Stop Flats2 liners are made of durable, lightweight polyurethane and when inserted between the bike tire and tube, they provide a protective layer between road hazards and the inner tube.
Stop Flats 2
Weighs less than liquid fills and thorn - resistant tubes
Will NOT cause tire or tube damage - or loosen spokes
Thorns or glass that may penetrate the tire are blocked from the inner tube
Recyclable - Use from bike to bike
Labeled Size: 29 x 2.0-2.125