Kumho V720 ACR viper tire..
Any tried running the 295 25 19 ACR Viper front tire on the front
and the 305 30 19 non viper tire but could have shaved and heat cycled just like the 355 30 19s that come on the rear of the viper 179.00 fronts 241.00 rears 179.00 sq setup? |
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He flat out said do 295 square. Said its Magic! That being said I dont have the money to be testing all the new tires this year. I would love to test this Vs what to me is the benchmark for me, the RE71R. Also with the new falken out soon in a 315/30(eta is summer on those) |
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I know Colby Shield runs the ACR tires 295 square on his SS 1LE in Gridlife Time Attack, they're faster than an RE71R.
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ebay free ship to 179
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The Viper version of the V720 is a different compound than the regular V720. The regular V720 really is only made to sustain up to autox demands, not track demands. Kuhmo has even said this before and I can attest that the regular V720 do not hold up on track (on lighter cars than the Camaro).
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Yes the ACR tires are illegal in almost every 200TW class
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Right from the SCCA Time Trials Rule book
E. The tire must not appear on the following exclusion list, which may be altered at any time by the Time Trials Board (TTB) upon notification of membership. - Kumho V720 ACR (less than minimum molded tread depth) |
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They aren't specifically listed in the SCCA Time Trials list, but the way their tire rules are written make them illegal:
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Now, why Kumho decided to use a different (much, much, much crappier), autox-specific compound on their regular version is beeeeeyond me, as if their normal was anything close to what the Viper version was, they'd be selling a lot more. |
I am running 305 RE-71's in the front and the 355 Viper Kumho's in the rear, it is the best grip i have had so far and I have ran a lot of different sizes in my short 1800 miles of ownership.
305/30R19 front 325/30R19 rear 285/35R19 front 285/35R19 rear 305/30R19 front 305/30R19 rear 325/30R19 front 325/30R19 rear 305/30R19 front 355/30R19 rear |
What rim do you run the 355s on? And the dimensions and offset? Any spacers?
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