We frequently get asked " will these wheels fit my Civic M?" or what does offset/pcd mean? So we put together this diagram page to make it eaier to understand, and make finding the right wheels for your Civic M a whole lot easier
This is the diameter of an imaginary circle drawn through the centre of the bolt holes. The P.C.D. of the wheel should match the P.C.D. that your car came with as standard.
P.C.D. is measured in mm. e.g: 4x100 means the wheel has 4 bolt holes and the diameter of the imaginary circle through the bolt holes is 100mm.
The image on the right shows the P.C.D.
The offset determines how far under the arch or how far towards the outer arch a wheel will sit. Each car has its optimum offset and a range within which the offset can be for the wheel to fit the car properly.
If the offset is too low for the range allowed, the wheel could stick out from the side of the car, if too high from what it should be the wheel may catch on the suspension or bodywork as it will be too far under the car.
This is due to the fact that if you put a wheel on your hub with a higher offset than before, the wheels bolting face will have to move further under the car to meet the hub, in extreme cases causing the wheel to sit too far under.
If you take a wheel and cut it in half and draw a line down the centre of the width of the alloy wheel the offset will be the distance between the back face (mounting face) of the wheel and the centre line that you have just drawn.
The offset is commonly shown as the letters ET followed by a number, eg: ET49. The offset is always measured in mm and can normally be found stamped on the back of the wheel or behind the centre cap (if fitted).
4x100 14" and 15" ( ET 45 )
CIVIC MA8 MA9 MB1 MB2 MB3 MB4 MB7 MB8 5 DOOR HATCHBACKS. MB9 & MC1 CIVIC AERODECK ESTATES
4x114 15" ( ET 55 )
CIVIC MB6 VTi AND VTiS 5 DOOR HATCH BACKS. MC2 CIVIC AERODECK VTi AND VTiS ESTATES