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Best 200 tread wear auto x tires

 
Old 05-09-2019, 05:44 AM
  #41  
Al.B
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Originally Posted by PRE-Z06 View Post
I went with the shorter 285/30 up front since it keeps the ratio the same and lowers center of gravity with the 305/30 being shorter.
Have you used the 275 before too, how does it compare?
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Old 05-09-2019, 08:18 PM
  #42  
PRE-Z06
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Originally Posted by Al.B View Post
Have you used the 275 before too, how does it compare?
I have not on the C6GS, but did on the rear of BS C5FRC and honestly dont think contact patch is much different on a 9.5 wheel though as the 285 is squeezed.

Last edited by PRE-Z06; 05-09-2019 at 08:32 PM.
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Al.B (05-09-2019)
Old 05-10-2019, 06:34 AM
  #43  
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Originally Posted by Al.B View Post
Ya, i want to run the stock 9.5/12 rims. Was thinking maybe running 275 front 315 rear for better balance/rotation instead of 335 rear. Not sure if it will be faster overall though. Wondering what combination they're running at Nationals. I could see the top spots c6z have BFG.

Not new to autocross but will be new to the Vette. Hense some of the newbie questions.
If you're not opposed to running different brands, run the 71R's on the front with the 335 Rivals on the back. That worked better then the 275 Rivals and would still allow you to run the wider rears. Temps were 35F when I compared both setups though.

Not sure what your location is. If you were a local, I'd let you try that combo.

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Old 05-10-2019, 07:40 AM
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Originally Posted by ttx350z View Post
If you're not opposed to running different brands, run the 71R's on the front with the 335 Rivals on the back. That worked better then the 275 Rivals and would still allow you to run the wider rears. Temps were 35F when I compared both setups though.

Not sure what your location is. If you were a local, I'd let you try that combo.
I've considered that too, it's tempting. Running looser tires in the rear hasn't worked great for me in the past. Although these would behave more similar. I've been reading about how differently they behave. Re71r grip right away and fall off as they get too hot. Real hot in South Florida. Then the rivals need to heat up for optimum performance. They seem to behave oposite. It's probably too Minor to really matter but that has me on the fence on which direction to go. Re71,rival,or combo. Down here we run in groups of 3-4 runs at a time with about 10 min between runs in the morning and again in the afternoon. Even though it's hot I'm leaning towards the re71 285/305 to start and maybe try something else the following year. I don't think they will get too hot and greasy with those limited runs.

Last edited by Al.B; 05-10-2019 at 07:47 AM.
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Old 05-10-2019, 07:46 AM
  #45  
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The 335 Rivals wont be loose on the rear paired with the 71Rs on the front. It still had an understeering bias even in the cold. The Rivals are to the point where the wear bars are almost gone compared to like 80% new 71Rs

Managing hot tires is easier than cold tires. You can get a water sprayer and spray your tires between runs if they get to hot.
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Old 05-10-2019, 03:25 PM
  #46  
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Originally Posted by ttx350z View Post
If you're not opposed to running different brands, run the 71R's on the front with the 335 Rivals on the back. That worked better then the 275 Rivals and would still allow you to run the wider rears. Temps were 35F when I compared both setups though.

Not sure what your location is. If you were a local, I'd let you try that combo.
Im considering trying that setup myself this summer as I picked up some used 335s.

Last edited by PRE-Z06; 05-10-2019 at 03:27 PM.
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