Is a 265 rear tire too small for a 20x10 rear rim for my 535i sport pack car??

Is 275 or 285 better or will i not notice the difference?

 

265 for a 10 inches wide rim will result in a tire stretch. So, unless you're going for a stretch look, go with 275 or even 285. I have a 10.5 inch wide rims with 285 tires and it looks great (without stretch) but no protection to the rims. If you want some protection for your rims, go with meaty tires

 

I have 275/30/20. Works great.

 

i have 285 25 on my 10.5 and the wheel is just flush with tire edge, but 25 series is a fuckin rubber band and rides like shit. i love the stereched look myself and was thinking of doinf 265 35 20 on my next tire. i know its not ideal size but the extra sidewall is what im concerned with. and the flush wheel/fender look if i can squeeze a small spacer on would look cool