Thorn Buster Inner Tube Protecting, Bicycle Tire Liner - stop flats for BMX Bikes using GREEN 20 x 2.0-2.125&rdquo;&nbsp; bike tires and tubes with hard durometer center strip. (1 liner) Best Solution for Preventing Puncture Flats - Tire Liners are the best solution Best Value - Compare the price! Top quality at low price because there is no packaging. No plastic package to add to the landfill. Best Tire Liner for tube protection against thorns and road debris - Tougher than Tuffy. Stop flats better than Stop Flats. Lab tests prove there is no other bicycle tire liner better at protecting bicycle inner tubes against puncture flats. High durometer center strip nearest to the tire maximizes resistance to thorns and other road debris. Softer, lower durometer back and edges touch the inner tube to prevent chaffing. Sizes to fit 9 sizes of tires and tubes. See other listings Buy only what you need - Why buy two if you only want one? We offer a single liner. Buy two only if you need two.