Inner tube pre-filled with pucture fixing gloop. Pull the thorn out and the gloop escapes.;When it contacts the air, it fills the hole. All you need to do is pump a bit more air in occasionally.;A bit of extra weight but a lot less hassle.;You get 1 tube which will Fit Mountain Bike sizes 26 x 1.75 - 2.125;Weight: 320grams.

• Slime Smart 26 Schrader Valve Mountain Bike Tube x 1

Slime Smart 26 Schrader Valve Mountain Bike Tube x 1Slime