Originally Posted by
MR-4Door-SR20DET It looks like their automated hub diameter calculations are wrong.It looks wrong to me too. Our wheel hub bore diameter is 59.0mm
Originally Posted by
MR-4Door-SR20DET I thought it suppose to be 59.0 mm for our cars meaning that we should get a centric ring that has a 59.1mm measurement?You're close, but you've gone the wrong way. The wheel hub bore diameter is 59.0mm and the actual hub is 58.9mm.
If you have a wheel with a larger hub bore you will want the adapter to be 59.0mm on the inside diameter (same as our wheels) and then you will want the larger outside diameter to be the size of your current, new wheels. What ever your wheel hub bore is you will want to subtract 0.1mm from that dimension to get the measurement for your adapters. So if you have a wheel with a hub bore of 65mm you'll want your adapters to be 64.9mm on the outside.
Originally Posted by
MR-4Door-SR20DET I didn't have much luck getting a accurate wheel bore measurement on my own. Any of you guys take your wheels to a shop?I don't think a typical wheel shop or tire mounting place is going to have the right tools for this. You'll need to take your wheels to a machine shop to get a correct measurement, or do it yourself with a micrometer. Sorry, no shortcuts.
Originally Posted by
MR-4Door-SR20DET Great chart I found to go by. It has the correct O.D. and I.D.That chart seems to go against what I've told you. They seem to have the inside diameter set larger by 0.1mm and that doesn't mesh with what I've experienced with our setups. Trust me when I say you want the inside diameter of your adapter to be 59.0mm exactly. Not 59.1mm. The wheel spacers I made were 59.0mm on the inside diameter and they fit over the hub perfectly. The outside diameter I made them was 59.0mm as well and that ended up being a tiny bit too big for the wheel bore so I had to take them down 0.1mm and should have made the outside diameter 58.9mm to begin with.