30" Mudlites won't hurt anything. My wife ran them for years on completely stock bike with no problems, I ran all wide 30" Mudlites with no issues. Pulled them easier than most 28's.
Oh, and swamplites are anything but light. Miss leading name there... And they may be an ok tire (for a few), but there are so many other tires out there that out perform them that they really aren't even worth considering.
Of course this is just my opinion. :smilietwocents: