Cycling

Cycle pumps with reversible heads work for Schrader and Presta valves

Reversible bike pump heads can be adjusted to work with both Schrader and Presta valves by flipping the internal components.

The left pedal spindle on a bike is reverse threaded

When installing bike pedals, the left pedal is reverse threaded - turn clockwise to loosen, counterclockwise to tighten.