Rolling bearings for trailer axles have been a core competence of FLT in the commercial vehicle segment for a long time. Such wheel hub bearings are designed either as symmetric or asymmetric pair per stub axle or as hub unit with single-part outer ring. The unique feature is in all cases the high load specification and reliability in combination with reduced maintenance or even maintenance-free design. The bearing type selected here is the tapered roller bearing with precisely defined raceway profiling such as crowning, logarithmic shape or others. Hub units contain additionally specially developed seals for protection against dust, dirt, sand and (salty) water, and they are easily installed.