[300]

New guy here.

Question: When changing to a larger circumference tire, will acceleration and/or top speed change?

Why would people change to larger tires if its going to slow them down?

Thanks for any explanations or opinions on the matter.

[LILCBRA]

As far as being quicker or slower off the line, a smaller diameter tire will be quicker. I would assume, but have never tested myself, that the larger diameter tire will increase your top speed. One reason to change to a larger diameter tire, and probably a good argument right now, is for fuel mileage. The larger diameter the tire, the less revolutions per mile it will make. I guess it will depend on how much larger you go over stock as to what kind of gains you will see. Hope this helps you out!!

[300]

Thanks.

A popular tire chain told me different. My instructor (im a p/t auto tech student)

agrees with you. I just wanted a second opinion and more if anyone has one.

[parrish5o]

Using a taller tire is like installing higher gears and vice versa. A taller tire=less take off and more top end, shorter tire=quicker take off and less top end, more rpm.

[300]

I know I'm wrong and I accept that, but my thinking goes like this:

3 : 1 first gear and 3 : 1 gears. Overall ratio is 9 : 1. A taller tire would cover

more distance per revolution.

Like I said I'm wrong, I just don't understand why.