I know there are already many forums on what size wheels fit and what people recommend, but nothing I can find is specifically what I want.
What I am trying to figure out is how wide of a wheel can I go, without any cutting fenders and little to no rubbing, to just get the wheels to poke out of the fenders a little. I have a 2012 MC JCW R56 and I know the stock wheels on a JCW R56 is 17x7. I don't want to change the diameter of the wheel, just the width, they are a bit skinny in my opinion and personally, it would look better wider. I have stock suspension and brakes that come on it. I don't know if 17x8 is wide enough and more importantly, will it fit? I don't fully understand wheel/tire sizing and I don't know what offset will fit on the Mini too or if it is even possible to do what I want. If anyone understands and has more knowledge I would appreciate your help. Thank you.

 

Stock rims are 17x7 with a +48 offset
Stock tire size is 205/45-17

Go to this site to compare fitment with what you would like to get:
https://www.wheel-size.com/calc/

That site requires that you take some measurements of your car, and the current wheel-tire fitment, but I think its the best for comparing upgrades. The only variable it doesn't account for are changes in alignment specs.


That all being said, if you only want a wider look, you can step up to a 215/45-17 tire size and add some 8-10mm spacers pretty easily, and keep your stock wheels. That would probably be the least expensive option.There isn't a ton of room inside the Mini wheel wells for wider wheels without adjusting or modifying something. But, it doesn't take much to improve the handling, either.

 

Oh great! Thank you this website helps a lot. Are wheel spacers reliable?

 

17x8 et 40(ish) is kind of the sweet spot. Will push them right out to the fender edge.

That said, spacers are ok so long as they are quality pieces (i.e. - ECS, not eBay) and they are installed properly (locktite, torque wrench, ect)