i just installed 08 550 bumpers on my 07 530 the m-tech bumpers...they look sick ill post picks...and i got 4 replica m5 rims..the rims are 20 inches and was wondering what size tires should i get...i want something that wont rub and wont pop too often...the tire shop told me front 245/25/20 back 275/20/20...but i think thats too low and my tires will pop often...so im thinking 30 and 25 instead..what are your recommendations wut should i do.....i just need to install my rims and im done got spoilers and everything ill post pics when im done...

 

according to rolling diameter, depending also on the widths of those wheels, yes the recommended sidewalls are 30 and 25. some roll with sidewalls of 35 and 30 for the thicker sidewall for more rim protection, but with more chance of rubbing. if you were to ever rub though, rolling the fenders would cure the problem.

 

thanks for the info....ill go ahead and get the 35 30..cuz i dotn want to chnage tires every 6 months...cost me 900 for 4 brand new pirrelis. ill ask them to roll my fenders.