i have a 2007 is350 and they have potenza stock tires on them...
i was wondering how long do they usually last average wise.. i was just wondering b/c mine front tires are looking really bald.. and i have about 25k mile on my car

 

lol 20 k on my car

 

haha, well I have my 18" stock summer tires. I've only put 1-2K on them or so. If you ever need to replace your tires, I'd sell them relatively cheap...

I don't need them because I use 19" wheels in the summer now.

 

You need to replace the fronts asap. Mine were bald and I was spinning out with very little rain so I just replaced the fronts last week. So much better now. Your rears are so powerful the fronts have to get good grip so you don't fishtail.

 

i've got 26k on my fronts.. and still no prob... the rearss... as well