[Grabber]

Originally Posted by radz28

How about you research before posting incorrect data. Those are new tires for '12... GM puts cages in most if not all it's cars that they test on tracks. The cage is for safety.

http://www.chevrolet.com/corvette-zr1-sports-car/

This was not a 2012 ZR1 that was tested though.

Also, I know what a cage does. It's not for ONLY safety.

You seem to be bent on not admitting the ZR1 was modified, and could still run a 7:19 without a Cage, and other equipment, and DOT approved Radials.

Yet, here are some more listings.

20,600 m (67,600 ft)7:26.4Chevrolet Corvette C6 ZR1 (2009)Jim Mero27 June 2008General Motors conducted test,[20] base specification car with stock tires and non-stock safety equipment, video confirmed.

20,600 m (67,600 ft)7:38Chevrolet Corvette C6 ZR1Horst von SaurmaOctober 2009Sport Auto conducted test,[34] Michelin Pilot Sport ZP run-flat tires used.