Originally Posted by
Crankycrank
I worry about those plastic valves and using a mini pump with no hose or no proper chuck as it will wiggle the valve and possibly break it. Having a plastic valve is part of the reason those tubes are so lightweight but seem a little fragile to me. Any experienced TPU'ers have problems with this? I wouldn't mind trying them on my bike if the price wasn't so high but they sound interesting.
You have every right to be concerned because they have been breaking just as you are worried about them doing.