a 275-60-15, it's very tall, to tall for the one's in the front, you said you have 255, just stay with that in the back, or you can go with the same 235 in the back, or stay with the 255 in back.
in the back you won't have problems with touching anything, i run 295-50-15 on all coners and no problems so far, except when i lock the wheel in the turn, rubs a little on the front sway bar, but i have a f- body, but i can live with that

 

235/60-15's are just fine in the front. They are a bit SHORTER than stock 225/70 or 235/70, and minimally wider. As for the rear, the 275/50-15 would be the closest diameter you could run with a wider tire. However, if you are using the stock 7" rim, I would not run anything wider than 255/60-15.

 

Hey guys thanks for the info I think i'll go with a 255/60/15 in the back. I guess ill just have to rotate them side to side, With a possi I guess they'll wear even lol.

 

bc-94 what size rims are using? and like raxstone mentioned, 275-50-15 would be the closest but you would have to used a 15x8 rim for that size, if you can find 2 15x8, you can used that tire, and it would look nice and wide in the back.

 

Originally posted by BC_94_CAPRICE:
Hey guys thanks for the info I think i'll go with a 255/60/15 in the back. I guess ill just have to rotate them side to side, With a possi I guess they'll wear even lol.

I've heard that rotating rears from side to side isn't a good thing. Something about the rubber getting used to going one way with the torque, and reversing it after a while will cause them to wear quicker. As long as they are wearing evenly, then I'd not rotate the rear tires.

 

i don't rotate tires at all, the reason it's that if you make them roll one way and then switch to roll the other side, the ruber wear out faster and tend to make the tire to separate, not always but the risk is high, if you have a part on the front end bad and mess up 2 tires why put teh ones in th eback up front to mess then up too, i prefer to buy 2 than 4.

 

I've heard that rotating rears from side to side isn't a good thing. Something about the rubber getting used to going one way with the torque, and reversing it after a while will cause them to wear quicker. As long as they are wearing evenly, then I'd not rotate the rear tires.

i don't rotate tires at all, the reason it's that if you make them roll one way and then switch to roll the other side, the ruber wear out faster and tend to make the tire to separate, not always but the risk is high, if you have a part on the front end bad and mess up 2 tires why put teh ones in th eback up front to mess then up too, i prefer to buy 2 than 4.

Hey guys that actualy makes perfect sense regarding rotating the tires. As for putting a 50 series on the back and a 60 series on the front wouldn't that make the car sit lower at the back and not even? the rims im pretty sure are just 15 X 7 the 255/60/15's buldge out as it is.

 

If the tires will be shorter depends on the width and aspect ratio. In your case, 235/60-15"s are 235mm wide, with an aspect ratio of 60%. The aspect ratio is the sidewall height of the tire. Keep in mind, 25.4mm per inch, so a 235mm tire is 9.25" wide. This is not the tread width though, tread width will vary from one manufacturer to another, but should be less than the overall tire width (in the case of 15" tires, typically about an inch less). This 235mm width is what the tire will be if mounted on the ideal rim width. Mount on a non-ideal rim, and the tire will conform to that, to a point -- which is why they have a 'recommended' range of rim widths for different tire sizes.

Now, with 235/60-15's on the front, you have a tire that is about 5.5" of sidewall (235mm*60%). With a 15" rim, that would be 15+5.5+5.5= 26" tall tires. So, with a 50 series in the back, if we used 275/50-15's we would have a tire height of 25.8" (with a 5.4" sidewall). So these would be very close to the same height. If you had the stock sized 235/70-15's, then the tire height would be 28", and it might look a bit funny to you having 1" more sidewall and thus 2 " taller tires in front.

Further, the 275mm tires are 10.8" wide overall, with about a 9" treadwidth. Thus the recommendation to run an 8" rim with them (8"-10" would be the common recommendation from manufacturers).

 

I run 255/70/15s on all 4 corners and they really fill the wheel wells nice and I don't rub turning or at anytime. BFGs site says the 70 series are 29.1" tall and the 60 series are 27.1" tall. Oh I also have the rear end moved back 3/4" to center the wheels and that helps.