elvism

tires. Would changing to a 275/40/19 in the rear work with these rims? I think they are 8.5"..Would changing to this bigger tire help the car grip better from the line if i added more power?

Flagstang

I have seen people put 285s without any problems. I have the same wheel/tires

Glenn

I agree with what Adrain said. I would say yes to your traction question But it depends on which tire/make/model you go with as well as what the contact patch is. Some tires have a narrower contact patch than the actual width. Hope that made sense.

crescent_wrench

275's on a 8-1/2" wide rim is not going to perform well. It may mount, but not a good marriage.

PJRManagement

I have the same 19" x 8.5" wheels as elvism. I really like the wheels, but I would like to improve on the 245/45 19 tire size. Any safe suggestions?

LEwis26

http://lmgtfy.com/?q=Maximum+tire+wi...5inch+rim#seen

PJRManagement

I found this chart on-line, it may be helpful...
http://www.tiresandco.ca/equivalency-tables-advice.html

grabber blue gt

That chart is retarted. I have a 9.5in rim in the back and run a 285 without any problems, and it hooks like hell.

Black Fire

I agree
A 255/40 like the Brembo cars have would be best.

elvism

The only reason i picked the 275/40/19 is because this is the only size up in the same tire brand as the stock front tires. will the car feel any different?

Fast_351

Chart is messed up. They jump 10mm from line to line on the change in rim size while the rims are getting 12.7mm per jump wider. Obviously there's no way this can be consistent.

My advise is to look at the manufacturers website for their rim recommendations. Just off the top of my head, I'd say 265 is the widest you can go on an 8.5" rim without bulge, 255 is probably a better fit.

PJRManagement

Thanks for all the good info. I do like the idea of using the Brembo size, 255/40 19. I just wish someone has already done this, has pics, and can advise how it looks and drives.

laserred38

The V6 Performance Package wheels are the same size as your wheels (19x8.5), but use the same tires as the Brembo Package wheels (19x9). You'll be fine.

PJRManagement

Thanks, laserred38, you are correct, I see the V6 Perf Pckg uses 255/40 19. But are you certain that wheel is 19x8.5?

laserred38

Yep it's the same wheel as the GT/CS, but no GT logo and black windows instead of Sterling Gray...

PJRManagement

Great, thanks! Then I'll go with 255/40 19, with a summer performance tire. I find it really strange that Ford would equip GTs (like mine) with a smaller all-season tire, annoying.

laserred38

Yeah it's definitely not enough tire for 400+ hp. I'd recommend the Hankook V12, General Exclaim UHP or Continental DW/DWS. I've used the Generals and many guys on here have used the other two, with great results for a daily driver.

Tony Alonso

Lesser width all-season tires are a little better in the snow They also cost less to replace.

laserred38

I'm sure the narrower all seasons also offer lower rolling resistance which helps Ford in the mpg ratings...

PJRManagement

Thanks! I live in Las Vegas, so snow/rain is no issue. I've had the Hankook Evo V12 on my Infiniti G35 and Audi A4, and they are great in the dry, and acceptable in the wet, so I will put them on my new GT in the better 255/40 size - as soon as I burn up these OEM all-seasons.