What is a TKP (Traditional Kingpin) ?
TKP (traditional kingpin): Mostly used on street setups, these trucks are less turneble, but at the same time quicker in their response. They are also lighter, so it is easier to do tricks with them. Next thing is that these trucks are usually made with grinding in mind. You can find TKP trucks, most likely on skateboards or cruisers.
Kingpin
The kingpin is the big bolt that goes through the bushings and holds the skate truck parts together. Most kingpins are solid but there are also hollow kingpins. The are lighter but do not compromise the strength or durability.
Baseplate
The baseplate is the base of the truck. This is the part that attaches to the skateboard deck with four bolts. The Kingpin and pivot cup are attached to the baseplate.
Washers
The washers are the metal rings on the bushings. These washers distribute the load on the bushings and make sure the board returns to its center position after turning.
Pivot cup
The pivot cup is the small cup in the trucks baseplate. It makes sure the truck turns effectively at the baseplates intended angle.
Bushings
The thick soft urethane rings are called bushings. They control the way the board turns and pivots.
Hanger
The second main part of the skate truck is called the hanger. The triangular part rests in the pivot cup and is attached to the bushings and baseplate with the kingpin. The hanger holds the axle and is the part that you can grind on.
Axle
The axle passes through the hanger and is made out of titanium or steel. The bearings and wheels turn on the axle.
Axle nut
The axle nut is there to keep the wheels from falling off the axle.
Kingpin nut
The kingpin nut is the nut that holds the truck together. Tightening or loosening the nut influences the way the board steers and how the bushings react to input.
Speed rings
Speed rings are small washers that go on the axles, one in front and one behind the wheel. It prevents the bearings from wearing out against the axle nut or hanger.
Mounting holes
The 4 holes on the baseplate, so you can mount the truck to your board.