Complete trailer product series for one-stop sourcing
Trailer Parts Manufacturer — Axles, Hubs, Brakes & Suspension
Trans Power (TP) supplies the complete trailer running gear: full and half axles, trailer hub units, brake systems, and suspension systems with accessories. Rated 0.75 t to 6 t per axle, covering everything from a light utility trailer to a triple-axle plant trailer.
Fitted to camping and travel trailers, boat and yacht trailers, RVs, agricultural trailers and utility trailers. Our trailer parts are in service across North America, Europe and Australia — three markets with very different regulations and very different corrosion environments.
Because trailer builders specify rather than order from a catalogue, we customise: material, machining process, rust-prevention treatment and heat treatment can all be set to your requirement. That last one matters more than anything else if your trailers go in salt water.
0.75 t to 6 t Per Axle
The full light-to-medium range from one supplier — you can source a 750 kg box trailer axle and a 6 t plant trailer axle on the same order.
Complete Running Gear
Axle, hub unit, brake system and suspension from one place. Fewer suppliers to chase when a build is waiting on parts.
Rust Prevention Is Specifiable
Boat and yacht trailers get dunked in salt water. We set the rust-prevention process to the application rather than applying one finish to everything.
Built to Your Drawing
Material, machining process, heat treatment and finish are all customisable. Trailer builders specify — we are set up for that, not just for catalogue picking.
NA, Europe & Australia
In service in all three. Regulations and hitch/brake conventions differ; tell us the destination market and we will flag what changes.
China + Thailand Plants
Zhejiang base plus our Thailand factory (2023). Choose the origin that suits your tariff position.
Trailer Product Range
Four systems plus wheel-end components. Most customers start with the axle and build outward — tell us the rated load, the trailer type and the destination market and we will put a specification together.
Full Axle & Half Axle
Braked and unbraked, 0.75 t–6 t. Full axle or half (stub) axle depending on your chassis design.★ 5 击 / 299 曝
Trailer Hub Unit
Sealed hub units and hub-and-drum assemblies. Bolt pattern to your specification.
Trailer Brake System
Mechanical, hydraulic override and electric brake options depending on destination market rules.2 击 / 49 曝
Suspension System & Accessories
Leaf spring and rubber torsion suspension, plus hangers, shackles, U-bolts and fittings.
605124 Trailer Wheel Bearing Kits
Complete wheel bearing kits for caravan and trailer wheels, gearboxes and specialist applications.163 曝 / 排 6.9
Trailer Bearings
Tapered roller sets and sealed bearings for trailer wheel ends.101 曝 / 排 14.2
Also available as subcategories: Axle Series · Brake System · Trailer Hub Unit · Suspension System & Accessories
Choosing a Trailer Axle by Load Rating
Trailer running gear is specified by rated load per axle, not by part number. Our range runs from 0.75 t to 6 t. Find your rating, then tell us the trailer type and destination market — brake requirements above a given weight differ by country.
| Rated Load | Typical Trailer | Braking | Axle Type |
|---|---|---|---|
| 0.75 t | Light box, luggage and small utility trailers | Usually unbraked | Stub / half axle common |
| 1.0 – 1.4 t | Small camping trailers, single-axle boat trailers | Braked or unbraked depending on market rules | Full or half axle |
| 1.6 – 2.0 t | Caravans, mid-size boat trailers, car-transporter singles | Braked | Full axle, often with override brakes |
| 2.5 – 3.5 t | Twin-axle caravans, plant and machinery trailers | Braked | Full axle, tandem sets |
| 4.0 – 6.0 t | Heavy plant trailers, agricultural trailers, tandem and tri-axle | Braked | Full axle, heavy-duty hub and drum |
Braking thresholds and hitch types are set by national regulation and differ between North America, the EU and Australia. Tell us where the trailers will be registered and we will confirm what the axle needs to comply with.
Trailer Hub Types — What to Confirm Before Ordering
Trailer hubs are not classified by generation the way car hub bearings are. They are defined by bolt pattern, whether the drum is integral, and the bearing pair inside. Six things to pin down — get these right and the rest is straightforward.
Not sure of your bolt pattern? Measure across the studs — on an even-stud hub, centre to centre of two opposite studs; on a 5-stud hub, from the centre of one stud to the far edge of the hole two along. Or send a photo with a ruler in it and we will identify it.
Trailer Types We Supply
Corrosion Protection for Immersion Duty
A boat trailer is the only trailer designed to be driven into water. Hot wheel bearings meet cold — often salt — water, the hub cools, pressure drops and water is pulled past the seal. Then the trailer sits on a driveway for three weeks with that water inside. That is the failure mechanism, and no amount of bearing quality fixes it if the corrosion protection and sealing are wrong.
We treat rust prevention as a specification, not a standard finish. Tell us whether the trailers go in fresh or salt water, how often, and whether the customer will fit bearing protectors — and we will set the treatment and the seal arrangement to match.
The same applies to agricultural trailers standing in a yard through winter, and to coastal markets generally. Australia and the US Gulf and Atlantic coasts are the obvious cases.
Customisation & Quality
Trailer Builders Specify — So We Build to Spec
Four things are customisable on our trailer running gear, and trailer manufacturers routinely change all four: material, machining process, rust-prevention treatment and heat treatment. Send a drawing or a sample and we will confirm what we can hold.
Trans Power was founded in 1999, with a production base in Zhejiang, a 2,500 m² logistics centre in Shanghai and, since 2023, our own factory in Thailand. For a trailer builder running a production line, the two-site setup means supply does not hinge on one location.
Cross-reference numbers from SKF, NSK, FAG, TIMKEN and other brands are listed across our bearing catalogue for identification purposes, so wheel-end components can be matched to what you stock.
China & Thailand factories → · Heavy-duty trailer hub units for North America →
Certifications
TP products are manufactured under ISO 9001 and IATF 16949 quality systems, with third-party verification by Intertek. Certificate copies for your market are available on request.
Trailer Parts FAQ
What load ratings do your trailer axles cover?
Do you supply the complete running gear or just parts?
What is the difference between a full axle and a half axle?
Can you supply trailer parts for boat trailers used in salt water?
How do I identify my trailer hub bolt pattern?
Do your trailer parts meet regulations in my market?
Can you build to our drawing?
What is your MOQ for trailer parts?
Applications
TP trailer running gear is in service across North America, Europe and Australia, on everything from 750 kg box trailers to 6 t tandem plant trailers.
Related product ranges:
Truck Bearings & Hub Units ·
Agricultural Bearings ·
Wheel Bearings & Kits ·
Spare Parts
Tell Us What You Are Building
Rated load, trailer type, destination market, and whether it goes in water. That is enough for us to put a running gear specification together — axle, hub, brakes and suspension — and come back within one working day with pricing and MOQ. Drawings welcome.
Get a Quote info@tp-sh.com