Tires
Thread Starter
Team Owner
Joined: Mar 2005
Posts: 20,933
Likes: 905
From: salem OR
Tires
Since the stock size runflat SS Michelin is expensive and hard to get. I replaced
my Ps2 ZR1 tires with the SS non run flat in the next size down.
front and rear which are 325/25/20 and 275/30/19.
Just 10 mm narrow and .2 tenths shorter they lower the car about a 1/2 inch all the way around. They ride a lot smoother and a lot less noise and are 900 cheaper a set.
great tire choice IMO they are going on the 2015 if it is going to as noisey as I think it will be.
my Ps2 ZR1 tires with the SS non run flat in the next size down.
front and rear which are 325/25/20 and 275/30/19.
Just 10 mm narrow and .2 tenths shorter they lower the car about a 1/2 inch all the way around. They ride a lot smoother and a lot less noise and are 900 cheaper a set.
great tire choice IMO they are going on the 2015 if it is going to as noisey as I think it will be.
Race Director
Joined: Dec 2000
Posts: 14,697
Likes: 584
From: Sioux Falls SD
non run flat in any brand does seem to effect road noise especially when they get worn it seems wouldnt mind switching to non runflat either but with mine going to be a road trip car would rather be safe then sorry
Le Mans Master
Joined: Jan 2009
Posts: 6,685
Likes: 1,249
From: NYC
2015 C7 of the Year Finalist
I will not drive without run flats.
I hit a pot hole at 60mph at 1 am in the pouring rain on an interstate, 80 miles from my home. I had a 1 inch gash where the sidewall meets the threads. I called OnStar and was told I could drive 100 miles on the flat at 55mph. I did and got home safely.
I hit a pot hole at 60mph at 1 am in the pouring rain on an interstate, 80 miles from my home. I had a 1 inch gash where the sidewall meets the threads. I called OnStar and was told I could drive 100 miles on the flat at 55mph. I did and got home safely.
Safety Car
Joined: May 2000
Posts: 4,827
Likes: 352
From: Albuquerque NM
As soon as non run flat Super Sports are available in the stock sizes I will switch out the Cup 2's.
I've been running conventional tires on my Vettes since Feb of 2000, and they are far superior in terms of ride, noise, and traction to a similar but run flat tire.
As far as preparing for flats, I've got a cell phone, AAA coverage, a can of fix-a-flat, and a compressor in the car. None of which have I had to use.
I've been running conventional tires on my Vettes since Feb of 2000, and they are far superior in terms of ride, noise, and traction to a similar but run flat tire.
As far as preparing for flats, I've got a cell phone, AAA coverage, a can of fix-a-flat, and a compressor in the car. None of which have I had to use.
Race Director
Joined: Feb 2011
Posts: 14,741
Likes: 5,605
From: AZ
Since the stock size runflat SS Michelin is expensive and hard to get. I replaced
my Ps2 ZR1 tires with the SS non run flat in the next size down.
front and rear which are 325/25/20 and 275/30/19.
Just 10 mm narrow and .2 tenths shorter they lower the car about a 1/2 inch all the way around. They ride a lot smoother and a lot less noise and are 900 cheaper a set.
great tire choice IMO they are going on the 2015 if it is going to as noisey as I think it will be.
my Ps2 ZR1 tires with the SS non run flat in the next size down.
front and rear which are 325/25/20 and 275/30/19.
Just 10 mm narrow and .2 tenths shorter they lower the car about a 1/2 inch all the way around. They ride a lot smoother and a lot less noise and are 900 cheaper a set.
great tire choice IMO they are going on the 2015 if it is going to as noisey as I think it will be.
Race Director
Joined: Feb 2011
Posts: 14,741
Likes: 5,605
From: AZ
Since the ZR1 tires are the same size as the C7 Z06 tires, the OP indicates he is using the 275/325 PSS non-RFT's in the 19/20 size.
There are limited tire choices in the 285/30-19 and 335/25-20 sizes. The OEM PSS and Cup2 tires are the best choices now, in my opinion, but some people have tried non-stock size snow tires and other tires that will perform better in cold weather. As with all choices in tires, each person will have to evaluate the tradeoffs for looks, noise, treadwear, traction (cold, wet, hot, track, drags) cost and ZP or not.
Nitto Invos are available in 285/345 sizes. I'd classify this tire in the quiet, good treadwear, low price category.
There are limited tire choices in the 285/30-19 and 335/25-20 sizes. The OEM PSS and Cup2 tires are the best choices now, in my opinion, but some people have tried non-stock size snow tires and other tires that will perform better in cold weather. As with all choices in tires, each person will have to evaluate the tradeoffs for looks, noise, treadwear, traction (cold, wet, hot, track, drags) cost and ZP or not.
Nitto Invos are available in 285/345 sizes. I'd classify this tire in the quiet, good treadwear, low price category.
Le Mans Master
Joined: Jul 2013
Posts: 5,191
Likes: 3,388
From: Morrill Nebraska
Since the ZR1 tires are the same size as the C7 Z06 tires, the OP indicates he is using the 275/325 PSS non-RFT's in the 19/20 size.
There are limited tire choices in the 285/30-19 and 335/25-20 sizes. The OEM PSS and Cup2 tires are the best choices now, in my opinion, but some people have tried non-stock size snow tires and other tires that will perform better in cold weather. As with all choices in tires, each person will have to evaluate the tradeoffs for looks, noise, treadwear, traction (cold, wet, hot, track, drags) cost and ZP or not.
Nitto Invos are available in 285/345 sizes. I'd classify this tire in the quiet, good treadwear, low price category.
There are limited tire choices in the 285/30-19 and 335/25-20 sizes. The OEM PSS and Cup2 tires are the best choices now, in my opinion, but some people have tried non-stock size snow tires and other tires that will perform better in cold weather. As with all choices in tires, each person will have to evaluate the tradeoffs for looks, noise, treadwear, traction (cold, wet, hot, track, drags) cost and ZP or not.
Nitto Invos are available in 285/345 sizes. I'd classify this tire in the quiet, good treadwear, low price category.
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Thread Starter
Team Owner
Joined: Mar 2005
Posts: 20,933
Likes: 905
From: salem OR
I'm not sure if you are talking about a ZR1 given the reference to the PS2's, but if the they are and you compare to the non ZP PSS in the sizes you quote, then you are right the tires are 0.2" and 0.3" shorter diameter, which would lower the car 0.1" F and 0.15" rear, a long way from the 1/2 inch you state. Did you adjust the lowering bolts to get the additional lowering?
Much better ride and way less noise from the tires.
Advanced
Joined: Jun 2013
Posts: 75
Likes: 3
From: Garden Ridge TX
As soon as non run flat Super Sports are available in the stock sizes I will switch out the Cup 2's.
I've been running conventional tires on my Vettes since Feb of 2000, and they are far superior in terms of ride, noise, and traction to a similar but run flat tire.
As far as preparing for flats, I've got a cell phone, AAA coverage, a can of fix-a-flat, and a compressor in the car. None of which have I had to use.
I've been running conventional tires on my Vettes since Feb of 2000, and they are far superior in terms of ride, noise, and traction to a similar but run flat tire.
As far as preparing for flats, I've got a cell phone, AAA coverage, a can of fix-a-flat, and a compressor in the car. None of which have I had to use.
Thread Starter
Team Owner
Joined: Mar 2005
Posts: 20,933
Likes: 905
From: salem OR
Race Director
Joined: Feb 2011
Posts: 14,741
Likes: 5,605
From: AZ
As soon as non run flat Super Sports are available in the stock sizes I will switch out the Cup 2's.
I've been running conventional tires on my Vettes since Feb of 2000, and they are far superior in terms of ride, noise, and traction to a similar but run flat tire.
As far as preparing for flats, I've got a cell phone, AAA coverage, a can of fix-a-flat, and a compressor in the car. None of which have I had to use.
I've been running conventional tires on my Vettes since Feb of 2000, and they are far superior in terms of ride, noise, and traction to a similar but run flat tire.
As far as preparing for flats, I've got a cell phone, AAA coverage, a can of fix-a-flat, and a compressor in the car. None of which have I had to use.
Turn 12!
Joined: Jan 2008
Posts: 5,976
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From: The Beach
Team Owner
Joined: Sep 1999
Posts: 41,732
Likes: 1,718
From: Springfield MO
impossible.
Thread Starter
Team Owner
Joined: Mar 2005
Posts: 20,933
Likes: 905
From: salem OR
Thread Starter
Team Owner
Joined: Mar 2005
Posts: 20,933
Likes: 905
From: salem OR
Team Owner
Joined: Sep 1999
Posts: 41,732
Likes: 1,718
From: Springfield MO
A tire that is "shorter" .2" in diameter is .1" shorter in it's radius thus the distance between the axle and the pavement would be .1" less than with the larger diameter tire taken off, not .5".
As Tadge says, "do the math". .1" does not equal .5".