The topeak race rocket hpx pump is the longest and slimmest version in the racerocket series this all aluminum pump fills high pressure road tires fast this elegant mini pump features an all aluminum body head and pump handle and is designed with a narrow barrel diameter and longer stroke to handle higher pressures with ease an extendable hose with smarthead threadlock fills presta and schrader valves with ease and helps take stress off the valve stem when filling the tire