Engineers have realised, that oversized pulley wheels can turn more efficiently, reducing slack in the chain of a bicycle drivetrain. The HollowCage weighs only 71g, which is much lighter than a conventional road bike rear derailleur from SRAM, Shimano or Campagnolo. How much greater is its efficiency than a conventional premium rear derailleur cage? What they will confirm, is that the HollowCage derailleur cage and pulley wheels, run two decibels quieter, compared to any rival component. The HollowCage derailleur cage retails for R10 000.

Source: News 24 July 20, 2021 07:52 UTC