The Topeak Roadie TT Pump is a Twin Turbo, full metal, pocket sized mini pump. This Topeak pump transfers larger air volume from a bigger diameter outer chamber into a smaller diameter inner chamber to deliver more air at higher pressures to fill tyres 50% faster and easier. Integrated dust cap keeps pump head clean and thumb lock lever ensures an air-tight seal. Topeak is the world leader in developing and producing innovative accessories designed to make cycling more convenient, more accessible and more fun at every level. Topeak Roadie TT Pump Features Full metal construction  Integrated dust cap