Got 4/32's left on my rear Pilot Super Sports, under normal driving conditions, how many more miles can I expect out of these?

 

Are you measuring full tread depth or tread depth to the wear bars? If full tread depth the tires are probably close to being due to be changed right now.

My tires have road hazard coverage and the road hazard is rendered void if tire tread depth is less than 3mm which is approx. 0.118". 4/32 is 0.125" so based on that 3mm depth the tires are probably very close to being at their replace by wear point.

Also, there is another risk at play with worn tires: While my experience is the tire wear seems to slow down as the tire wears worn tires are more at risk of a puncture. Often enough with worn tires -- trying to nurse another couple of thousand miles from them -- often enough a nail or something puts a hole in the tire and sometimes the tire is not repairable. So the tire life gets cut short.

You have to consider too that at 4/32 the tires will not perform very well in wet conditions. If you never drive in the rain or on wet roads that may not matter. But if the car is an everyday car you might want to think about installing new tires to have the max. tread depth for driving in wet conditions.

 

At the risk of appearing ****, here's what I use to track my tire depth.

 

Depends on how hard you push the pedal

 

Also you will find that the insides will be your limiting factor. You can still have 3-4mm in the middle to outside, but the inside edges will see you almost through, look for the difference in colour.