Originally Posted by KEEPER

HELLO. (Hi :x5world

I have got a question i can't figure out.


My BMW X5 4.6 IS has now rims of this size
Front:
BMW 275/40 R20
6 7535 16? (don't know)
E9 1/2J
X20EH2? (don't know)
IS45? (wheel offset in mm)

REAR:
BMW 315/40 R20
6 7535 17? (don't know)
E10 1/2
IS30? (wheel offset in mm)

I HAVE ALSO GOT 4 TIRES OF SIZE 275/40 R 20


????? mY QUESTION IS: WHAT ARE THESE OBRIVIATIONS MARKED BY QUESTION SIGN STAND FOR????? (see above)
AND WILL THE SIZE LISTED ABOVE PERFECTLY FIT THE SIZE OF TIRES WITH 275/40 R20 TO CONSIDER THE RIMS ARE A LITTLE BIT DIFFERENT IN WIDTH??? (275 tires will fit 10.5" rear rims but try to stay with staggered tires if you use staggered wheels)

AND ONE MORE WHAT IS THE DIFFERENC IN IS 45 AND IS 30 REGARDING RIMS? (the difference is the wheel offset dimension. Wheel offset explained here: http://www.tirerack.com/wheels/tech/techpage.jsp?techid=101) AMD WILL FOR EXAMPLE RIMS OF FRONT SIZE FIT THE REAR? (yes)