Ok confused on tire sizing.. TIRE GURU's please help a newb.
 

K I have a staggered set of 19's (19x8.5 & 19x9.5) and I used the tire calculators that were provided on here + and have looked up people who have the same sizing of wheels.

And from the search most of the people with the same wheel sizing were using 245 & 275/35/19 tires. What I don't get is when you do the conversion on width... 245 is 9.6" inches and 275 is 10.8 but when you run it on the wheel calculator it says its the best for that sizing. A wider tire is better for a narrower wheel? Do you have to give an allowance of 1/2" on both sides or something? please explain this, it honestly makes no sense to me.

Your fine and have the proper size tires ordered.

Tire tread width and wheel width work within a range. There is no one perfect set up.

ok, so if I were dabble with the sizes, is there a specific range I should stay in? And when I changes sizes, should alter tire width versus sidewall height or vice versa, such as if I went to a smaller width do raise the sidewall height to compensate, or am I just just talking out of my a$$.

Sorry, I really appreciate the help trying to understand tire sizing. I just dont want to get it wrong and get my speedometer thrown off and my VDC out of whack. :(

you want the overall circumference of the tire to be as close to stock as possible, although I've read that as much as a 3% difference in either direction is tolerated by the VDC computer.

So yes, if you go with a narrower tire/smaller wheel you would want a larger aspect ratio and vise-versa for wider tires/larger wheels.

I used this TIRE SIZE CALCULATOR when choosing which size tires to buy.

Wheel size recommendations are made by the tire manufacture.

Proper operation of VDC? Sorry but you are not a noob anymore.

Oh, I've read through some threads where some people stated they had probs with their VDC because of incorrect tire sizing, but they didn't state what size tire they were using, so I couldn't grasp an idea of what incorrect could be. :(

David, yeah that's one of the calculators i've been using.. I was just unsure if you wanted to be in the "too slow" range or the "too fast" area. :dunno:

Thanks guys, now I have an idea of what tires I should purchase :icon17:

http://i206.photobucket.com/albums/b...21809tires.gif
Difference in circumference (65.97/2054.92) is 3.2 percent. That's on the money.