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[oztiks]

Help needed by people who know wheels/tires.

I spent quite a few hours reading the forums and looking at sites for tires that would look great and fit great with no issues. Since I am in Canada the TMPS is no issue. I now have the 261M style wheels with the oem RFT's 18".

After many weeks of debating back and forth, I finally decided to go with ASA
ARA1 wheels 18x8 front 40 mm 18x9 45mm rear (can be seen on tirerack) and was going with Hankook Ventus V12 tires 225/40/18 front and 255/35/18 rear. Was told by many that it would not be an issue (rubbing etc)..I mean many people ;( including people that run large tire shops and BMW themselves told me it should not be an issue..so I decided to call my friend who has a tiny lil" garage who usually works with what looks like vintage (to be nice) cars.. chevrolet mailbu etc... I asked him if he would be able to swap wheels for me once they arrived. As soon as I told him the specs.. he pauses looks at me strangely and says to me ...you will have to roll your fenders...... offset issue.

So for the love of ..... I want to change my wheels and throw on some nicer tires without having to make any modifications to the body and or have rubbing issues, I prefer staggered with lip look. I have 0 understanding when it comes to wheels/tires so how can I make this combination work or where can I find a similiar combination that will not give me any problems at all. I just want a nicer and smoother ride. I still don't know what he meant by it will not work because of offset ..what exact numbers am I looking for it to work..Sorry for the rambling. Any help would be greatly appreciated.


Thank you in advance.

[1013mm]

what are the offsets?? its all about the offset

[oztiks]

Offsets added. Sorry bout that.

[larryn]

Personally, I think you'll be very close to not rubbing with that setup (in the rear). The fronts should be fine. If you are not lowered, even less chance of rubbing, since the rear wheels increase camber during compression, allowing it to be even further under away from the fender.

[oztiks]

Hey larryn..

What you are saying is exactly the way most tire shops replied (may not) (possibly) (perhaps) (maybe)...etc Not to encouraging.
No, I don't plan on lowering the car, too much of a pain for a vert. You should see my mother in law in the back seat...low profile to the max.

Thanks

[larryn]

From personal experience, I had ET41 9" wide wheels with 255/40 tires and they barely rubbed on a lowered car. I put a different brand of 245/40's on, and they did the same thing. These were with Yoko Advan Neovas, and Dunlop Star Specs, which both are oversized compared to others of the same markings.

Hankooks are not known for running wide (actually they're known for being on the smaller side). Add to that, you are using a wheel that's 4mm more inboard than what I ran, and you are not lowered... Also, your tires are nearly an inch narrower at the tread, according to tirerack's specs. I think you'll be okay.

No guarantee, but I'd wager you would not rub. (certainly everything is in your favor compared to my experience, and comparison)

[Eyeman]

I definitely think you should go with 245/35 rear tires if you are concerned about rubbing. Even that might rub when your mother in law is in your car.

[oztiks]

My Oem's are 245/35/18 on the rear. Was hoping to go a lil' wider. What I am not understanding here is , what exactly would be the issue with what I was about to purchase? Is it the tires? wheels? combination? After I was told about the issue by my friend, I called tirerack and I forgot who I spoke to (not Gill) but he did say it would need fender rolling after I mentioned to him what I was told...

[1013mm]

245 to 255 is not much anyway. I didnt see the difference. 245 to 255, its still not wide enough for a big difference.

[larryn]

Those new wheels are ET45 9", as you posted. The stock 135i wheels are ET52 8.5"

Since 1" = 25.4mm, let's compare...

Since the new wheels are .5" wider, you're pushing the wheel out towards the fender by 6.35mm (1/4 of the 25.4mm, because you are only dealing with 1/2" difference in wheel width, plus you take half of that because offsets are calculated from the center of the wheel)

PLUS, since the offset is less on the new wheels, you're pushing it out towards the fender by another 7mm.

So, if you have 13.35mm from the tire to the fender with the stock 245 on the stock 18x8.5" wheel, you could fit those wheels with 245's. If you have more than 13.35mm of space, you have room for a wider tire than the stock 245.

FYI, 13.35mm is almost perfectly equal to 1/2", which I'd be surprised if you did not have a little bit more room that that.

[oztiks]

Would love to know for certain . Perhaps Gill can chime in on this?

[larryn]

"For certain" = somebody's done that EXACT tire and wheel combo on a 1 series, which I'll highly doubt you'll find, unfortunately.

Read my detailed post above.

[oztiks]

Wouldn't someone who sells wheels and tires know for certain? I would hope so..

Wow!! I read your post just now. My initial thought was >>But I just want to look pretty<<



This is where I will say o.k I believe you without understanding the theory ;(

The big issue here is that I was told by 3 people after I made the order that I would have issues ( that is when I cancelled the order and put it on hold) until I was certain. The people who did say it would rub was 1. a performance shop (jrponline in Canada) 2. A person from Tirerack 3. An owner of a repair shop. That is when I get confused. Especially after you give what looks like detailed facts as to why it shouldn't be a problem. Still don't have that for certain Guarantee feeling.

[larryn]

You might hope so, but if you really think he can tell you anything more than "it might" or "maybe", you're kidding yourself, especially when it's that close. Tirerack does not want to have to take a return because they guessed wrong.

...or spend 5 seconds of your own time to take the info I already gave you and measure your own rear tire to the fender. Help yourself.

[oztiks]

larryn read my post above yours You making me feel pretty


"Tirerack does not want to have to take a return because they guessed wrong. "

I think (I did say think) you may be wrong here. If success is measured by guessing or not knowing " for certain" what product they are selling to a customer without any doubts to satisfy a clients needs, than I doubt they would be as successful as they are.



That will take more than 5 seconds to think about.

[arrutled]

why dont you try d-force empowers? Ive seen that successfully on our cars. look for member arok or rbernard.

[1013mm]

you never know "for sure" until you or someone tries.

[dread1]

Originally Posted by oztiks

Wouldn't someone who sells wheels and tires know for certain? I would hope so..

Wow!! I read your post just now. My initial thought was >>But I just want to look pretty<<



This is where I will say o.k I believe you without understanding the theory ;(

The big issue here is that I was told by 3 people after I made the order that I would have issues ( that is when I cancelled the order and put it on hold) until I was certain. The people who did say it would rub was 1. a performance shop (jrponline in Canada) 2. A person from Tirerack 3. An owner of a repair shop. That is when I get confused. Especially after you give what looks like detailed facts as to why it shouldn't be a problem. Still don't have that for certain Guarantee feeling.

Jrp is a parts dealer they are not qualified to give advice. i live literaly 2 min away from them.

Also let me get this straight you asked about 4 shops hat said it woudl fit and then one shop said they wouldn't... why bother asking so many shops and then relying on the one shops opinion only. its like no buying colgate be cause 1 doctor out of 10 does not agree.

Although tire rack is great, they have told me on other cars that some tires were too wide and I would rub. I disobeyed theirs suggestion and got the tire I wanted. It worked out perfectly, I woould not always suggest this but I took some measurments off friends.

[oztiks]

Spoke to Gill and he apparently had the exact set up without any issues..so I ordered them and will post pics when removed from storage (garage queen) 2500 km on the car

Thanks larryn for teaching me quite a bit about offsets and the math.

[larryn]

Fantastic! I guess I was wrong about somebody having that exact setup. When you get them, add may want to add your setup to the "What's Been Done" thread in the Tires sub-forum, for the next person.

[acivick]

As others have said, you're not going to have 100% certainty unless someone has tried your wheel/tire combination before. With that said, people here have done 225/255 on OE wheels, so pick some that have the same sizing specs and you will very likely have no problems whatsoever. This is particularly true if you shop by vehicle at tire rack, since they are supposed to be verifying fitment either directly or by analyzing CAD drawings. However, they will almost always recommend the OE tire size because there are too many variables to promise perfect fitment in most cases when increasing tire width.

[oztiks]

To larryn..

Yes, I will do that once I can take pictures...seems no else on this forum.. atleast not that I've seen has a Monaco blue vert with grey top and grey interior...