Are they too fragile? I had the MTB ones with some Supersonic Speed Kings and I picked up multiple punctures back and front in one outing.
I need some new ones for road racing only.
On another note the ones I have, have removable valves. Okay but every time I undo them to put air in, the valve comes undone and not the little locky bit. Thinking could I put some sort of sealant in them and lob'em on my trainer?