Sorry to thread highjack – but how often does one need to change motorbike tires ? The manual is a bit useless on the subject, and I have conducted a visual inspection and check the pressure regularly but don’t really know what the tread depth should be.
Have done a whole 6000 miles from new so thinking it will be a while yet ?
For me? Any scalloping of the front, squared off rear or less than 1.5 mm at any point the tyre gets binned. By the time it reaches the legal limit you are riding on a very compromised tyre.
As for mileage – depends a lot on riding style – My BSA with a 110/90 cross-ply rear lasted around 7 000 miles, my BMW r 1100 about 3-4 000 miles. I tend to be heavy on tyres. The BMW cost me nearly as much in tyres per mile as petrol