangler TJ/YJ, most Japanese sedans/SUVs
5x1275x5"Wrangler JK / JL / Gladiator, Grand Cherokee
5x150Land Cruiser 200/300, Tundra, Sequoia
6x139.76x5.5"Hilux, Prado, LC70/80/105, Patrol, Ranger, Triton
6x135Ford F-150 2004+, Expedition
5x139.75x5.5"Older Jeep/Dodge solid-axle trucks
6x114.36x4.5"Navara D40, Frontier, some Mazda BT-50
Verify against your own hub — trims and model years differ. 5x114.3 and 5x120 look identical by eye and are not interchangeable.
Before you buy: negative offset increases the load on wheel bearings, ball joints and steering components, and changes scrub radius — the steering will feel heavier and tramline more. Check clearance to brake calipers (inner face), UCA/spring at full lock and full compression, and whether your guards need trimming. Hub-centric fitment matters: use hub rings if the wheel bore is larger than your hub.
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