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by to11mtm 23 days ago
I'll give a fun one.

On a lot (really most) of 4WD/AWD drive vehicles, but especially those with 'full-time' (cries in Subaru), if you need to replace one tire 20k miles in (i.e. due to a road hazard etc) you then have to replace the entire set to avoid damaging the drivetrain.

I suppose in theory you could try to 'trust' shops to properly pro-rate such scenarios, however I'm skeptical that it could be implemented in a trustworthy way without being more trouble than it's worth.

2 comments

> if you need to replace one tire 20k miles in (i.e. due to a road hazard etc) you then have to replace the entire set to avoid damaging the drivetrain

Re-sell them to other vehicle operators that don’t need to worry about that to utilize the remaining life? Would be easier if we had more 3 wheelers but at least 2 tires can be sold as a set. And not extremely difficult to match sets of 3 odds together with another 3 odds if you have some infrastructure to get some network effects.

Cuz i’m sure the shop is doing that.

why do people think this ? you just shave a new tire down to the diameter of the existing tires.
Because while this is 100% a thing and anyone who has taken a vehicle to the track knows this, Les Schwab or Discount Tire aren't doing this for you.
Yeah I'll admit I've never seen a shop I've gone to offer that as a service; the closest I've gotten is getting the shop's extended warranty on the tires, and then they'll pro-rate the remaining tires on replacement. Still had to pay labor tho.

What kind of tire shops should I look for? Smaller ones or specialty ones?

Independent tire shops without known brands and/or racing-oriented stores.