English to Portuguese Tech/Engineering Sports / Fitness / Recreation bicicletas

New shift ramp designs provide the fastest, smoothest shifts by HYPERGLIDE+


The ramps help to catch the side plates of the chain to lift it up when shifting to a larger sprocket. This worked so well on rear sprockets that it was later applied to chainwheels as well. Since chainwheels do their shifting with the tight segment of the chain, they are subject to more stress in shifting. In addition, chainrings are generally made of aluminum, which is softer than the hardened steel used on rear sprockets. Ramps on chainrings would get worn down easily and loose their effectiveness.