Hi All, Guaranteed at one stage we have all experienced a bicycle wheel tire puncture, which does happen when we least expect it. Soon to come will be the a airless bicycle wheel tire which is also proven to be much more lighter in weight and faster on roads plus dirt tracks. There are a few of these clips on Youtube, if you are interested to find out more. To be quite frank with you I am not sure about how these are to be sold, most likely you will need to buy the whole entire wheel. For us initially, it will be expensive, BUT in the long run you will get the peace of mind that we all have been wishing for. Whatever the cost I will buy a set for the front and mainly the back. What do you all reckon, good idea or bad idea? Including the costing aspects. Mountainsport.