[italiantank26]

I have a 2008 128 coupe on stock suspension. I just bought new wheels and tires from my local town fair tire store. Relatively inexperience when it comes to wheel sizing, so any input appreciated. I will run a staggered setup. For my rears the tires will be 265/35R1/18w and for front; 225/40R1/18w. I can provide more fitment info if needed. I mainly have two questions, is 265 too wide for the rears? The salesperson said it should be fine but I find I have more trust in the BMW community. My second question is what does the second measurement mean, 35R1 and 40R1, and why do the two differ? I only made a downpaynent on the package so if flaws in the measurements do exist I can tell town fair immediately, otherwise I'll just be waiting for two months to recieve a setup that would never fit.