Nearly every wheel fitment question starts with the bolt pattern. Get it right and the rest of the selection follows.
A bolt pattern is written as two figures, for example 5x114.3. The first figure is the number of lug holes. The second is the pitch circle diameter, usually shortened to P.C.D., which is the diameter of the circle that passes through the centre of every lug hole.
So 5x114.3 means five holes on a circle 114.3 mm across. The same pattern written in inches is 5x4.5, because 114.3 mm is exactly 4.5 inches. Both forms appear in the MAMA WHEEL product listings, which is why sizes such as 5x114.3 and 5x4.5 sit side by side.
Several of the patterns in the catalogue are the same circle expressed in two unit systems. Knowing the pairs saves a lot of confusion when comparing a wheel with a hub.
4x114.3 is 4x4.5. 5x114.3 is 5x4.5. 5x120.65 is 5x4.75. 5x127 is 5x5. 5x139.7 is 5x5.5. 6x139.7 is 6x5.5. 8x165.1 is 8x6.5. These pairs all appear in the published P.C.D. lists.
On a 4, 6 or 8 lug hub, the holes sit opposite each other in pairs. Measure from the centre of one hole straight across to the centre of the hole opposite. That figure is the P.C.D. directly.
Measure to the hole centres rather than to the edges, and take the measurement two or three times on different pairs to make sure the reading is consistent.
Five lug patterns have no hole directly opposite, so the direct method does not work. The usual approach is to measure from the back edge of one hole to the centre of the hole two positions away, then compare the result against the standard sizes.
Because five lug sizes such as 5x112, 5x114.3 and 5x120 are close together, a measured figure should always be checked against the vehicle specification before ordering. If you are not certain, send the vehicle make, model and year with your enquiry.
Two wheels can share a bolt pattern and still not fit. The centre bore has to clear the hub spigot, the offset has to keep the wheel inside the arch, and the seat shape of the nut or bolt has to match the wheel.
That is why a spacer, adapter or ring enquiry asks for the P.C.D., the centre bore, the thread size and the thickness together rather than for the bolt pattern on its own.
FAQ
It is simply the decimal part of the millimetre figure. 114.3 mm is the exact metric equivalent of 4.5 inches, which is why the same circle is written both as 114.3 and as 4.5.
Not directly. The two pitch circles are different, so a double drilled wheel adapter would be needed to convert one pattern to the other.
4 lug, 5 lug, 6 lug and 8 lug patterns are published across the spacer range, in both metric and imperial form.
Yes. The centre bore decides whether the wheel can seat on the hub at all, and whether a hub centric ring is needed.
Related Products
Wheel SpacersBillet 6061-T6 aluminium spacer from 15 mm to 65 mm, in 4, 5, 6 and 8 lug patterns, including ATV and UTV.
View details →
Wheel AdaptersP.C.D. converted wheel adapter with a published 36 row conversion chart for 5 lug patterns.
View details →
Wheel SpacersAnodised hub centric wheel spacer adapter in seven colours, 10 mm to 65 mm, in 4, 5, 6 and 8 lug patterns.
View details →Once you have the bolt pattern, the centre bore and the thread size, email them across and we will confirm the part.
