Precision bearings, on the other hand, are highly accurate in terms of material quality, consistency of finish and diameter, and repeatability of tolerance levels.
Two general classes of bearings exist: commodity and precision.
Main bearings
There are 8mm bearings and 10mm bearings. Unless the truck says that it needs 10mm bearings (ex. Bear 1052 trucks, the 10 is for the bearings and 52 for baseplate angle) it will use 8mm bearings. Most precision trucks use 10 mm bearings.
Cartridge bearings offer advantages over traditional loose ball bearings in bicycle components because they are sealed units that require less maintenance, provide smoother operation, and are easier to install and replace.
Some advantages of using plastic bearings are that it saves money, it has corrosion and chemical resistance, designed to maintain a low COF, no messy lubrication and resistance to dirt.
to reduce friction and make the object move smoother.
It is heavy and might damage bearings
Sealed cartridge bearings in bicycle components offer advantages such as increased durability, reduced maintenance needs, smoother performance, and better protection against dirt and moisture.
its clarity and precision. its relative intolerance of error
Advantages: Stores more information with greater precision. Disadvantages: Takes up twice the amount of memory.
It is the fastest in the world. And it's shiny!
Cartridge bearings and sealed bearings both offer good performance and durability, but there are some differences between them. Cartridge bearings are typically more precise and have higher load capacities, making them better for high-performance applications. Sealed bearings, on the other hand, are easier to maintain and are more cost-effective. Overall, cartridge bearings are usually preferred for demanding applications where precision and performance are crucial, while sealed bearings are more commonly used in everyday applications where ease of maintenance is important.