Well I was looking for solution to find off-road tyres for 17" rims. You can find rear one but no such size for front. So I decide to replace all set. In Ukraine Qingqi's dealers saling both type of bikes - motard (as I have) and enduro (as CrasyCarl's bike). So I just bought all set with bearings and brake discs (just to sitch its quick if I will need to).