Tire differences and which to buy

[fast02gt]

I have y2k cobra wheels on my mustang with nitto 555 extremes on them. They are starting to wear really bad and i'm a broke college student. I'm wanting to buy some cheaper tires this time around. What are the major differences between 265-35-18's verses 245-40-18's. The 245's are way cheaper than the 265's but is it really worth paying the difference for them. I was thinking about getting the kumho supra tires in 245-40-18. Are these tires any good. Also how do you know which tire is lower profile? thanks

 

[jadesville]

A 265mm tire is wider than a 245mm tire, the 265-35-18 tire has an aspect ratio of 35, which is the height of the tire, from the bead to the tread in relation to the width (35% high as it is wide). A 45 series tire would be 45% as high as it is wide, but it isnt as wide, so off the top of my head, I dont believe they are any taller, if much taller at all.

Kumho's are decent weather tires, it all depends on the kind of driving you do.

 

[Gearbanger 101]

The 245/40/18's are slightly taller than the 265/35/18's, but only by less than half an inch.

Here's a good comparison chart that will give you all of the variables.

http://www.1010tires.com/TireSizeCalculator.asp?action=submit

One problem you may run into with the 245's is that if your rims are 9" wide, you may find yourself scraping the curbs more often. Not a lot of protection for the rim lip with that narrow of a tire.