Compare verified lug-pattern and center-bore dimensions. This is a mounting-dimension screen, not a complete wheel-fitment or safety approval.
Pattern reads lugs × bolt-circle diameter: 5×120 = five lugs on a 120 mm circle. Verify both values for the exact model year, trim, brake package, and market.
Slip-on Spacer Check
Lug Thread Engagement
Arithmetic only: hub-pilot contact also depends on the wheel chamfer and spacer geometry. Get the required engagement, hardware type, torque, spacer approval, and re-torque procedure from the vehicle, wheel, and hardware manufacturers.
This screen compares lug count, bolt-circle diameter (PCD), and center bore. Complete fitment also requires the correct load rating, diameter, width, offset, fastener seat and length, brake and suspension clearance, tire specification, and manufacturer approval.
A centering mismatch can contribute to runout or vibration, but the correct remedy depends on the mounting system. Follow the wheel maker's installation instructions.
A different bolt pattern fails the direct-mount screen. An adapter changes effective offset by its measured thickness and changes the load path and hardware stack. This tool does not approve adapters or alternate fasteners; use only components explicitly approved for the exact application.
For 4- and 6-lug wheels, measure center-to-center across opposite holes. For 5-lug, measure from the back of one hole to the center of the second-farthest hole - or just count lugs and measure to the nearest known pattern; production patterns are standardized (100, 108, 112, 114.3, 120, 120.65, 130 mm).
Manufacturers can change wheel dimensions between generations, trims, brake packages, or markets. Do not infer fitment from the badge or chassis family; verify the exact vehicle and wheel specifications.
A slip-on spacer moves the wheel outward by its thickness. With unchanged hardware it also reduces nominal thread engagement by that thickness. The measurement panel helps quantify those changes; it does not set the required minimum.
Do not assume that adding spacer thickness to bolt length approves a setup: seat type, shank geometry, bottoming clearance, material, torque, and thread condition all matter.
Suppose verified vehicle specifications list 5×120 and a 72.6 mm hub, while the candidate wheel maker lists 5×120 and a 74.1 mm bore. The two checked dimensions pass, and the bore difference is:
The arithmetic ring size is 74.1 mm outer × 72.6 mm inner. Confirm that the wheel manufacturer specifies a ring and that its material and geometry suit the wheel and hub. Then separately verify load rating, offset, brake clearance, fastener seat and length, tire, and torque requirements.
Use the specification for the exact model, model year, trim, brake package, and market from the owner's manual, service information, wheel manufacturer, or vehicle placard. Brand-wide rules are unreliable because dimensions can change within a model line.
PCD stands for pitch circle diameter - the diameter of the imaginary circle that passes through the center of every lug hole, written together with the lug count as e.g. 5x120. For 4- and 6-lug wheels, measure straight across from the center of one hole to the center of the hole directly opposite. For 5-lug wheels there is no opposite hole, so measure from the back edge of one hole to the center of the second-farthest hole, then match to the nearest standard pattern.
A hub-centric mounting locates the wheel with the hub pilot; a lug-centric design locates it through the specified fastener seats. Neither label alone approves a wheel. Follow the vehicle and wheel manufacturers' centering method, hardware, torque, and fitment instructions.
A larger bore passes this one dimensional check and may use a correctly specified hub ring, but that does not approve the wheel. Confirm the wheel maker's mounting method, load rating, hardware seat, brake clearance, offset, and vehicle requirements. A wheel bore smaller than the hub flange cannot seat directly.
No. An adapter or spacer changes effective offset and may change hub-pilot and fastener engagement. Use only components explicitly approved for the vehicle, wheel, load, and intended use, and follow their installation and re-torque instructions.
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