Tire liners gave me a flat.
I’m assuming it was because I was using high volume tires (2.0”) at moderate pressure (50psi). I couldn’t figure out what was going wrong, or why I would be getting a flat – but looking at the tube it was clear where then end of the tire liner had worn into the tube, eventually causing a slow leak, then a flat.
Maybe at 120psi that isn’t a problem, but I have lost my faith in them…