As accessories, they can be easily added between the tire and the inner-tube. Some high-end tires have protection built-in, but most tires have none. Anti-puncture linings protect the top of the inner-tube. The ends of the spokes enter the rims, and this lining in the rim-well covers them so that the tube is not damaged. Rim-linings protect the bottom of the inner-tube. Refer to the adjacent image for examples. There are three valve types in use Schrader valves, Presta valves, and Dunlop valves. They are invisible apart from their valves that protrude through the wheel-rims. Inner-tubes are the inflatable parts between the tire and the metal parts of the wheel. Although tubeless bicycle tires exist, they are still quite rare on pushbikes, so this page deals only with tires having inner-tubes. The edges that fit into the wheel rims have wires within the cladding called beading or beads, and various fibers run between the beads to give strength within the cladding. The cladding has a tread, smooth or patterned, depending on its use. The rubber part is called cladding, and it covers the internal structure of the tire. Tires are the rubber outer parts that contact the road's surface. The Presta valve This valve's core cannot be removed but Schwalbe and Bontrager valves have removable ones. Terminology The Schrader valve all of these have removable cores. In addition, there are notes peculiar to the use of tube sealants. This page explains how to repair punctures in bicycle inner tubes, and gives some advice as to the most likely causes.
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