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Bicycle Tubes - Contec

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Bicycle Tubes - Contec

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Bike inner tubes, buy cheap at velondo.ie

Bicycle inner tubes are light, feel a bit mealy, are usually greyish black, smell a bit funny and eke out a shadowy existence, because they are usually hidden under a bicycle cover or in a box. If you see the bicycle tube, it is usually not a good sign, because normally you only see a bicycle tube when it breaks down.

Dunlop and Michelin invented the tyre for us

John Boyd Dunlop is considered the inventor of the bicycle inner tube. If the stories are to be believed, he invented the inner tube because he was bothered by the noise his son made when he rode the metal tyres of his tricycle down the road. A year after the Scotsman Dunlop, in 1889, Édouard Michelin also invented a replaceable, air-filled inner tube. Michelin and Dunlop are still the epitome of quality tyres and inner tubes today.

Butyl vs. rubber

Bicycle inner tubes are usually made of butyl or rubber or latex.

Butyl inner tubes have the advantage that they are not as sensitive to heat, do not lose air as quickly and are cheap to buy. Butyl inner tubes are heavier than rubber inner tubes. Bicycle inner tubes made of latex or rubber are lighter than butyl inner tubes, have a lower rolling resistance, but are not as pressure-stable as butyl inner tubes. The mealy exterior of bicycle inner tubes comes from the talcum powder with which the tubes are dusted. The talc is to prevent the tubes from sticking to the bicycle shell or the rim tape. The tape on the rim protects the inner tube from damage, because it covers the nipples and nipple holes that are present on the rim.

Tubular tyres are especially suitable for road bikes

Professional racing bikes are often equipped with so-called tubular tyres. In these tubular tyres, the tube and the casing form a sewn unit. Tubular tyres can withstand extremely high tyre pressure. This makes them an ideal component for cycle racing, where the lowest possible rolling resistance is important. Road bike inner tubes are usually made of butyl. However, Michelin also offers an ultra-light road bike inner tube made of latex. Did you know that a road bike tyre has to withstand four times the air pressure of a car tyre? Probably not. In view of this load, it becomes clear that you should not skimp on the quality of an inner tube, because only an inner tube that keeps tight for as long as possible and does not lose air promises riding fun, low rolling resistance and puncture resistance.

So-called flat feet on the bike occur because sharp objects such as shards or nails penetrate through the bicycle shell into the bicycle tube. It is actually not very common to jam the edge of the rim into the inner tube on a road bike. You would have to ride over extreme potholes or kerbs to do that.

Latex inner tubes are much more robust than butyl inner tubes thanks to their material properties

In stitch tests carried out by both manufacturers and independent testing institutions, it has been found that latex bicycle inner tubes are far more robust and resistant than butyl inner tubes. The reason for this lies in the material properties of latex. This is because latex is extremely pliable and moulds itself to the pointed object. While pointed objects that penetrate the bicycle cover immediately cause a flat tire on bicycle inner tubes made of butyl, foreign objects do not necessarily cause a flat tire on a latex inner tube. If the foreign body is removed in time, there is a realistic chance that the inner tube will not need to be replaced or patched. Tyres with puncture protection and latex bicycle inner tubes are of course an optimal unit. Here, drawing pins and broken glass hardly have a chance to do any damage.

The bicycle inner tube influences the rolling resistance

Not only the bicycle shell but also the bicycle tube has an influence on the rolling resistance and thus on the smooth running of the bicycle. As far as rolling resistance is concerned, light inner tubes are - oh wonder - ahead. However, whether the average person really feels a difference in rolling resistance and speed with a weight difference of 20 - 50 g, we leave undecided. For competitive athletes and ambitious cyclists, however, the lowest possible rolling resistance is important. Tests have shown that not only the weight of the inner tube but also the material influences the rolling resistance. Here, too, the latex tube came out on top. Although it was heavier than the comparable butyl inner tubes, it had significantly lower rolling resistance values.

The air retention capacity influences the choice of bicycle inner tube

Another important criterion when choosing an inner tube is its air retention capacity. Bicycle inner tubes made of butyl retain air longer than PU inner tubes. Bicycle inner tubes made of latex had to be pumped up most often. For all materials, thin tubes hold the air less well than thick tubes, but are lighter. Overall, it can be said that bicycle inner tubes made of butyl are the most recommended. Even 50 g inner tubes hold the air longer than latex inner tubes and only have a worse rolling resistance that is not measurable for the layman. Bicycle inner tubes made of latex are ideal for competition and cross-country athletes. However, the fact that they have to be re-inflated every 2 days at the latest is annoying and makes them less useful for everyday use.

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