Wider front wheel footprint...
 

Currently the width of my front wheels are 245's...would there be any discernible difference in handling or mileage by going to a 255 in the front?

I *think* it might reduce gas mileage, but I am also thinking that a bigger footprint will help with handling. However, 10 millimeters might not be enough to make much of a didfference.

I will be moving to 10" wide wheels all around, and am planning on putting either 275's or 285's on back.

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Hi there, I hear what you're saying rscultho.

I can't comment on your car particularly but made a similar change to my A6.
I had 225 x 50 x 17's on her and changed to 255 x 35 x 19's so a much wider footprint and a bigger change than you're considering.

I've noticed she certainly seems more "planted" on the road and obviously traction is improved. I do notice a slight drop in mpg but thats to be expected and part of the price you pay I guess.

The 20" fronts are 255.

My Sentas are 255/35/20 on the front and 285/30/20 rear.

Excellent - so you are running a 285mm width tire on a 9.5" width wheel...I should have no problem with a 285 on a 10" wheel.

Love the wide tire stance on the rear!!

Hi, I have just changed my senta wheels for a set of XKRS vortex wheels. Still both 20" but back tyres are 295/30/20 and look fantastic fronts are still 255/35/20. Pictures to follow. Im just about to advertise my senta wheels and tyres on ebay UK, dont know how much they will make.

http://photos.ecarlist.com/t2/hB/vF/.../bj/qg_800.jpg
My 2009 XKR Portfolio Cvt came with 20" Selena wheels and 255/35-20 front tires and 285/30-20 rear tires. I'm amazed that the ride quality is so nice, considering the lack of sidewalls. Beware of curbs, potholes, and other road hazards that can damage the wheels - there is little, if any, sidewall protection from the ultra-low profile tires. Cost to refinish ranges from $50 to $150 or more, depending on extent of damage.