Jump to content

Recommended Posts


Those Hankooks look nice and thyanx for the chart 240ZMan.

You guys know those tire size caculator sites that says "(X) amount of

tire diameter above 3% original size risks brake failure"?

Is there any truth to that?

I'v been using this site here which seems to be pretty good I guess.

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

Hmmm, I haven't seen the 3% warning before. I can imagine a few reasons to be concerned, but none seem likely enough to put a big warning up.
From my days selling tires, I recall that there were several issues around the 3% figure. Most had to do with varying local regulations, and load capacity safety buffers.

But the brake warning (as I recall) had to do with modern cars with anti-lock brakes. Which is most anything these days. I seem to recall that some ABS controllers get fatally confused if the diameters of the tires are not all similar. After all, ABS works by comparing the relative rotation speed of all the tires. Not a problem as long as all the tires are the same size, even outside the 3% window. But most people don't change their spare to match. So if you have a flat on one of these ABS equipped cars and your spare tire is not within 3% of the rest of the tires, ABS problems can arise.

And ABS problems can be expen$ive! Which is probably the reason for the warning. "We told you not to do that!"

This is the chart I use. I like it because it shows you the tires in pictures so you can see a visual comparison.

http://www.rims-n-tires.com/rt_specs.jsp

That websites tight!

I can use that to find all sorts of rims and see if the offset

will clear the backspacing ahead of time !!

Great Find MARS :rambo:

From my days selling tires, I recall that there were several issues around the 3% figure. Most had to do with varying local regulations, and load capacity safety buffers.

But the brake warning (as I recall) had to do with modern cars with anti-lock brakes. Which is most anything these days. I seem to recall that some ABS controllers get fatally confused if the diameters of the tires are not all similar. After all, ABS works by comparing the relative rotation speed of all the tires. Not a problem as long as all the tires are the same size, even outside the 3% window. But most people don't change their spare to match. So if you have a flat on one of these ABS equipped cars and your spare tire is not within 3% of the rest of the tires, ABS problems can arise.

And ABS problems can be expen$ive! Which is probably the reason for the warning. "We told you not to do that!"

Yeah, go figure though.

Mordern day stuff is the reason why my favorite rim company,Tenzo,

don't make any style for Z cars cause of that front wheel drive

offset crap.

Dang postive offset :mad:., +22, whats that about :rolleyes:

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
×
×
  • Create New...

Important Information

By using this site, you agree to our Privacy Policy and Guidelines. We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.