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.* Thorns or glass that may penetrate the tire are blocked from the inner tube* Recyclable - Use from bike to bike* Weighs less than liquid fills and thorn - resistant tubes* Will NOT cause tire or tube damage - or loosen spokesItem Specifications---Labeled Size: 700 x 25 & 27 x 1 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.
- Thorns or glass that may penetrate the tire are blocked from the inner tube
- Recyclable - Use from bike to bike
- Weighs less than liquid fills and thorn - resistant tubes
- Will NOT cause tire or tube damage - or loosen spokes
