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View Full Version : TIRE QUESTION! how to determine total hight??



colt zantop
12-16-2004, 05:24 AM
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
12-16-2004, 06:17 AM
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
12-16-2004, 07:32 AM
thanks for the quick reply! I get it now that its broken down.....I feel dumb! LOL

TonyL
12-16-2004, 07:33 AM
sorry it took so long to get back to you.

Here (http://www.pepboys.com/learning_center/car_care/articles/tire_diameter.html) is the info you need.

colt zantop
12-16-2004, 07:40 AM
thanks Tony!

TonyL
12-16-2004, 07:41 AM
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
12-16-2004, 09:06 AM
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... :hammer:

Have to measure it someday though :cheers:

TonyL
12-16-2004, 10:20 AM
what are your tire measurements christer?

TonyL
12-16-2004, 10:26 AM
Oh. My. God. Look how cool THIS (http://www.1010tires.com/TireSizeCalculator.asp?action=submit) is.

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

colt zantop
12-16-2004, 10:38 AM
wow...you guys found some really cool stuff! this makes it a whole lot easier!!!!!!

Ralph LoGrasso
12-16-2004, 10:44 AM
Tony,

That last one is a pretty sweet!

TonyL
12-16-2004, 10:50 AM
i created a new thread and stuck it.

elcamino80
12-16-2004, 11:17 AM
they are 235/60-14 :lmao:
:lol:

edit: very cool tool you found Tony

BRIAN
12-16-2004, 02:05 PM
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.