For the past several decades, higher-end bicycles have utilized quick-release axles in their wheel hubs, in order to facilitate fast and easy wheel removal. With the recent movement towards disc ...

After learning about the lever, wheel and axle, pulley, inclined plane, wedge and screw, the students designed a future Hilltop playground, one that included examples of each simple machine studied.

The UDH was a great addition to cycling; however, direct-mount derailleurs left indoor trainers behind. Not anymore, thanks to Saris.