Ieohen 2PC Bike Tire Line for 20'' 24'' 26'' 27'' Bike Tube, TPU Puncture Proof Bicycle Tire Liners, for Road, Mountain, MTB, BMX BicyclesThe Best Puncture Prevention -Tire Liners (aka Tube Protectors) shield against punctures from thorns, glass, and road debris - the nemesis of every bicyclist.Ieohen is gentle toward inner tubes, but also has an e..