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Old 04-06-2011, 05:13 PM
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pointandgo pointandgo is offline
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Originally Posted by Emission View Post
Speed ratings are very complicated. I drove a Ferrari 599 at 205 mph, a McLaren SLR at 204 mph, and an Audi R8 V10 at 195 mph. In each case, the vehicles were above 186 mph (the tire speed rating "Y") for no more than 15 seconds - I just watched the video and timed it. The venue was a long airport runway. The P Zero tires were brand new (that morning), and the ambient temps were cold. Heat is the big enemy at that speed, not centrifugal force, so I was hardly worried.*

The story runs on Autoblog this Friday.

- Mike

(Note: That is not my lame open-face helmet I am holding in the picture below.)

* I was worried I was going to die... but more exited about going 200 mph than anything else.
I'm sure the McLaren has "bracket" Y. Too dangerous otherwise for its speed capability. 19 mph over 186 (max for non-bracket Y) shouldn't be a problem for virgin tires...short duration...very short, with few such cycles, properly inflated. Don't mean to be too "motherly" but check the PSI yourself before screaming off...we need you here! Seen too many high speed lab failures in my life. Looking forward to the blog!
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