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.
Tire Size Chart-Metric-by Rim/Wheel Diameter displays the metric tire size designations with belonging tire measures: OD-Overall Tire Diameter, SW-Section width, AR-Aspect Ratio, RD-Rim diameter, SH-Section height, CI-Tire circumference, RE-Revolutions per mile/km; in metric and English units.