The bike pump is the most important accessory that no cyclist should travel without. It allows, to some extent, to ensure against unforeseen situations that arise on the road. By design, they are conventionally divided into manual and floor-mounted (single-piston, two-piston). Pneumatic CO2 Pump - very compact, useful for athletes. Inflates thanks to a gas cylinder. Portable Hand Pump. For mountain bikes, a pressure gauge is desirable, but not required. Pumping up to the correct pressure is very important for the road bike, so it is essential. Very comfortable that fits easily into a subframe bag, lightweight, cheap.