After 15,000kms the 110/80-18 and 170/60-17 rear are done. Due to a few trips on straight roads the centre tread is worn out for once. last set the softer sides wore right down as well as the centre. Tyres had dyna beads in the whole time, running 36F 42R pressures. No wobbles regardless of wear. Last set lasted 17,000kms, but the extra 2,000kms must have been using the side tread a bit more rather than the centre.