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E90/E91/E92/E93 (2006 - 2013)
The E9X is the 4th evolution of the BMW 3 series including a highly tuned twin turbo 335i variant pushing out 300hp and 300 ft. lbs. of torque. BMW continues to show that it sets the bar for true driving performance! -- View the E9X Wiki

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  #1  
Old 02-22-2014, 11:18 AM
Shouter Shouter is offline
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255/40/17 or 245/45/17 for my E90 possible?

Hi guys,

I see that a lot of of stock E90s come with broader tires on the rear up to 255 or even more. however, front tires are always 225!! is there any restrictions for broader tires on front?

My 330i stock tire size is 225/45/17, and 8JJ rim both front and rear. I have a couple of combinations in mind:
1- 245/45/17
2- 255/40/17

what do you think guys? is there restrictions or information from people who tried the same?
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  #2  
Old 02-23-2014, 01:26 PM
Shouter Shouter is offline
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Guys.. How difficult is my question?!!***9786;***65039;
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  #3  
Old 02-23-2014, 01:41 PM
wilt wilt is offline
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Visit Tire Rack web site and see if THEY think it fits!
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  #4  
Old 02-23-2014, 06:09 PM
Shouter Shouter is offline
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I did, but they have only the OEM sizes.
The options I'm asking about are custom sizes.
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  #5  
Old 02-23-2014, 06:24 PM
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Zooks527 Zooks527 is offline
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Quote:
Originally Posted by Shouter View Post
I did, but they have only the OEM sizes.
The options I'm asking about are custom sizes.
Phone Tire Rack tomorrow. I've had some good discussions with their sales reps. They have a good grasp of what does / does not work.
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Old 02-23-2014, 06:37 PM
BashedBarrique BashedBarrique is offline
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Measure the distance between the widest point of the top of the tire and the front strut on the inboard side, and also the distance between the widest point of the outboard side of the tire and the fender, while rotating the steering wheel.

Then, using the sum of these measurements, calculate the widest tire cross section that will fit. Keeping in mind that you may have to change the "offset" of the wheel if the two measurements are different. Of course that offset cannot be less than the OEM offset since this would cause the wheel to interfere with the brake caliper.

Last edited by BashedBarrique; 02-23-2014 at 06:38 PM.
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  #7  
Old 02-24-2014, 08:12 AM
Princeton Princeton is offline
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Tire Rack told me that they did not recommend 245/45-17
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Old 02-24-2014, 08:21 AM
Shouter Shouter is offline
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Thanks my friend. What about 255/40/17?
Really appreciate your help.
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  #9  
Old 02-24-2014, 02:12 PM
Princeton Princeton is offline
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Didn't ask that. Suggest you give them a call. They are very knowledgeable.
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Old 02-24-2014, 02:38 PM
fdriller9 fdriller9 is offline
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Of course you can mount them, but why do you want a wider tire?

What benefit do you expect to gain with a wider tire?

It's unnecessary.
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Old 02-26-2014, 05:52 AM
Shouter Shouter is offline
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My target is a little bit of ground clearance. In this case about 3mm
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  #12  
Old 02-26-2014, 07:33 AM
fdriller9 fdriller9 is offline
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Ok well I wouldn't go up in tire sizes to get ground clearance. All you're doing is adding unsprung weight which may decrease your gas mileage.

If you're looking to add clearance in the front, you have the option to add a reinforcement plate. This should give you the clearance you're looking for in the front.

There isn't anything you can do about the rear besides maybe adding a helper spring. But I wouldn't do that....

http://store.bimmerworld.com/e36e46e...tes-p1219.aspx

http://www.turnermotorsport.com/p-27...ates-pair.aspx

Dinan also makes a plate. But we all know that you for the name with Dinan....
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  #13  
Old 02-26-2014, 08:12 AM
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I have 245X35X19 - 275X30X19" with no issues. A lot will depend on what width & back spacing the wheels have. My wheels are stock 19" 313's. You might not be getting a response because I would expect few people are going to 45/40 in larger tires

BTW: No response is better than one with a just guess or bad info.
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Last edited by bear-avhistory; 02-26-2014 at 08:19 AM.
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