The Topeak Roadie TT Twin Turbo is a high-quality, all-metal mini pump suitable for road bikes. Both the air chamber, the clamp on the pump head and the handle are made of aluminium. This makes this pump not only very durable, but also very light. Furthermore, the pump head includes a rubber dust cap, which prevents dirt from getting into the pump. Twin Turbo Thanks to Twin Turbo technology, this pump performs in its very own class! Because the Roadie TT uses two different air chambers, it is possible to move a lot of air under high pressure. This is because a large volume of air is forced through the largest and outer air chamber into an internal air chamber with a smaller diameter. This builds up pressure and allows more air to be moved at a higher pressure per stroke. According to Topeak, this makes it 50% easier to inflate your tyres.