Planet Bike Air Smith ALX mini bike pump Smooth, lightweight alloy or composite barrel Retractable hose protects tire valve and allows for a powerful and comfortable pumping position Large rotating valve head and hose makes it easy to use Stow-a-way adaptor converts Airsmith to Presta mode. It also gives you the flexibility to use at gas stations and with other air compressors Using adaptor head with compressor is helpful if you have tubeless tires and need to reset the bead