Tire size help!

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Apr 1, 2011 | 06:29 AM

azer666

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Tire size help!

Im planning to switch tyres on my corvette c5 cabriolet-98. It has z06 wheels on right now. Im looking on these combo of tyres. do anyone see a problem with this? For example traction, abs or the speed index?

front 255/30-18 z speed index
rear 295/30-18 y speed index.

Help much appreciated

Apr 1, 2011 | 06:56 AM

just inc

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From: Spring Texas

255/30-18 = 24 inch tall
295/30-18 = 25.2 inch tall

I don't think you will have problems with abs or tc but you will scrape on speed bumps and uneven drive ways for sure.

Apr 1, 2011 | 08:43 AM

azer666

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Quote:

Originally Posted by just inc

255/30-18 = 24 inch tall
295/30-18 = 25.2 inch tall

I don't think you will have problems with abs or tc but you will scrape on speed bumps and uneven drive ways for sure.

Do u mean underneath the car? The car is not lowered at this point

Apr 1, 2011 | 08:55 AM

just inc

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From: Spring Texas

Yes, underneath. Your car will be lower after you put those shorter tires on assuming your going from stock zo6 size tires. What are the current size tires you have on your car now?

Apr 1, 2011 | 09:19 AM

azer666

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I currently have 265 35 18 and 295 35 18.

Apr 1, 2011 | 10:17 AM

just inc

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From: Spring Texas

265/35-18 = 25.3
295/35-18 = 26.1

That will bring your car 1/2 inch lower to the ground but if you don't have any issues with scraping with your current setup you can probably get away with the new one. Also consider that with the shorter tires and riding at stock height your car will have a little more of the 4x4 look.

Apr 1, 2011 | 10:57 AM

azer666

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Will there be a problem with fitting the front tyre on the rim? I mean is the z06 to wide?

Apr 1, 2011 | 11:36 AM

azer666

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Quote:

Originally Posted by 8VETTE7

That all depends on the width of the rims you have on the car now. Front and rear 18" are not factory diameters for the Z06 so it's anyones guess of the rim width that your aftermarket rims are. Tire sizes you have chosen have the following rim width requirements:

Tire RIM

255/30 - 18 8.5-10"

295/30 - 18 10-11"

Ok, how do I find out what width my rims have? Probably would be the same on rear and front?