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[eforty6_m3]

Last summer, I picked up a set of CCW D15's that came with some "way too stretched for my taste" tires. Here's a side shot the day I mounted them, and a few others from the day I had picked them up:







Not wanting to spend more money at the time on new tires, I drove with them, as is, for a few months and just recently swapped over to my winter setup (MAsshole, here).

Now that the CCW's are off my car, I'd like to ditch the current tires and go with some proper fitting rubber. Here's where you all come into play.

CCW specs:
front - 18x9.5 et20 (current tire 215/35)
rear - 18x10 et25 (current tire 215/40)

I have a Pre-LCi 335i, lowered on BC coilovers. I have a beater truck that I drive often, but would still consider my E90 a "daily driver". I've done a ton of searching/research on this very topic, but have yet to find any concrete information.

Keep in mind that I'm willing to roll my fenders (and probably will have to, with the aggressive front fitment), and during the summer months, I'm not at the lowest ride height. I probably have another 1-1.5 inches to go down on my coilovers.

Lastly, I can adjust front camber with the BC coilovers, which should help.

But to avoid as much rubbing as possible, what tire sizes should I look at switching to? With my 162's, I was running 225/40/18 front and 255/35/18 rear and had no issues. But with the more aggressive offsets and widths of the CCWs, I know that won't work.

So let's hear it. What are the optimal tire sizes I should look for? Thanks in advance!

[elh0102]

Your wheels may be too wide for your application. With tire sizes appropriate for those wheel widths, I am afraid you will be very challenged to avoid clearance problems.

[fmoua916]

I say 225/40 fronts and 255/35 rears

[eforty6_m3]

Originally Posted by elh0102

Your wheels may be too wide for your application. With tire sizes appropriate for those wheel widths, I am afraid you will be very challenged to avoid clearance problems.

Thanks for the input, but I think it's doable. Just waiting for some more folks to chime in, perhaps some vendors who specialize in wheels/tires and fitment.

[eforty6_m3]

Anyone else care to chime in? I'm in no rush since I don't need tires until spring, but the sooner I can wrap this all up and have one less thing to worry about, the better.

[Gary@TireRack]

Originally Posted by elh0102

Your wheels may be too wide for your application. With tire sizes appropriate for those wheel widths, I am afraid you will be very challenged to avoid clearance problems.

+1

[eforty6_m3]

Originally Posted by Gary@TireRack

+1

Ok, while I appreciate the +1, could you provide me some detail on what tire specs would be recommended for my wheel sizes?

[Gary@TireRack]

I'm stating +1 to the comment that you will be very challenged to find to find tires to make this work. The wheel sizing and offset is way too far off for a setup that doesn't look "way too stretched" for your taste.

If you want a more normal, non-stretched setup then sell these wheels and look at something more in the range of 18X8-18X9 ET35 front and 18X9-18X9.5 ET35 rear.

[eforty6_m3]

Originally Posted by Gary@TireRack

I'm stating +1 to the comment that you will be very challenged to find to find tires to make this work. The wheel sizing and offset is way too far off for a setup that doesn't look "way too stretched" for your taste.

If you want a more normal, non-stretched setup then sell these wheels and look at something more in the range of 18X8-18X9 ET35 front and 18X9-18X9.5 ET35 rear.

I know exactly what you meant, which is why I was simply asking for some actual specifications. I know you weren't "bumping" my original post or anything like that.

Regardless, I appreciate the input.

Anyone else running a similarly aggressive setup want to elaborate?

[Riceball777]

It's going to be hard to fit correct non stretch tires on those rims since the offset is incorrect for this application. For the front 9.5 rim the narrowest safe approved tire would be a 235/40/18 and for the rear 10 inch rain the narrowest safe tire would be a 255/35/18 but Ideally you would want to run a 265/35/18 to match the 25.3 inch rolling diameter of the front 235/40/18. It might be possible if you cut and flare the fenders.

But I still conclude that these are stance offset rims for this car and simply are incorrect fitting rims.

[ApexWheels]

Originally Posted by elh0102

Your wheels may be too wide for your application. With tire sizes appropriate for those wheel widths, I am afraid you will be very challenged to avoid clearance problems.

This is correct. Optimal tire sizes (in terms of performance and wheel protection) would be 255 / 275, but like others have mentioned, this is not a "bolt-on and go" setup.

The rears will require a really good roll, as well as some negative camber. If your offsets were closer to et33, you wouldn't have such a hard time fitting 275's.

The front is where you are going to experience the most trouble. Stretching a 245 (still much better then the 215's on there now) will be your best bet, as 255's are just not going to work. You will need to dial in quite a bit of negative camber, so camber plates are a requirement. Even with negative camber, 245's may be difficult with an et20 offset.

- Ryan

[msjt]

"rear - 18x10 et25 (current tire 215/40)"
Wtf, i'm surprised that tire didn't burst!

[eforty6_m3]

Originally Posted by Riceball777

It's going to be hard to fit correct non stretch tires on those rims since the offset is incorrect for this application. For the front 9.5 rim the narrowest safe approved tire would be a 235/40/18 and for the rear 10 inch rain the narrowest safe tire would be a 255/35/18 but Ideally you would want to run a 265/35/18 to match the 25.3 inch rolling diameter of the front 235/40/18. It might be possible if you cut and flare the fenders.

But I still conclude that these are stance offset rims for this car and simply are incorrect fitting rims.

I appreciate your input. Some good info here and I respect your opinion.

Originally Posted by ApexRaceParts

This is correct. Optimal tire sizes (in terms of performance and wheel protection) would be 255 / 275, but like others have mentioned, this is not a "bolt-on and go" setup.

The rears will require a really good roll, as well as some negative camber. If your offsets were closer to et33, you wouldn't have such a hard time fitting 275's.

The front is where you are going to experience the most trouble. Stretching a 245 (still much better then the 215's on there now) will be your best bet, as 255's are just not going to work. You will need to dial in quite a bit of negative camber, so camber plates are a requirement. Even with negative camber, 245's may be difficult with an et20 offset.

- Ryan

This is a big help, thank you. Wish all vendors were this helpful, instead of just essentially saying NOPE, WON'T WORK.

I need to do a bit more homework and figure out what my best option(s) is/are. Thanks for the food for thought.

Originally Posted by msjt

"rear - 18x10 et25 (current tire 215/40)"
Wtf, i'm surprised that tire didn't burst!

In the world of "stretching", which I am no means an expert on, I think there are way more drastic stretches than a 215/40 on a 10inch wheel. Quick google image search will confirm that. But yeah, I get your point.
Which is why I'm trying to eliminate them.

[UPWheels]

Here's an example of 18x9.5 et22 front with 225/40/18 and -1degree camber we found on another thread.





http://www.e90post.com/forums/showthread.php?t=1031965

Here's 19x10 ET20 rears on LCI e90 running 255/35 with rear fenders rolled




http://www.e90post.com/forums/showth...highlight=et20

"Possibilities are endless" You should be able to get meatier tires and avoid rubbing if you really want to.


225/35 or 40 F and 245 or 255/35 R
or
235/35 F and 245 or 255/35 R

With this application, we're sure owners are fully aware that rubbing may occur and they will have to roll fenders, lower, camber, etc. Not saying the above will automatically be rub-free, but it will be a sweet challenge to prove others that it's possible.

Sales @ UPWheels.com * Ph. 657.888.4UPW * FacebookDOTcom/UPWheels