Tubliss Bladder Set for Tubliss Tire System, Inner Bladders Only 1 -18" Bladder and 1- 21" Bladder 2 minute tire repairs: without the tubes you can now plug tires in just seconds with standard tubeless tire plugs (no need to remove the wheel) Super durable, when properly installed and maintained they can out last your bike, much more economical than buying countless tubes 100 PSI where you need it, run as low as 0-10 PSI where you want it Inner bladder only for the Gen 2.0 system Pounds lighter than heavy duty tubes Massive traction gains, 2x traction Ultimate upgrade Tires last longer No pinch flats Plusher ride For Off-Road use only.