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[Matt_UKTX]

Hi,

I'm looking at buying some aftermarket rims and tires for my 2006 330i (E90), and I'm trying to figure out the offsets, and whether or not I need spacers.

I have the non-sports package 330, with 17 inch rims as standard. I'm upgrading to an 18"x8.5" rim with a 40mm offset. I'm doing a non-staggered set up so I can rotate my tires.

My question is what kind of spacers I need for the rear. I want to make sure there is no rubbing. I was thinking that 10mm will be enough to avoid the tucked in look without any risk of rubbing, or should I go for 15mm? Would it be any different if I go for 19's instead of 18s?

Do I also need spacers on the fronts or will the 40mm offset be OK with no risk of rubbing?

Finally, what brand of spacer should I go for? I want to make sure that all the lug nuts match.

Thanks in advance for your help.

Matt.

[Matt_UKTX]

Originally Posted by carlitosz

Matt,

I always recommend two things:
1) Always buy wheels that are meant for your vehicle.
2) If they are not available, wait for them.

However, if you are decided on going with those wheels a 40mm is a big offset for your rear. You would need at least 20mm to make look ok.

Hope to have answer you question.

I'm sorry but this makes no sense to me. A 20mm would not fit my car. The factory wheel has a 34mm or 37mm offset. The M3 offset (which is very aggressive on an E90 is 22mm). Most aftermarket wheels have a 40mm offset.

On Tire Rack all the wheels have a 40mm that fit the E90, so I am confused about your comment on waiting for the "wheels that are meant for my vehicle". Basically, that would mean not changing from anything other than a factory wheel that ships on the E90.

Anyone else care to provide some input? I'd like to order my rims, tires and spacers this morning. Thanks!

you would need about a 5mm upfront and 20mm in the rear.

with my 15mm rear spacers on a +38 offset wheel according to the calculation on the top of the page.. my wheels extend 27mm outward compared to my stock wheels

[HRC]

Originally Posted by Matt_330i

Hi,

I'm looking at buying some aftermarket rims and tires for my 2006 330i (E90), and I'm trying to figure out the offsets, and whether or not I need spacers.

I have the non-sports package 330, with 17 inch rims as standard. I'm upgrading to an 18"x8.5" rim with a 40mm offset. I'm doing a non-staggered set up so I can rotate my tires.

My question is what kind of spacers I need for the rear. I want to make sure there is no rubbing. I was thinking that 10mm will be enough to avoid the tucked in look without any risk of rubbing, or should I go for 15mm? Would it be any different if I go for 19's instead of 18s?

Do I also need spacers on the fronts or will the 40mm offset be OK with no risk of rubbing?

Finally, what brand of spacer should I go for? I want to make sure that all the lug nuts match.

Thanks in advance for your help.

Matt.

Matt, 18" and 19" has no effect on offset, so no worries there. For the rears, with an 8.5" rim, 10, 12 or 20mm would work. If you lower the car and are worried about rubbing, 12mm would be fine. For the fronts, it says you get 12mm less room on the inside, you may need spacers, but if you do, only 5 or 10mm.

H&R, Eibach and Rogue all make spacers. Rogue gets there bolts from Tirerack. They use silver bolts. So if you get spacers for the the rear only from them, you will have black and silver going on.

Danny

[Matt_UKTX]

Originally Posted by HRC

Matt, 18" and 19" has no effect on offset, so no worries there. For the rears, with an 8.5" rim, 10, 12 or 20mm would work. If you lower the car and are worried about rubbing, 12mm would be fine. For the fronts, it says you get 12mm less room on the inside, you may need spacers, but if you do, only 5 or 10mm.

H&R, Eibach and Rogue all make spacers. Rogue gets there bolts from Tirerack. They use silver bolts. So if you get spacers for the the rear only from them, you will have black and silver going on.

Danny

Danny...Thanks for your knowedgable input, as always Looking at the Tire Rack site, there are several 19x8.5 rims that have a 40mm offset, that say they will fit my car (according to their "Upgrade Garage"). Is it a fair conclusion to say that 18x8.5 with the same offset will also fit? I know you said 18 or 19 doesn't make a difference, so I just wanted to confirm...

Also, one more question for you. Would you go for 18s with a good tire (Pirelli PZero Nero M&S) or 19s with a cheaper tire (Kumho SPT). I'm trying to decide... Other than the Pirelli, is there any other tire in that price range that you'd recommend? I like it because its uni-directional, all-season and has good all-round ratings.

Thanks,
Matt.

[HRC]

Originally Posted by Matt_330i

...Is it a fair conclusion to say that 18x8.5 with the same offset will also fit?...

...Would you go for 18s with a good tire (Pirelli PZero Nero M&S) or 19s with a cheaper tire (Kumho SPT). I'm trying to decide... Other than the Pirelli, is there any other tire in that price range that you'd recommend? I like it because its uni-directional, all-season and has good all-round ratings...

Hi Matt,

It's safe to assume that a 19x8.5, +40 will be no different offset wise to a 18x8.5. +40.

For me, your second question is hard to answer. 18" or 19" is totally a personal perference. IMHO, if the quality of the wheels are not as good as stock, 19" will hurt more than help, if your into performance that is. With 19's it's importmant to me that it is a lightweight and strong because your adding rotational mass and resistance to your car and because there is little less tire protection from pot holes with 19's compared to 18's.

For tires, I always go with the best I can afford to spend. That is going to be a major contributer to how your car rides and feels on the blacktop.

Danny

[HRC]

I think the problem here relates to width. A 8.5" rim with +40 or whatever is much different than a 9.5 with the same offset. The M3's +22 is on a 9.5 rear.

Danny