The intervertebral foramen (also called neural foramina, and often abbreviated as IV foramina or IVF), is a foramen between two spinal vertebrae. Cervical, thoracic, and lumbar vertebrae all have intervertebral foramina. The foramina, or openings, are present between every pair of vertebrae in these areas. A number of structures pass through the foramen. These are the root of each spinal nerve, dorsal root ganglion, the spinal artery of the segmental artery, communicating veins between the internal and external plexuses, recurrent meningeal (sinu-vertebral) nerves, and transforaminal ligaments.
The diameter of the rim has to match the diameter of the tire. In general, the diameter can be anywhere from 14 to 18 inches. However, this measurement can change if the wheel has an aftermarket rim. Larger diameter rims provide improved handling, but they also cost more (much like wider tires).
Tire width for a wheel/rim size chart. Rim width and tire width are two closely related sizes. Flexible tire sidewalls alow a single tire size to be mounted on a rim of various widths. There is a rim width range for every tire size, but on the other side, there is a tire width range for every single rim size. When replacing a rim or tire with a wider one you could put a question in two different ways: