Agree with Roy. Also if you get caught in an O.P.P. blitz they will park you with an LT tire on a trailer. (if you get a hard nose). I have an Lt as a spare, only taking my chances if I have to use it to get home!
As for Princess Auto, be cautious with the rims/ tires you buy. Likely the same Carlisle tires, however the rims I purchased from P.A. with tires already installed had runout that shook the boat too bad. Went to my local tire guy (keeping the money I was spending "local") and he advised me of my problem. (the rims not accurate enough). All said and done, he set me up and I was out the door within $8 per tire, and he balanced and installed them. The balancing is not necessary, however you can shake and rattle alot of electronics on the way to the lake.
Sorry for the ramble but just wanted to share with ya!
Jeff