[Roach1]

I also have staggered wheels would I have to have a staggered setup for winter tires? Is it better or worse ?

[alohasurftoad]

Originally Posted by Roach1

Damn that's a lot to take in lol. So would any 18" for or they have to be these exact specs?

F3/4 series bolt patter is 5x120. if the wheel has a centerbore that's smaller than 72.56 it will not fit over the hub. if the cb is larger, hubcentric rings are recommended but not absolutely necessary. there are numerous choices of OEM and aftermarket wheels with specifications in 18"x 8" or 8.5" and offsets between ET30-ET38.

[Roach1]

Originally Posted by alohasurftoad

F3/4 series bolt patter is 5x120. if the wheel has a centerbore that's smaller than 72.56 it will not fit over the hub. if the cb is larger, hubcentric rings are recommended but not absolutely necessary. there are numerous choices of OEM and aftermarket wheels with specifications in 18"x 8" or 8.5" and offsets between ET30-ET38.

Can the diameter be 245?

[Roach1]

Originally Posted by alohasurftoad

F3/4 series bolt patter is 5x120. if the wheel has a centerbore that's smaller than 72.56 it will not fit over the hub. if the cb is larger, hubcentric rings are recommended but not absolutely necessary. there are numerous choices of OEM and aftermarket wheels with specifications in 18"x 8" or 8.5" and offsets between ET30-ET38.

What does et stand for and is it a must ?

[alohasurftoad]

Originally Posted by Roach1

What does et stand for and is it a must ?

all wheels have an ET or offset associated with them. it is alternately denoted with a + or -, i.e. +35. it is distance from the hub mounting surface to the centerline of the wheel barrel.

higher offset is tucked in, lower offset is further out. if offset is too high, tires may rub something within the fenderwell i.e. struts or wheel spoke may contact the brake caliper. too low may result in the tires rubbing the outside fender lip or fenderwell liner while turning. excessive offset deviation changes suspension geometry, scrub radius and track width and may positively or negatively affect turning, handling, braking, and spring rate, depending on how far you're deviating, if it's outwards or inwards from the factory offset and depending if it's front or rear. use of spacers lowers offset.

OEM is ET34 or ET36 front and ET47 for the rear on staggered setups and ET34 all around for square setups.

please use google or [search] function for "wheel offset" to further inform yourself on this matter.

[Roach1]

Originally Posted by alohasurftoad

look for wheels and tires with these specs...18x8" or 8.5" ET35ish with 235/45/18 or 225/45/18 square. bolt pattern is 5x120 and centerbore 72.56mm or larger with hubcentric rings, if larger.

Quick question would 40 ET be too big ? Would I need rings for that or should it be fine ?

[Roach1]

Originally Posted by alohasurftoad

all wheels have an ET or offset associated with them. it is alternately denoted with a + or -, i.e. +35. it is distance from the hub mounting surface to the centerline of the wheel barrel.

higher offset is tucked in, lower offset is further out. if offset is too high, tires may rub something within the fenderwell i.e. struts or wheel spoke may contact the brake caliper. too low may result in the tires rubbing the outside fender lip or fenderwell liner while turning. excessive offset deviation changes suspension geometry, scrub radius and track width and may positively or negatively affect turning, handling, braking, and spring rate, depending on how far you're deviating, if it's outwards or inwards from the factory offset and depending if it's front or rear. use of spacers lowers offset.

OEM is ET34 or ET36 front and ET47 for the rear on staggered setups and ET34 all around for square setups.

please use google or [search] function for "wheel offset" to further inform yourself on this matter.

I just saw this after I posted my last post. So I reckon 40 et would be deviating too much from the OEM standard of 34 et for a square winter setup .

[alohasurftoad]

Originally Posted by Roach1

I just saw this after I posted my last post. So I reckon 40 et would be deviating too much from the OEM standard of 34 et for a square winter setup .

+40 with narrowish winter tires is fine. It will be a bit tucked in appearance and sling less crap up the sides of your
car. see wdeerfields car, https://f30.bimmerpost.com/forums/sh...0&postcount=15
.

[Roach1]

Originally Posted by alohasurftoad

+40 with narrowish winter tires is fine. It will be a bit tucked in appearance and sling less crap up the sides of your
car. see wdeerfields car, https://f30.bimmerpost.com/forums/sh...0&postcount=15
.

A found a set of tires off a 2017 435i the seller sent me a pic of the bore seems to be 2.75 inches which is too small but if they are off a 2017 435 it should have the same bore size as my car. I'm trying to attach a picture to show you but this thing won't let me . How do you attach files? Sorry I'm a rookie.

[alohasurftoad]

using a tape ruler like that is too inaccurate. you need to measure with a vernier caliper. from the pic, it looks like it could be 72.56mm.

[M Smurf]

Originally Posted by kwatz_06

Can we put 17" on 328i XDrive (M-Sport Pack) for winter or 18"?

If you don't have M Sport brakes, 17s should fit despite what all the tire sites claim. 17s will perform better in snow and obviously significantly cheaper