Ultra compact yet highly efficient mini pump suitable for road bikes and mountain bikes. Unique double chamber design uses both the barrel and shaft to increase the volume of air chamber to pump significantly more air per stroke than the competition (up to 37%). The Airstick can be frame mount included, or slips into your jersey pocket virtually unnoticed. Presta valve only - super small at only 157 mm long - feather light, only 59 g! - max pressure 160 psi