Wheel bearing / spindle and tire sizes

Hello all,

I am picking up a 99 2370 next week that I have not seen in person yet and wanted to know if anyone knew what size spindle the trailer will have since I want to repack and possibly replace the bearings before the 500 mile journey home. If anyone happen to knew the tire sizes on this trailer that would be great as well so I could pick up a spare and bring with me.

Thanks!