For the same reasons that a dealer usually won't mount a car tire for you, I was asking IF they could revoke a warranty based on the bike having been modded in this way.
I myself am not concerned about a car tire as I've run one with my Valk Interstate. It's more a legalise question on IF the dealer can do that.
I couldn't agree with your statement more that a car tire "shouldn't" affect a warranty.
Thanks,