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The Tire Rack's Tire & Wheel Forum
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Old 04-04-2011, 09:36 AM   #1
johnnySV
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245/35-18 FRONT on et40 -- Xi, Eibach Lowered -- rub?

i would like to run a 245/35-18 SQUARE setup, 18x8.5 et40 wheels, on my Xi w/ Eibach lowered suspension.

question is: will the 245 w/ et40 rub in the front?

i've seen it done on a coupe but havent been able to contact the owner via PM (member: Dogtorj) for verification on not-rubbing. Just looking for second opinions and/or if the Xi (wagon in this case) is any different?

thanks!
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Old 04-04-2011, 03:54 PM   #2
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I'd recommend going with a 235/40/18 if you want to avoid rubbing at stock height, but since you are slightly lowered modification may be required, especially with a 245/35/18. Although if you're riding on springs it may not require fender rolling, it just depends on the tire brand, how low your car really is, and how your alignment specs are.
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Old 04-04-2011, 05:00 PM   #3
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Kevin thanks for the response.
if im interpreting your advice correctly it suggests that a 245 et40 Front may rub on the fender?
... i thought that the risk of rub (in the front) would be on the strut side ??

could you help clarify?

also, any reason to think that clearance would be different between Sedan / Wagon / Coupe ??


Thanks,
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Old 04-04-2011, 05:55 PM   #4
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Well, in either case you don't want it to rub whether it will be on the struts or on the fenders haha. Since those tires are larger than what we recommend for the front, either is a possibility. With that offset I would say it would be very close to touching the struts in the front. I would just stick to a 235/40/18 to be safe.

For the fronts though I don't have any special notes here that would indicate that there is any less clearance between coupe, sedan, and wagon. The rears on the sedan and wagon are a little more cramped than the coupe though.
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Old 04-04-2011, 08:33 PM   #5
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i should add my reasoning behind all of this:
(note the tire i want is the Hankook V12, specs will vary between tire choice...)


a 245 will be closer to the OEM Outer Diameter than a 235:
245/35-18 = 24.8"
235/40-18 = 25.4"
OEM (225/45-17) = 25.0"
... hence, the 245 will be quicker accelerating & closer speedO accuracy. AND, the shorter sidewall will look better IMHO.


also, a 245 is lighter than the 235, in this case:
245/35-18 = 22lbs
235/40-18 = 24lbs
OEM (225/45-17) = 24lbs
.... resulting in better MPG, & overall response.


i deem these two factors highly significant and think they are often over-looked by both Fanatics & Vendors in the pursuit of just plain ol' hawtt rimzzZz!
i plan to couple w/ VMR CSL Reps (VB3) which are one of the lightest / most-classy / best-valued wheel options that i've found; and im dead set on a Square setup for my Xi w/ the practicality of tire rotation.

more notes & votes from anyone who has fit 245 et40 to the front ??
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Old 04-05-2011, 01:08 PM   #6
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I see. I still think a 245 may rub, depending on your setup. It's not that the tire is too tall really, it's just that it may be a bit too wide. Also, as long as you are within 3% of your factory specs you should not have any issues, but I can see why you would want a tire that brings the outer diameter as close to OEM and the weight down.
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Old 04-09-2011, 12:00 PM   #7
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I'm not sure if it would rub or not on the inside, but it'll be close. Run a more aggressive offset

EDIT: 245/35 ET35
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Old 04-10-2011, 09:34 PM   #8
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Quote:
Originally Posted by johnnySV View Post
i should add my reasoning behind all of this:
(note the tire i want is the Hankook V12, specs will vary between tire choice...)


a 245 will be closer to the OEM Outer Diameter than a 235:
245/35-18 = 24.8"
235/40-18 = 25.4"
OEM (225/45-17) = 25.0"
... hence, the 245 will be quicker accelerating & closer speedO accuracy. AND, the shorter sidewall will look better IMHO.


also, a 245 is lighter than the 235, in this case:
245/35-18 = 22lbs
235/40-18 = 24lbs
OEM (225/45-17) = 24lbs
.... resulting in better MPG, & overall response.


i deem these two factors highly significant and think they are often over-looked by both Fanatics & Vendors in the pursuit of just plain ol' hawtt rimzzZz!
i plan to couple w/ VMR CSL Reps (VB3) which are one of the lightest / most-classy / best-valued wheel options that i've found; and im dead set on a Square setup for my Xi w/ the practicality of tire rotation.

more notes & votes from anyone who has fit 245 et40 to the front ??
I too have been considering a set of VB3's for my '04 330ci and I really can't justify doing a staggered setup. Seems like most people do go with a staggered stance, and although it certainly looks nice, I'm really diggin the squared stance (though I too can't find many pics of it). Not only because it offers better handling characteristics, but its cheaper and offers the practicality of being able to rotate the tires.

Anyway, I loved your above post and we are totally on the same page, but I thought I would throw my two cents @ the discussion...

The consensus from the experts seems to be the 245 is a little too wide to be safe from rubbing on the front w/o some fender work. I also think a 245 tire is a lot of tire for a street driven car to handle up front, though you have me completely torn now with your spot on assessment of OEM tire diameter and weight difference in the 235/40 vs the 245/35. Everything you mentioned above is 100% truth, and definitely overlooked by 95% of the population.

For me, I think I have decided I am going to do the VB3's 18x8.5" squared on 235/40 Conti DW's. I would really like to have the best of both worlds with extra weight savings on the wheels and such, but in the end I think those differences in wheel weight, acceleration, speed0 accuracy, MPG, and overall response will be rather minute. Perhaps even indistinguishable I'll bet.

Thoughts?
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Old 04-10-2011, 09:41 PM   #9
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Im literally in the same predicament. I have an 04 330xi and want to run squared 18x8.5 VB3s with Conti DWs. I was thinking of 225/40, any thoughts, warnings or opinions?
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Old 04-10-2011, 09:50 PM   #10
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Im literally in the same predicament. I have an 04 330xi and want to run squared 18x8.5 VB3s with Conti DWs. I was thinking of 225/40, any thoughts, warnings or opinions?
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Old 04-10-2011, 10:03 PM   #11
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Originally Posted by KeegMac5621 View Post
Im literally in the same predicament. I have an 04 330xi and want to run squared 18x8.5 VB3s with Conti DWs. I was thinking of 225/40, any thoughts, warnings or opinions?
Why not a little more rubber with a 235/40? That is what I am considering anyway... Unless someone can talk me out of it, lol.

Among other things, what lead me to that decision is stock setup on my 330ci is 245/40 rears with 225/45 fronts... I don't wnat to run a staggered setup anymore, so a good compromise, imo is 235 all around. I don't think the rears will miss the 10mm of rubber... its not like I'm putting down 300-350+ hp anyway, lol

Last edited by Adam684; 04-10-2011 at 10:05 PM.
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Old 04-10-2011, 10:58 PM   #12
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Ok thanks. I will probably go with the 235 because im in the tri-state area which has some of the worst roads in the country especially after this winter. Not going to risk new rims to save a little $$ on rubber.
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Old 04-11-2011, 09:16 AM   #13
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i personally dont like the stretched look of a 225 on an 8.5" wide rim.
(i considered this too b/c its close to OEM rolling diameter, and also lighter)
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Old 04-11-2011, 09:47 AM   #14
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dont know how different the Xi stryts are. but ive ran 18X8.5 ET38 2/ 245.40.18 and not rub at all. even in the most extreme driveway angles and what not.
id bet 235.35 wont be an issue.
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Old 04-12-2011, 09:12 AM   #15
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Perfect.
This brings up a good point: Could somebody post a detailled pic showing the amount of Stretch / Exacting Fitment of a 225 on a 8.5" wheel?
also would be nice to have for 235 and 245 on same width rim.

also please specify Tire Make / Model / Size (ex: 245/35) when posting.

seeking a robust factual / empirical baseline here.....

Thanks,
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Old 04-12-2011, 09:15 AM   #16
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^ cant get that, as different tire manufacturers fit differently even tho the #s on the side say the same thing.
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Old 04-12-2011, 12:29 PM   #17
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Quote:
Originally Posted by johnnySV View Post
This brings up a good point: Could somebody post a detailled pic showing the amount of Stretch / Exacting Fitment of a 225 on a 8.5" wheel?
also would be nice to have for 235 and 245 on same width rim.

also please specify Tire Make / Model / Size (ex: 245/35) when posting.

seeking a robust factual / empirical baseline here.....

Thanks,
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Old 04-12-2011, 12:36 PM   #18
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two huge thumbs-up Kevin!

the 225 on 8.5" doesnt look as stretched as I had thought in these great pics. The BFG has a notcieably wider section than the Dunlop (looks narrow-est?) or the Pirelli (looks to be in the middle). Time to now compare to the TireRack.com "specs" page to see how these section width's compare to the tires I have in-mind (Hankook V12). 225 may be a viable Square option for me !
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Old 04-12-2011, 12:39 PM   #19
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No problem! I would definitely say that up close, the Dunlop appeared the most, "stretched," but in reality it's not stretched at all. It's still within manufacturer specified widths for the wheels. The BFGoodrich tire was definitely the most beefy of the bunch though.

Hankooks should run pretty true to size, so probably close to the Pirellis, and they have a fairly square shoulder as well.
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Old 04-12-2011, 01:00 PM   #20
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if you show a 225 michelin pilot powers on a 8.5 it looks stretched.
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