Tire stretch calculator from wheelwhores / tyrestretch

[kalypso123]

I see a lot of threads asking tire stretch questions so I think this will be useful to those of you choosing tires who havent seen this yet.

you can use this tyre stretch calculator from TyreStretch.com - Image Library (http://www.tyrestretch.com) & Welcome to Wheel Whores (http://wheel-whores.com/)

it will calculate your speed, ride height and angle of the sidewall.

http://www.tyrestretch.com/files/Tyre%20Calculator_English.xls (http://www.tyrestretch.com/files/Tyre%20Calculator_English.xls)

http://i219.photobucket.com/albums/cc167/kalypso678/getlive.jpg

original development by Aaron Bohnen.

[Silverbullet]

pretty neat!

it would be better if it gave est on wheel rates, and side deflection.

[fliprayzin240sx]

The only catch is that not every tire are the same. Some tires doesnt like to stretch, and not every company's sizings are the same. 225/40 18 for a Nitto NT05 will not be the same size as 224/40 18 Falken Azenis RT615s. Something for people to consider.

[cdlong]

that is cool, but it would be nice if it was a little more accurate. i've got 16x8 with 225s and it's showing them angled out like there's a bulge. in reality, it's not what i would call a stretch, but if anything, it's angled in, not out. it looks like they assume an 8" wheel is 8" across, which it's not. with the lips, it's more like 9".

[cdlong]

to make it a little more accurate i changed the calculations worksheet a little.

changed C20 from "=Calculator!C16*C38" to "=Calculator!C16*C38+25.4"
and G20 from "=Calculator!I16*C38" to "=Calculator!I16*C38+25.4"

i'd like to change the limits on the graph to mimic the limits of an s14 but i can't figure out how the chart is built. any ideas?

[jserman]

cool idea...