Club 80-90 Forums

I'm trying to work out the stock outside diameter for the tyres, but I'm getting conflicting info from the net.
The tyres I currently have on my alloys are massive, so I'd like to get it back to as near as normal as possible.

I think the stock wheel is 14" with 185 x 14 tyre?
If so, that's 643mm according some random tyre site.

Thing is, there seems to be 15" and 16" wheels, their listed tyres are about 674mm.

What am I missing?

All except 16" Syncros originally had 14" wheels, either 185/80r14 tyres or 205/70r14 tyres. Usually the 185s on steel 5.5" rims and 205s on alloy 6.0" rims.

The height of the tyre side wall come in different sizes. For example a 17" wheel with low profile side wall tyre could have the same diameter as a 14" wheel with taller side wall tyre. This side wall size is always written on the tyre. Such as 80, 55, 50 etc This number (side wall height) is actually a percentage of the tyres tread width. So for a given tyre width the lower the profile the smaller the overall diameter of the tyre will be.


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Thanks for the replys guys.
Think my mind is made up finally.
Just need to get em ordered.