I wanted to overcome the trade-off between full-sized pumps that are quick and easy to use and mini pumps that are more portable. I’ve turned the whole concept of the bike pump back to front so you don’t push on anything, instead you pull on a handle, just like starting a lawnmower. You start by putting the pump beside the tyre and connecting the hose to the valve. You then hold the pump in place with one foot and pull repeatedly on the handle until the gauge shows the right pressure. Every time you pull on the handle, this turns a shaft which moves two tiny pistons inside two tiny cylinders. The pistons move so fast that you can pump a lot of air both quickly and easily, even at high pressures. It’s like having a massive floor-pump inside a six-inch case!.