Hello
Vibration started in my 96 Legacy and I found that rear tyre has worn 'out
of round'.
Do I have to replace all 4 please?
Gil Cleeton
Gil, search for lots of threads dealing with size differences when
replacing tires. This comes up VERY often. You also don't mention how old
this set of tires is, how much difference there is in CIRCUMFERENCE between
the 4 tires. Subaru's specifications, for what little they are worth, say
you cannot have more than 1/4" difference in circumference. That's a VERY
small amount, and many of us have been in situations that forced us to
either go along with it, costing us a set of tires that were not very old,
or else taking the risk and using a single new one that was more than 1/4"
off from the others. I did this with about 3/8" difference and have no
knowledge of problems because of it (that was probably well over 25,000
miles ago.) This is going to be a judgement call on your part, but only you
can decide whether the cost is worth the risk. Some here would say it is not
much of a risk at 3/8" but others would say it's always a risk. I can't
answer that for sure, but I do believe Subaru's specs are overly tough, and
hard to achieve in the real world. They'd like to have an "out" if you do
have drivetrain problems caused by this, however, and the specs give them
that. Best of luck to you.
