Originally Posted by
chaadster
I don’t agree with that, and the statement from Vittoria which I posted upthread supports the idea that if high temp induced tube failure is the problem, then eliminating the tube by going tubeless will eliminate the problem and greatly reduce the risk of tire blow-off.
In that statement, Vittoria say their tires are tested to 200% of maximum pressure, so if we assume a 100psi max tire inflated to 90psi at 70ºF cold, then brake heated to 284ºF— the top end of the range which Vittoria said would “destroy” the tube— then the Ideal Gas law tells us the pressure at 284º would be 132.3psi, well below the tire failure pressure.
Also, because tubeless supports lower pressure, it provides an additional level of overheat protection.
What makes you believe the tyre can withstand more heat than the tube? The tyre is in direct contact with the backside of the brake track. The tube is not. Imo the likely failure mode is the the bead coming off the tyre or the tyre blowing off of the rim from heat and pressure, not the tube melting. - assuming its a normal butyl tube.