I'm going to pick up my 2004 Hurricane 217 SD next weekend!!!! If it's ready hopefully. The owner says there isn't a spare for the Trail Master trailer duel axel that came with the boat. It has mag wheels on it and the guy doesn't know what size they are?? And i don't think he knows how to look for it. So i'm wondering what size to buy for the spare tire and wheel? I'm not gonna buy a mag for the spare tho. Thanks