You extend the pump again, the check valve opens to refill the chamber with air and you repeat the process. That pressure increases until it exceeds that inside the tyre.Īt this point, a second one-way valve will allow air to flow from the pressurised pump chamber into the tyre. On a pump’s downstroke, a check valve (that allows air flow in one direction) seals the piston chamber, resulting in air being pressurised as the pump is compressed. This ‘overpressure’ forces air into the tyre, increasing its pressure too.Ī pump is just a manually actuated piston. The operating principle is simple you increase the pressure inside the pump until it exceeds that inside the tyre.
Nick Clark / Our MediaĪ pump gets the air into your tyre. STUDENT? - Then having your bike repaired with a 20% discount is perfect for you! Ask for the conditions in the store.Some pumps feature rubberised handles for improved grip. This way you ensure that you are seen by everyone after dark! Or bicycle lights that are easy to attach to your bicycle handlebar/front carrier.
A strong bicycle lock, for example, prevents a stranger from running off with your bicycle. Some accessories make the ride just that little bit easier. You can decide for yourself whether you want to equip your bike with affordable parts or more expensive and higher quality ones.ĪCCESSORIES - Get ready to explore Rotterdam on your bike. SMALL LOCAL BIKE SHOP - Because we are a small bicycle shop, we offer you the best prices for all parts and repairs. We are the go-to bicycle shop in the center of Rotterdam! It doesn't matter if it's the newest Gazelle or a bike from the early 1920s. Usually, your bike is ready for use within 1 day.ĪLL TYPES OF BIKES † We repair every type of bicycle. BIKE BROKEN? - Do you have a flat tire, a damaged part or do you have other problems with your bike? Centrum Bikes Rotterdam has experienced bicycle mechanics who can solve any problem.
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