I have a lead foot and towed my boat and have done just fine. I have put 10k miles on my Bridgestone Azenza's wrapped around 22's and I can't tell a difference in the wearing from the day I bought them...

 

hey i have 29,000 on mine and i can still fit a nickel in the groves. just rotate them every 6,000 miles and you should be good

 

I've got 24K on my stock Alenza's with next to no wear. Tread measures down 1/16th of an inch at most. I've got a lead foot but I drive a lot of highway too as the 24K is since last Christmas.

Not to change subjects but I put some Goodyear Fortera Triple Treads on my oem rims for winter a couple weeks ago. So far wet traction is significantly better and hopefully they will be decent in the snow.