Rim (wheel)

[1] It makes up the outer circular design of the wheel on which the inside edge of the tire is mounted on vehicles such as automobiles.

[3] In cross-section, the rim is deep in the center and shallow at the outer edges, thus forming a "U" shape that supports the bead of the tire casing.

[4] In the 1st millennium BC, an iron rim was introduced around the wooden wheels of chariots to improve longevity on rough surfaces.

The sleeve is then shaped to obtain the rims on each side with a radially inner cylindrical wall in the zone of the outer seat and with a radially outer frustoconical wall inclined at an angle corresponding to the standard inclination of the rim seats.

The radial outer surface of the wheel disk has a cylindrical geometry to fit inside the rim.

The distance between the centerline of the rim and the mounting plane of the wheel is called the "offset" and can be positive, negative, or zero.

Cutaway diagram of a rim and tire from an ATV
Cross section of a bicycle rim
A wooden bicycle rim with tubular tire
Scratched rim on a one-piece alloy wheel. The black residue remains from where the tire was seated on the "safety profile" rim.
Thomas B. Jeffery 's 1882 clincher rim patent
Damage to the rim can cause vibration and cause a tubeless tire to fail to hold pressure