still can use, but if it continue to peel more and causing your ride to be bumpy and having unpleasant sound then is time to change

bumpy as in your tyres is like hitting a bump constantly like there is something stucked on the your tyres, imagine driving on a tyres that is bloated/pregnant, if your tyres has flat spot or broken thread block you will have the same feel too, and you absolutely need to change the tyres as soon as possible

if bumpy because of your tyres stiffness or over pressure, then that is not really a big problem

in term of noise, it is dependent on the tyres, older tyres will have more noise when the thread wear off more, if you cant stand the noise then change to a better tyres

tyres rubber compound will get harden through the repeat heat cycle from driving, if the compound harden you will have more noise and not so grippy in certain driving condition even though there is plenty of thread left, so that's the sign to change the tyres too

This post has been edited by amduser: Aug 22 2022, 08:28 AM