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Old Sep 18, 2014 | 01:18 AM
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Default Tire size
I have a 99 C5 with 18s up front and 19s in the rear and I need new tires. Right now it has 275/35/18s up front and 295/35/19s in the back. Could I switch to a 285/35/19 in the rear without causing ABS/TC/or active handling issues? There is so much more available in a 285.
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Old Sep 18, 2014 | 01:44 AM
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Originally Posted by Threesixes
I have a 99 C5 with 18s up front and 19s in the rear and I need new tires. Right now it has 275/35/18s up front and 295/35/19s in the back. Could I switch to a 285/35/19 in the rear without causing ABS/TC/or active handling issues? There is so much more available in a 285.
I run 305/40/19 on my rear!
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Old Sep 18, 2014 | 12:31 PM
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Originally Posted by 8VETTE7
Should work. General rule of thumb is that the rear tire needs to have an overall diameter of 1/2" to 1 1/2" larger than the overall diameter of the front tire to avoid TC/AH issues.

The 275/35-18 front has an overall diameter of about 25.6".

A 295/35-19 tire has an overall diameter of about 27.1" for a delta of 1.5".

A 285/35-19 tire has an overall diameter of about 26.8" for a delta of 1.2"
Thank you! That's exactly what I needed to know.
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Old Sep 18, 2014 | 01:08 PM
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What year is your car? The later years are less sensitive.
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Old Sep 18, 2014 | 01:24 PM
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Originally Posted by SoDiezl350
What year is your car? The later years are less sensitive.
Its a 99
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Old Sep 18, 2014 | 01:31 PM
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Originally Posted by wardamncorvette
I run 305/40/19 on my rear!
I hope that is a typo.
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Old Sep 18, 2014 | 01:45 PM
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Originally Posted by Threesixes
Its a 99

In that case stick to the guidelines provided above.
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Old Sep 18, 2014 | 07:04 PM
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For the C5 we normally do the following tire sizes

275/35/18 & 295/35/19

or

285/35/18 & 295/35/19

We have done a 305/30/19 rear as well
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Old Sep 19, 2014 | 12:20 AM
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Originally Posted by need4speedmotors
For the C5 we normally do the following tire sizes

275/35/18 & 295/35/19

or

285/35/18 & 295/35/19

We have done a 305/30/19 rear as well
Are you saying that you don't think the 285/35/19 will work in the back? That tire is half the price and I'm planning to trade my car in soon. It has almost 200K on the odometer and no power related mods. Traction isn't an issue.
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Old Sep 19, 2014 | 01:45 PM
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Originally Posted by Threesixes
Are you saying that you don't think the 285/35/19 will work in the back? That tire is half the price and I'm planning to trade my car in soon. It has almost 200K on the odometer and no power related mods. Traction isn't an issue.
285/35/19 can work in the back as well.

A vast majority of our members we help out like having the widest setup possible for their new wheel setups.
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Old Sep 19, 2014 | 02:29 PM
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Most folks with 18/19 setups run with either:

265/35/18, 305/30/19
or
275/35/18, 305/30/19

Toque
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