On a side note, I did lose one of the TPU tubes in this ride. Fortunately, it was the rear. Also fortunately, it happened while at the crest of a hill before I picked up any speed. Even more fortunately, the crest of that particular hill is the point before my single fastest descent when I frequently hit about 30-32mph for almost a half mile. I shudder to think of how bad things could have gotten had it been the front tire that failed at max velocity.

Upon inspection, the tube failed right at the joint between the main tube and where the valve stem is bonded. No idea what could have caused it. It was a brand new tube, installed yesterday and aired up to 90psi. It was a rapid loss of pressure, I actually heard it pop. But no idea why though. I didn't hit anything with the tire before the failure.