In order to achieve optimally high tyre pressure in the minimum amount of time, the compact Horizons bicycle pump utilises a proven two-way technology. An integrated adaptor securing the valve additionally guarantees that the fragile Presta valves cannot be damaged if over zealously inflated. To remove the valve adaptor, the user simply needs to flex the end of the retainer cap to one side, allowing the universal Presta/Schrader adaptor to be accessed from its neatly stowed position.