Trek is a big enough company that the lifetime warranty isn't a problem for them. I know they still warranty really old bikes. I'm a little surprised when I hear about them rejecting warranty claims. This started in the earliest days, I used to handle warranty claims and Bevil Hogg would always help the dealer. I was a teenager and some of those claims were nonsense, but he was wiser. And needed dealers. Of course, predicting the growth that they have seen from the perspective back then was a real leap of faith.