The T100 had just rolled over 15,000 km's (9375 miles) when I put it away last fall. The rear tire was worn down to the wear bars/indicators built into the tire. The front tire was worn down to just a hair above the wear bars and wouldn't pass vehicle safety inspection this year.That is not bad use on them at all for both of you
That's good mileage and I'm happy with that.
Regardless of the safety inspection, I was going to replace them anyway. Tires and brakes are no place to be cheap.