Some bicycle components wear out, but you could do a lot in order to prolong their lifespan and at the same time, improve their performance.
Chain: Keep your chain clean by wiping it off after every ride. Use an appropriate lubricant depending on the conditions in which you are riding. The chain should be replaced after approximately 1500 km to prevent premature wear of the sprocket. You can also use a special chain wear measuring tool.
Cables: They must always be clean, dry and lubricated to ensure good shifting. When you buy a new bicycle, readjustment/retension of the cables might be needed after some riding.
Cranks, sprockets and bottom bracket: The lifespan of these components depends on the maintenance and riding style. They should be replaced when their performance deteriorates. Note that if you replace the sprockets, you should also replace the chain.
Brake pads: Pads should be free of dirt. Dirty pads wear out faster and stop much worse. Dirty or greasy pads are often the source of unpleasant noises. Keep the pads and discs of your bicycle from getting greasy.
Pedals: The threads of the pedals should be lubricated well before mounting them on the bicycle. Otherwise, they might cause squeaking noises or subsequently become difficult to unscrew. Keep in mind the left pedal has a reverse thread!
Grips: Note that the rubber of the grips could wear out or be damaged by UV radiation. If the grips get porous or slippery, it’s time to replace them.
Rims/spokes: Check your rims and spokes from time to time for radial or axial deviation/runout. If you notice any deviation in your tyres/rims, contact a qualified repair shop.
Internal and external tyres: Depending on their intended use, external tyres should always have a proper tread depth. If you notice any damage of the walls of the tyre, check how big the damage is. If necessary, replace it with a new tyre suitable for your bicycle. If you have a flat tyre, you could replace it or patch it. Before mounting, check for any thorns left on the external tyre. Always pump within the limits set by the tyre manufacturer.
Paint and anodizing: We use different methods of painting, and some parts might be anodized. Please don’t use any solvents or industrial cleaners for your bicycle. You could use special bicycle cleaning products but usually, lukewarm water with washing liquid and an old cloth would do. Water- and steam-pressure washing could also damage the paint and bearings. If the bicycle is exposed to direct sunlight, this might discolour/bleach the paint because of UV radiation.