Cage free - post your bike(s). in Everything Else Posted December 4, 2019 Depends how many nails, screws and other sharp objects are scattered on the road, and the weather conditions dictating my mode of transport for general commuting. Averages about once a year given my current riding habits, although could be twice in the next 12 - 14 months given some of my planned trips. Will go through a set of tyres on a single trip in 2021... also about £600 in petrol for at current prices. Shall have a rather sore backside after that for sure!