A fibroblast is a type of cell that synthesizes the extracellular matrix and collagen,[1] the structural framework (stroma) for animal tissues, and plays a critical role in wound healing. Fibroblasts are the most common cells of connective tissue in animals.
For example, a 700 x 20 C road tire would be a 20-622; a 700 x 38 hybrid tire would be a 38-622. The width difference between these sizes would make them less-than ideal replacements for one another, but any rim that could fit one of them would work after a fashion with the other.
The industry rule of thumb is that for every 1/2 change in rim width, the tire's section width will correspondingly change by approximately 2/10. For example: a tire in the P205/60R15 size is measured on a 6.0 wide wheel and this size tire has an approved rim width range from 5.5 to 7.5 wide.The tire has a section width of 8.23 (209mm) when mounted on a 6.0 wide wheel.ection Width. A tire's section width (also called cross section width) is the measurement of the tire's width from its inner sidewall to its outer sidewall (excluding any protective ribs, decorations or raised letters) at the widest point.