Hi all.
I have myself a Westfield with a set of 13" alloys with all 7" wide. The rears are running with 25mm spacers on.

I am looking to get myself a set of CXR alloys but i am unclear whether is should be getting then 7" wide all around or have the rears in 8"

Also, how do i work out which ET i should be getting or looking at?

Thanks
TooLate

nice site explain ET and how to calculate.

https://www.oponeo.co.uk/blog/wheel-width-and-et-offset-explained

Regarding your current question, you need to know the current wheel ET, then 'add' 25mm for the spacers. At that point you need to look at where the wheel is. How much space do you have at the rear (towards the middle of the car) and how much at the front (towards the pavement). You then can juggle the ET to fit the biggest wheel you want to. Although please check clearence when the wheel is going over a bump and the suspension is compressed. ie it doesn't rub inside the wheel arch.

Thanks MikeR!

I use

www.willtheyfit.com

Excellent site that tells you difference in speedo reading etc and a diagram of how the wheels will sit in the arch

https://www.willtheyfit.com

I believe i used the will they fit site as well, as it does look familiar

Hand have to say, that when i ordered my wheels, they were EXCACTLY what i was after, so proves doing your homework makes the job easier

steve