Support Leg Bearings for Semi-Trailers (Landing Gear Bearings)

Support leg bearings — also known as landing gear bearings or trailer support bearings — are critical components used in semi-trailers, truck trailers, and heavy transport equipment. These bearings ensure smooth lifting and lowering of the landing gear, even under high load, vibration and harsh outdoor conditions.

What these bearings are used for

Support leg bearings are installed in the landing gear mechanism of semi-trailers. Their role is to handle:

Axial and radial loads during lifting
Continuous vibration during road operation
High static load when the trailer is parked
Outdoor exposure, moisture, dust and contamination

Common types of bearings for landing gear

The most frequently used bearing types in trailer support legs include:

Tapered roller bearings – high strength and long service life
Needle roller bearings – compact size, high load capacity
Thrust ball bearings – for axial loads in lifting direction
Plain bearings / bushings – simple and reliable for slow-speed use

Typical dimensions and specifications

Landing gear bearings are often supplied in heavy-duty versions with features such as:

Reinforced cages
C3/C4 clearance
Metal shields or seals (ZZ, 2RS)
Corrosion-resistant coatings

Applications

These bearings are commonly used in:

Semi-trailers
Three-axle and mega trailers
Container chassis
Refrigerated trailers
Flatbed and low-bed trailers
Construction and agricultural trailers

Why high-quality landing gear bearings matter

Support leg bearings are exposed to heavy loads and contamination. Using high-quality bearings prevents:

Landing gear jamming
Uneven lifting
Excessive wear of gears and shafts
Risk of trailer collapse during parking

Worldwide availability

We source and supply support leg bearings for all major trailer manufacturers. High-load versions, special clearances, and branded alternatives are available on request. Delivery is possible worldwide.

Need help identifying the right bearing?

Send us the bearing number, dimensions, photos, or the trailer model. We will identify the correct landing gear bearing and provide a quotation with delivery time.