Decided to try some TPU tubes. First I got some Schwalbe Aerothan from BikeInn, for 23-28 tires, 41grams. Running Veloflex Corsa Race 25’s, psi at 95-100. Two nice rides of 45 and 35 miles. Intrigued by the technology, went for some Cyclami tubes off Amazon, with a steel valve, only 38g. Thought the steel valve might last longer. Anyway first ride with Veloflex Corsa 28’s, 80 psi. 18 miles and the front tire exploded, the hole being next to the end to end seam. Brought a butyl tube and my normal flat kit, but then I had nothing if the rear tube flatted. Made it home. Next day returned the tube to Amazon via Whole Foods. When I got home that afternoon, the rear tire was flat! Today the replacement arrived. Two flat tubes on one ride! Before mounting, I carefully pumped enough air to check for leaks in water, easy installation as they are so slippery, and the 28’s weren’t new. Think the new one and the flat are going back for a refund! On todays 35 mile ride the with Aerothan tubes, I carried 2 butyl tubes and repair kit, to be safe. Any suggestions would be appreciated.