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[cannonball]

The 135i as everybody knows has a tendency to understeer.
This could be solved using the same size wheels and tires on all 4 corners, for a more neutral feeling.
Has anybody tried using 18" x 8 1/2" wheels and 245/35-18 tires all around?
Will they rub on the front?

[Eddy@ApexWheels]

Originally Posted by cannonball

The 135i as everybody knows has a tendency to understeer.
This could be solved using the same size wheels and tires on all 4 corners, for a more neutral feeling.
Has anybody tried using 18" x 8 1/2" wheels and 245/35-18 tires all around?
Will they rub on the front?

Yes it's been done. It requires camber plates up front to fit.

To note: Even if camber plates were not required for a square setup to work, or if the car came with a square setup from the factory. The car would still heavily understeer due to the lack of front negative camber. These cars desperately need that modification.

[VMRWheels]

What offsets were you planning to run?

-Charles@VMRWheels

[cannonball]

Charles,
I was planning on buying 2 additional 261M rear wheels 18" x 8 1/2" and Bridgestone RF tires 245/35-18 , and installing them up front.
Will they fit without the camber plates?
Will camber plates if fitted, make the the inside of the front tires wore much faster?

[WhiteOne]

You will need 10mm spacers for the front to work.

[sootyvrs]

Yes you will need a spacer

The OEM 18x8.5 ET52 will catch the front strut.

Mine is 8.5" ET43 and there's only around 3mm clearance to the damper.

[VMRWheels]

Like the guys above have said, be careful with strut clearance first of all. Since you are running a 8.5" wheel and a 245 tire, you might also watch to watch out for outside clearance since rubbing issues may occur without a fender roll since 245's a bit wide.

-Charles@VMRWheels