Trust me, trailer bearings or tires are not something that you want to cheap out on!!!
Results of either one failing at high speeds can have horrible catastrophic consequences...ask anyone who has experienced one!
Tires can tear up all kinds of things when they come apart, and bearings overheating to failure can weld themselves to a spindle destroying it and the hub and leave you on the side of road stranded!
eTrailer sells some premium bearings, and some Timken bearings at decent prices.
Northern Tool sells some nice Ultra-Tow hub kits with bearings that are greaseable from the outside of the hub via a zerk fitting similar to the EZ Lube spindles or Dexter Axles have.
I have two trailers with the zerk grease fittings on the end of the spindles and they work really great!
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Supporting Vendor and Moderator of LOST05 Jeep Liberty CRD Limited
Ironman Springs/Bilstein/Shocks
Yeti StgIV Hot Tune
Week's BatteryTray
No FCV/EGR
Samcos/ProVent
SunCoast/Transgo
Carter Intank-pmp
2mic.Sec.Fuel Filter
Flowmaster/NO CAT
V6Airbox/noVH
GM11 Bld.fan/HDClutch
IronrockArms/wwdieselMount98 Dodge Cummins 24 Valve