Wheel offset chart
Offset positions in common use, measured on an 8J wheel from the hub face. Change width and every edge figure shifts, but the movement between one ET and the next stays the same.
| Offset | Type | Outer edge | Inner edge | Typically found on |
|---|---|---|---|---|
| ET0 | Zero | 101.6 mm | 101.6 mm | Deep dish, heavily modified |
| ET10 | Positive | 91.6 mm | 111.6 mm | Deep dish, heavily modified |
| ET15 | Positive | 86.6 mm | 116.6 mm | Aggressive, often needs arch work |
| ET20 | Positive | 81.6 mm | 121.6 mm | Aggressive, often needs arch work |
| ET25 | Positive | 76.6 mm | 126.6 mm | Aggressive, often needs arch work |
| ET30 | Positive | 71.6 mm | 131.6 mm | Common on wider OE and aftermarket |
| ET35 | Positive | 66.6 mm | 136.6 mm | Common on wider OE and aftermarket |
| ET38 | Positive | 63.6 mm | 139.6 mm | Common on wider OE and aftermarket |
| ET40 | Positive | 61.6 mm | 141.6 mm | Common on wider OE and aftermarket |
| ET42 | Positive | 59.6 mm | 143.6 mm | Common on wider OE and aftermarket |
| ET45 | Positive | 56.6 mm | 146.6 mm | Typical front-wheel drive |
| ET48 | Positive | 53.6 mm | 149.6 mm | Typical front-wheel drive |
| ET50 | Positive | 51.6 mm | 151.6 mm | Typical front-wheel drive |
| ET55 | Positive | 46.6 mm | 156.6 mm | Typical front-wheel drive |
| ET60 | Positive | 41.6 mm | 161.6 mm | Typical front-wheel drive |
Reading the chart
Every 10 mm down the ET scale moves the wheel 10 mm further out and 10 mm further from the strut. The outer and inner columns show where the rim edges sit relative to the hub face on an 8-inch wheel; on a 9-inch wheel both edges move 12.7 mm further out from the centreline, half an inch split evenly.
The "typically found on" column is a rough guide to where these offsets appear, not a rule. Plenty of cars run offsets outside their usual band from the factory.
The one comparison that matters
Offset only means something relative to what the car came with. ET45 is not inherently correct or aggressive — it is 10 mm further in than ET35 and 10 mm further out than ET55. Find your standard offset first, then read the chart as a distance from it. The offset comparisons do that arithmetic for each pair.
Related
How are these fitment figures calculated?
Fitment North calculates declared wheel and tyre geometry from the dimensions shown on the page, using the same tested method as the wheel-offset and tyre-size calculator. Tyre diameter uses rim diameter plus two calculated sidewalls; offset comparisons split width changes across inner and outer edges before applying the offset difference. Results are measurement aids, not vehicle approval. Confirm ratings, clearances and manufacturer guidance before fitting parts.