On Fri, 7 Jun 2013 17:21:01 -0700 (PDT), True North wrote:

I have the 17" wheels also, didn't see the need to buy the pkg which included the big uns'.
My Shorelandr boat trailer has 13" wheels

That'll make a difference also. I had 15" wheels on the trailer.

John H.
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Hope you're having a great day!