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Additional Wheel / Measurement Information
Key Identifying Wheel Dimensions: Wheel Bolt or Lug Pattern (or bolt circle, lug circle, lug pattern, etc.) is the measured diameter of an imaginary circle formed by the centers of the wheel lugs or bolt holes. Bolt patterns can be 3, 4, 5, 6, 7, 8 or 10 lug holes. A bolt circle of 5 x 4.5 would indicate a 5 lug bolt pattern on a circle with a diameter of 4.5 inches.
Wheel Dimensions
There are four important measurements that are used to categorize and identify a wheel for fitment purposes.
Rim Diameter
The actual diameter of the wheel at the point where the tire bead seats (NOT the outer lip of the rim).
Rim Width
Measure from the inside of the outer lip at the bead seating point to the inner lip.
Back Spacing
From the inside of the wheel at the point where it contacts the hub, brake drum or axle flange to the inside edge (lip) of the wheel.
Bolt Pattern
The measured diameter of an imaginary circle formed by the centers of the wheel lugs or bolt holes.
How To Measure Wheel Bolt Pattern
If there is an EVEN number of lugs: Measure center-to-center on lugs directly across from each other.
If there is an ODD number of lugs: Measure from the CENTER of one lug to the OUTER EDGE of the hole diagonally across from it.
Lug Nut Types
Common Bolt Pattern Conversions
4-100
4x3.94
4-108
4x4.25
4-110
4x4.33
4-114.3
4x4.5
5-100
5x3.94
5-108
5x4.25
5-110
5x4.33
5-112
5x4.41
5-114.3
5x4.5
5-115
5x4.52
5-120
5x4.72
5-120.7
5x4.75
5-127
5x5
5-130
5x5.12
5-135
5x5.3
5-139.7
5x5.5
6-114.3
6x4.5
6-127
6x5
6-135
6x5.3
6-139.7
6x5.5
8-165.1
8x6.5
8-170
8x6.69
This information is accurate to the best of our knowledge. No warranties or guarantees are expressed or implied as to the accuracy of the information provided on this site. Use of this site constitutes your agreement to these terms.
See Also:
How to Measure Bolt PatternBolt pattern - diameter of an imaginary circle formed by the centers of the wheel lugs.
Wheel, Tire and Fender Fitment CalculatorCalculate Wheel Fitment, Tire Stretch and Rolling Radius. includes Speedometer Error Calculator. Play with specs, try different settings and combinations, compare results.
Tire Size Change / Speedometer Calibration CalculatorThis calculator is designed to give information related to tire size changes and the general impact they have on the calibration of a speedometer. It determines speedometer error and tire size information based on published and generally accepted tire dimensions as given by the standard US tire system (i.e. 205/45-ZR16). All calculations are based on the assumption of a new tire (as opposed to used) where the numbers on the tire accurately represent the dimensions.
