TIRE QUESTION! how to determine total hight??

[colt zantop]

howdy everyone, this is probably a stupid question but Ill ask anyway, I am running 17's on my camaro right now. Im moving up to 18's but I want the same exact ride hight, I am running 225-45-17 up front NOW and 285-40-17 in the rear NOW. what size profile will make up for that inch Ill be gaining in rim size? Ill have to drop my profile size....how is that measured?? basiclly I need to lose an inch when moving to 18's ....any help would be great! thanks!

[elcamino80]

Lets see

(225mm x 0.45) = 101.25mm

101.25mm - 25.4mm= 75.85mm

75.85mm / 225mm = 0.337 ---> 35 profile tire up front...

And 285/40-17 ---> 285/30-18

[colt zantop]

thanks for the quick reply! I get it now that its broken down.....I feel dumb! LOL

[TonyL]

sorry it took so long to get back to you.

Here is the info you need.

[colt zantop]

thanks Tony!

[TonyL]

so based on that math, your overall tire diameter up front is 24.972 now.
a 225/35 would give you 24.200 and a 225./40 would be 25.08 overall.

[elcamino80]

I thought about the x2 there but i figured it couldn't be because if thats the case i would have 5.5" of sidewall... That sounded too much too me so i dropped the x2...

Have to measure it someday though

[TonyL]

what are your tire measurements christer?

[TonyL]

Oh. My. God. Look how cool THIS is.

all you do is plug the numbers in and it converts it for you. and shows a graphic comparison... Its awsome!!!!!

[colt zantop]

wow...you guys found some really cool stuff! this makes it a whole lot easier!!!!!!

[Ralph LoGrasso]

Tony,

That last one is a pretty sweet!

[TonyL]

i created a new thread and stuck it.

[elcamino80]

they are 235/60-14


edit: very cool tool you found Tony

[BRIAN]

Even easier, go to Tire Rack and punch in your tire and hit specs. It shows all tire demensions and width of rim measured on. I would use MFG measurements as not all same size tires measure the same. You will see different measurements from dif mfg within the same size.