The brakes on the 60 are the same as the 31 but yet the 60 is about 5000lbs more. Your blow a tire and abort the brakes will fry fast on the side that the tire was blown and now you only have 2 of your 4 brakes working, my guess is that they blew a tire at very high speed aborted and cooked the brakes (sparks reported) and went off the end.