So I'm about 25k into my Pirelli PZero All Season Plus tires, which came with a factory 50k warranty. I just noticed my rear tires are near the wear indicators. I bought the tires at Tire Discounters. My question is do they typically honor these warranties or do they just find a way to get out of it?

 

Depends on the situation. If there's evidence of abuse (from anything, underinflation, hooning, misalignment, etc), a dealer/mfgr can refuse to honor the warranty but that's pretty rare. Usually what they'll do is offer you a pro-rated exchange towards new tires.

When I was running a repair/tires/alignment shop a few years ago, I think I only questioned one customer on his submission that the tires wore prematurely. (I wanted to refuse but for customer satisfaction issues... I mean, you can't do donuts in the shop parking lot and expect me to believe they "wore prematurely"... )

 

I think most tires have a reduced warranty if you cannot rotate the tires.

From tire rack:

Unlimited Time / 50,000 Miles Half mileage for rear if different size than front

Workmanship & Materials Warranty:Unlimited Time / Free replacement first year or 2/32" wear, then prorated until 2/32" remaining depth