700c clinchers are fitted to ERTO 622 clincher rims with hooked walls.
Most are open clinchers, where there is a seperate innertube and rim tape.
Tufo, and some others, make closed clinchers which have all parts inside making fitting easy.
They need no tools for fitting but repair is limited to sealant or replacement.
TEW (Tufo Equivalent Weight) is the weight of a Tufo clincher less the weight of a normal innertube and rim tape.