Overall, it's just guesswork. I would and do look at ratings online, but really, you never know what kind of service you're going to get. I don't know what happened to Michelin, but if they are going to fail that fast just due to basic poor quality, then I just don't think there are a lot of rules any more.
P.S. I probably should just give some additional advice as a car guy. If you are concerned about your safety, buy a soft, sticky tire. Not an expensive tire, a soft tire. The mainstream thrust of tires is to make them last longer, and you don't want that. So you will have to fight a wave of ignorance headed the wrong direction. There is a lot of oil in a tire. It would surprise you how much. The tire will lose some of that and get harder over time, and so if you think the tire is not as sticky as it was new, replace it. Tread is not really a factor for you.
I recently replaced Michelin Defenders with 90k warranty, but they only latested 40k miles over 6-7 years, so aged out (also they were showing some small cracks). At 5 years, they had 35k and were already down to 4-5/32 thread left. Trying to claim warranty requires good documentation of rotations and wearing down to levels I'm uncomfortable with. Had to get to 2/32 before 6 years, which wasn't going to happen (seems poor treadlife is not uncommon with the Defenders, just google it). I changed them out for Yokohama Avid Ascends that was less expensive (still has a long 85k mileage warranty, but it was not a factor). I could have saved even more by going with a cheaper tire, but I think performance would have suffered. Quiet, comfortable ride and wet traction are my main concerns, and so far I'm happy with the new tires.mmmodem wrote: ↑Tue Feb 11, 2020 12:05 pmBeing a Boglehead, I look at this way. I can buy brand new Michelin Defenders with 80k mile warranty or I can buy Riken tires for 50% the cost. They last only 40k miles. Because I drive very little I will have used up these tires in 4 years. The Michelin only has 40k on it. Meanwhile I buy another set of brand new Rikens with the latest tire technology that now outperforms the old Michelin Defensders. After 6 years, I can have 2 year Rikens with plenty of tread or I can question whether I want to keep driving on 6 year old Michelins or spend more money.
If the difference were a few bucks, I wouldn't advocate for buying value in tires. We're talking $400 or $600 - 800 for a set of tires installed. Performance and stopping distance is not at issue here as I already explained. It's perception and marketing in my opinion.
Generally, softer tires wear out faster and it takes harder tires to last these longer warranties. I don't know if harder or softer materials age more gracefully or perform better when older. Rubber gets harder and dry out as they age, but supposedly softer tires dry out faster.
Anyway, with 10k/year, math works out one way, but at 5k/year, most all tires will age out before wearing out. I'd rather be on new good or better tires, than the best 6 year old tire with 4/32 wearing down to 2/32 and 40k miles on them, specially on a wet day. Goes without saying, avoid bad or poor tires altogether, but with lower annual mileage, I'd go with good newer tires over better older ones.
https://www.consumerreports.org/cro/tir ... to-useless