TBU design also offers many options in regard to specific sizes and technical features like grease fill, sealing systems, and more. The designs are even tailored for specific vehicle types. These include high-speed and very high-speed trains, locomotives with speeds up to 120 km/h, as well as for American, Chinese, and Russian freight cars. Certain TBU designs can also be used in mass transit vehicles, like metro cars, light rail vehicles, and tram cars up to the same speeds.

Cylindrical roller bearings units (CRUs) are another popular option for train wheelset applications – particular in European freight vehicles. They feature high radial load capacity and low friction, making them ideal for high-speed and heavy-load operations. Like tapered roller bearings, cylindrical roller bearings can help to reduce wear and heat generation, as well as improve efficiency and reliability.