Originally Posted by trader4

I guess you aren't either, since you say you don't know if it applies.
But apparently it does., but it really doesn't change the initial
problem. First, what's most important is what the warranty contract
says. If there is something in there about modifications, the
warranty company believes it applies, then warranty company can
deny the claim and they don't have to "prove" anything at that
point. It's only if you challenge them, take it to arbitration, court, etc.
There, all the facts, issues would be heard and each side would have
to prove their case.

This is the way it works with most of these things where you're
not the one holding the money, etc. It's like saying
a landlord has to prove damages to keep your money. In fact,
what amounts to damages, the facts, etc can be disputed, the
landlord has money and can keep it. If you disagree, then it's
up to you to take them to court, etc. You may or may not win,
but it's what you have to go through.

This thing I'd say depends on what the warranty contract says
with regards to "modifications" and how the company interprets it.
I guess he already has the contract. If he didn't, he could try to
negotiate that an addendum be added that says those wheels
are OK. Even now he could send them an email asking
the question and see what they say. If they say it's OK, he has
the email. But he might just get no answer or they might just
refer him back to the contract, etc.