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08-10 SS Turbocharged General Discussion Discuss the 2008 - 2009 Chevy Cobalt SS Turbocharged. On sale since the second quarter of 2008.

Best tire size for SS/TC for road coarse track

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Old Jan 14, 2010 | 06:02 PM
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  #26  
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tom.g
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Originally Posted by Terminator2
Tread width is appox 8 inches on the stock 225/40/18 Contis. The Porshe spec 225/40/18 Contis sportcontact2s are 8.9" wide using the whatever measuring technique they use.
Are our Conti's the "Porshe spec"?
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Old Jan 14, 2010 | 06:36 PM
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Terminator2
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Originally Posted by tom.g
Are our Conti's the "Porshe spec"?
Nope if you look on tire rack ours are the extra load (XL) rated ones not the Porshe spec ones.

Originally Posted by firerat
I hope you meant 235/45/17...unless you like having your speedometer reading way off
It would be off approx 4% or 2 mph at 50 mph. 50 mph indicated would be 48 mph actual. It would be off in a good way not like going from a 265/70/17 to a 325/80/17.
Last edited by Terminator2; Jan 14, 2010 at 06:36 PM. Reason: Automerged Doublepost
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Old Mar 14, 2016 | 09:20 PM
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almcphee
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I have Bridgestone RE-71 R (235/40/18) and they are great.
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Old Mar 18, 2016 | 11:49 AM
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The Conti are complete crap. Dunlop Direzza ZIIs at 235/40/18 are good. You'll like that.
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Old Mar 18, 2016 | 11:59 AM
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This thread is 6 years old. No need to bump it.
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Old Mar 21, 2016 | 02:53 PM
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Originally Posted by cluelessk
This thread is 6 years old. No need to bump it.
Why? track tires change every year. Be good to keep up on what tire is good, unless there is a different thread.
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