I have those hubs and they have been great so far, they even come with a grease zert, for what I don't know, the grease just would float around inside.
I'm thinking they meant 4 on 4 trailer rims... 4"x4" square bolt pattern.
great place to get trailer rims at an affordable price... http://www.etrailer.com/dept-pg-Tire...heel_Only.aspx they ship fast! I just bought 2 of the 8x5-3/8" rims and valve stems for $46 bucks shipped.
tires I went on ebay and found some 21x7-8 ones (hard to find) I didn't think they made them but they do. I got them today and the tread is pretty good, and they are 4ply. http://www.ebay.com/itm/21x7-8-Front...ht_2376wt_1397
Ball joints are good temp fixes as MSM stated, but in the long run you'll want to upgrade to something else.
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T.J.
Yerfdog Spiderbox, Uni Type air filter with 6" intake, 130 jet, Orange no-rev limit cdi, Red coil, iridium plug, 1500rpm clutch springs, 1500rpm contra spring, 13g sliders, 22" rears, 21" fronts, aftermarket reverse installed, and Trailtech Vapor.
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