Michelin slick failure
08-24-2011, 05:23 PM
#16
Burning Brakes
Join Date: Mar 2006
Location: Montréal, Québec, Canada
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I would speculate on low pressure early. I prefer to go out with 24/25 PSI and bleed them down.
I also prefer to keep it a little higher hot. 31/32 PSI. The wear patterns seems to support this.
Michelin slicks require very high pressures to get seated when mounting. They are a PITA to mount/unmount.
Anyway. Welcome to the "Prematurely Used Up Slick" club, Chris. They are very sensitive to setup and changes in conditions that don't do as much to r-comps can ruin a slick very quickly.
I butchered my slicks at Calabogie because the place wants more camber than Tremblant. Could have lasted another 5-8 heat cycles otherwise.
I also prefer to keep it a little higher hot. 31/32 PSI. The wear patterns seems to support this.
Michelin slicks require very high pressures to get seated when mounting. They are a PITA to mount/unmount.
Anyway. Welcome to the "Prematurely Used Up Slick" club, Chris. They are very sensitive to setup and changes in conditions that don't do as much to r-comps can ruin a slick very quickly.
I butchered my slicks at Calabogie because the place wants more camber than Tremblant. Could have lasted another 5-8 heat cycles otherwise.
08-24-2011, 11:13 PM
#17
Rennlist Member
Thread Starter
The tires were only 4 days old when they failed. I ran the first heat cycle at 24psi cold so i don't think they were under inflated. Many guys run them at 21psi cold as a starting temp.
The first sessions on them I was not running too hard, I had never run on slicks before and wanted to see how they felt and worked my way to the edge of adhesion.
The front tires were also starting (see pic). These were N1 tires so made for P cars so the weight should not be much of an issue....again, lots of guys run these with success.
The tires were new (this year) and the rear were S9H which are the new compound it seems.
Looks like Michelin may be willing to replace them under warranty for me. Thanks you Speedmerchants for helping out!
The first sessions on them I was not running too hard, I had never run on slicks before and wanted to see how they felt and worked my way to the edge of adhesion.
The front tires were also starting (see pic). These were N1 tires so made for P cars so the weight should not be much of an issue....again, lots of guys run these with success.
The tires were new (this year) and the rear were S9H which are the new compound it seems.
Looks like Michelin may be willing to replace them under warranty for me. Thanks you Speedmerchants for helping out!
08-25-2011, 10:19 PM
#21
Nordschleife Master
Ah yes Chris, chasing down the .2RS in the 996, second only to chasing down the Cups.
Anyway, could be urban legend, but I heard a couple of guys talking about how these slicks can blow up without warning, and why they did not use them anymore. I found this very odd as this is a racing tire, but this is definitely what was said.
Can't remember who or when (it's an age thing), but possibly at the club race at Mosport???
Anyway, could be urban legend, but I heard a couple of guys talking about how these slicks can blow up without warning, and why they did not use them anymore. I found this very odd as this is a racing tire, but this is definitely what was said.
Can't remember who or when (it's an age thing), but possibly at the club race at Mosport???
