I swapped out the tires that came on my trailer after they cracked. I got the tires balanced then, because the ones that came on the trailer were definitely not balanced.
I also went through a set of caps, Make sure you don't over tighten, or under tighten. If you over tighten, you will strip the plastic threads, if you under tighten, the rubber seal will let some oil seep through. You can get the clear ones to monitor the oil from the expediter
http://www.expediter.com/pdf%20folder/B ... er/B14.pdf
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2011 SL242 5.7 VP GXi - 320 HP Dual Prop
