Hyperglide

Hyperglide is the name given by cycling component manufacturer Shimano to a sprocket design in their bicycle derailleur tooth cassette systems.

[1] It varies gear tooth profiles, and/or pins along the faces of freewheel or cassette sprockets, or between the chainrings in a crankset, to ease shifting between them.

[2] The Hyperglide ramps, along with laterally floating derailleur jockey wheels, allows for enough "slop" in the system to make indexed shifting reliable, despite variations in shift cable adjustment and manufacturing or assembly tolerances.

The individual sprockets on a Hyperglide cassette or freewheel are designed specifically to work with their neighbours.

However, some mixing and matching is possible for a custom gear range, as long as all the sprockets' ramps are compatible.