245/45/18 tyres on an R3
 

I've inherited some 245/45/18 winter tyres (used on my brother's Jaguar XF). My aim is to sell them and buy some 225/45/18s for my R3 (I've got a set of 235/35/19 and 255/35/19 on rims for my Series1 project car).

However, as a back-up I'm tempted to fit them if I can't find any 225/45/18s at a reasonable price. I know that these tyres are the wrong size, I think I know all the potential pitfalls of fitting them and I've done a search of the site here and In the UK. A search showed that a few people have posted as fitting them without problems on Series 1s, but that may not be true for R3s and the latest post was 8 years ago.

Has anyone had any direct experience or knowledge of fitting 245/45/18 tyres on an R3? (please no comments on theory though, I've been through that).

If you are stock suspension, with stock 18x8 +50 wheels, then it should fit without issue. The rolling diameter of the tire will be larger than stock, causing the speedometer to measure slower than your actual speed.

If you are running lowering springs or different offset wheels (or different width), then you could have problems. Provide your suspension information and wheel setup for confirmation.

im running 245/45/18's on stock ms3 wheels atm with no issues.

and also ran 255/35/19's on my stock r3 rims without any rubbing issues at all, and to ms3 rims def are sucked in more than my 19's so i dont think you'll have any issues

Stock everything with 245/45/18 is ok. I pray that you wouldn't be putting them on r3 wheels though. Maybe on s1 wheels....

Guys, thanks.

I've bodged the odd thing over the years but getting these tyres on R3 rims is beyond me.

I'm spoilt for choice for rims as I have 2 good options, either 40th Anniversary or PZ (made by OZ for a UK special edition modified by Prodrive). I've not decided which yet.
40th Anniversary: https://dl.dropboxusercontent.com/u/...y/IMG_0354.JPG
PZ:https://dl.dropboxusercontent.com/u/...y/IMG_0235.JPG

you'd be surprised how uneducated some people can be