Bearings & Seals
TRAILER WHEEL BEARINGS, SEALS & BEARING KITS
Keep your trailer wheels turning smoothly with our range of trailer bearings, hub seals, and bearing kits. We stock common NZ trailer bearing sizes including imperial and metric options to suit Trojan, CM, and other major trailer brands. Regular bearing maintenance is essential for safe towing — browse our full selection below.
Not sure which bearings you need? Contact our team for expert advice.
- How to Check and Choose the Right Trailer Wheel Bearings Which bearing suits your axle rating, and how to spot a worn one.
- How to Replace Trailer Wheel Bearings Step-by-Step The full job, including marine trailers.
Bearings & Seals — Frequently Asked Questions
How do I know which trailer bearings I need?
Bearings are matched to your axle and hub, not to the trailer brand or the badge on the drawbar. The most reliable method is to pull the hub apart and read the numbers stamped on the existing bearing and seal. If that isn't practical, tell us your axle size, hub type and the trailer's weight rating and we can identify the right kit.
How often should trailer bearings be repacked or replaced?
As a general guide, repack with grease annually or every 10,000km, whichever comes first. Boat trailers that get regularly submerged need far more frequent attention, and many owners repack after every few launches. Replace rather than repack if you find pitting, discolouration, roughness when spun by hand, or any play in the hub.
What is different about marine bearings and seals?
Boat trailer hubs are repeatedly dunked in cold water while hot, which draws water past a standard seal. Marine-rated seals (such as triple-lip types) and marine grease are designed to resist that water ingress. If you launch a boat, fit marine-spec seals as standard seals will fail early.
Do I need a new seal every time I replace bearings?
Yes. Seals are cheap, they are deformed on removal, and a reused seal is the most common cause of a repeat bearing failure. Our bearing kits note whether a seal is included, as some are supplied excluding the seal.
What are the warning signs of a failing wheel bearing?
A rumbling or grinding noise that changes with speed, a hub that is noticeably hotter than the others after a run, visible grease thrown onto the inside of the wheel, or any wheel wobble when rocked by hand. A failed bearing can seize the wheel entirely, so investigate early.
