bmwsam

Hey guys i have a 2009 bmw 528xi and just got aftermarket rims put on it yesterday and they are staggered style rims 20" xo miami wheels front 20✖8 rear 20✖10 and the tire size is 245 30 20 front 275 30 20 rear with brand new falken fk 452 tires and now the car drives hard and keeps pulling towards both sides
Please help

Sammy Adams

I always thought that the total wheel height on all four corners had to be pretty close to work on an xi. Looks like your fronts are a little shorter, so the fronts want to roll faster than the rears. (Mind you, that's a pretty uneducated guess).

H F

A 4 wheel alignment will do the trick....

BlaSTiWi

If those tire sizes are not typo you may have wrong tire sizes between front and rear ... you may want to choose either 35 profile front & 30 profile rear or on 20" maybe using 30 profile front & 25 (ouch!) profile rear.

xi/x-drive/AWD model is rather sensitive on rolling diameter discrepancy.

bmwsam

I mean the car does looks just a lil lower from the front then the back but i haven't got a alignment either the guy who installed them told me i don't need one or maybe he didn't know what the heck was he doing, do you think that would make any difference
And thank you for all your help

bmwsam

Yeah thats what most of the people told me to go with 245 35 20 on the front to make it even i have no idea how this is possible lets see what happens thank you for your help

BlaSTiWi

You need alignment when changing suspension part(s) not when changing wheels/tires. Your tire size(s) are the issue if you gonna use same 30 profile you have to use the same width otherwise the sidewall height will be different and it'll change the rolling diameter and confuse (maybe even damage) the x-drive.

bmwsam

so you think going with 245 35 20 on the front would solve the problem cause i wouldn't want to go with 25 on the back that's going to make the ride quality even shitty

08n54

Yeah you have to go with a 35 tire up front. When i first got my car i did the same thing, i didn't know i had to have the same rolling diameter. You definitely have to change those front tires.

bmwsam

ok that's what i'm going to do then cause they way its pulling it didn't feel like the alignment at all i mean i am not a mechanic but i been driving for long enough to tell the difference and thanks alot guys for all your help best thing i did signed up for this forums website. I did called the dealer and i kept telling him that this whats going on and the only thing he suggested was a alignment but thank you again for all the help