X5 50i LCI tire downsize to 18" possible?
 

Hi, guys. Can someone tell me if it is possible to downsize to 18" rims? The thing is my X5 has 20" 214 tires with 275 40 20 front and 315 35 20 rear. I want a new set of rims to do some light off road and winter driving, this 20" wheel set perform bad as soon as you exit the asphalt . Some people say the 50i has larger rotors and calipers than the 35i so the smallest rim is 19"...

The X5 50i comes with 18" wheels as standard. So your answer is "yes".

Cheers.

Thanks for the reply
In my country the 50i comes with 19" and bigger brakes than the 35i and the dealer tells me 19" is the smallest. Do you get bigger brakes in the 50i in USA?

In the USA there is only one brake rotor P/N for the X5 50i. Is your X5 a "security" vehicle (factory armored?)? I found alternative rotors for that vehicle in Europe (via realoem.com). No idea what the diameter is. Have your dealer show you the P/Ns for the different rotors. Or just ask them to test fit 18"s.

I am from south america but it is an euro spec car. Actually it is an aftermarket armoured car... but 50i have bigger brakes than 35i and 35d. I'll guess i must try the fitting.

Given that it is an armored vehicle I would expect the brakes to be larger. As you say - test fitting is your best option if you don't want to take your dealer at their word (which I wouldn't).

Cheers.