Tire choice

de bandThe tire is very important for ride comfort and wheel behavior. By right tire choice for the bikes driving pleasure can be increased significantly. In the selection of the appropriate band, the following properties also play a role:

  • The grip
  • the suspension
  • the rolling resistance
  • The puncture resistance

In the selection of the correct tire mainly the conditions of use are of interest, and the comfort that the cyclist wishes.

Bike type Diameter Width Profile Pressure
City bike 622 of 590 28 à 40 mm No light or profile in the longitudinal direction 4 à 6 bar
Randonneur
Trackingbike
622 25 à 40 mm Greatly depending on the application. On the road no or light longitudinal profile on the side. In the terrain studded profile 4 à 6 bar
road bike 622 20 à 28 mm No or light longitudinal profile on the side
Mountainbike 559 44 of 47mm Studded Profile for of the road Many mountain bikes are sold for use on the road. It is wise to replace the tire with a smooth-running road tire with low profile

Used tire type on different types of bikes.

The road surface determines the profile to be selected.

de bandOnly if people cycle on dirt roads, positive studs like those found on mountain bikes are useful. Negative transverse ridges really have no function.

If cycling is on paved roads can be fitted best a semi-slick tire. This is a tire with smooth tread in the middle for low rolling resistance and side profile for a slightly better grip in the corners.

The tire pressure and the tire volume determine the spring behavior of the tire and thereby to a large extent the comfort of the bicycle.
The larger the volume of the tire, the greater the spring travel and better comfort.
The best way therefore is when a fairly wide tire is used.
The spring stiffness of the tire is determined by the pressure in the tire.
The lower the pressure, the weaker the suspension.
A tire with low pressure will properly remove all irregularities.
At low pressure, the rolling resistance, however can be high and the tire can unroll in a bend of the rim.
On the tire is the recommended pressure and the maximum pressure printed.
For heavy riders the tire should be inflated. The pressure can be measured by putting a separate pressure gauge to the valve or by using a bicycle pump with a pressure gauge.

The rolling resistance of the tire is determined by the pressure and the material of the tire. The higher the pressure, the lower the rolling resistance, and the more flexible a tire (material and wall thickness), the lower the rolling resistance. Racing tires are fairly narrow. This is not because narrower tires have lower rolling resistance but because narrow tires are stronger. As a result, the pressure in the tires may be higher, and the wall thickness of the material to be thinner. A narrow tire of high pressure gives much less comfort than a wide tire. The rider must make a choice between comfort and low rolling resistance and high comfort and high rolling resistance. Profile also increases the rolling resistance. Profile makes the tire ever thicker.

A flat tire is one of the biggest annoyances of cyclists. It is therefore important to minimize the risk of a puncture. The following items may lead to a puncture:

  • The penetration of sharp objects
  • The rupture of the wall of the tire
  • The tearing of the tread of the tire
  • Porosity of the inner tube
  • Small cracks in the outer tire
  • of unleashed adhesives
  • A broken valve
  • Slipping of the tire on the rim
  • A unpropperly fitted inner tube
  • Installation of a tube with a small width
  • Sharp spoke nipples, nipple holes or protruding spokes

The resistance to penetration of sharp objects is determined by the construction of the tire. A tire consists of several fiber layers. By processing extra strong plies in the tire , the resistance to punctures is increased. As a protection layers are used composed of aramid fibers and / or layers of a flexible rubber that bulges to a sharp object. Also, the use of latex tubes increases the resistance to penetration of sharp objects. If a puncture have been caused by a sharp object it must be checked properly if the sharp object is still in the tire. Removing small stones can prevent them to penetrate deeper into the tire and eventually puncture the tube. Small cracks in the tread of the tire can be repaired with superglue.

Tearing of the wall of the tire may be caused by wear and tear of the cheek, a too high pressure in the tire, burrs on the rim and deterioration of the strength of the cheek by overheating.
Wear of the cheek can be caused by poorly fitted brake pads or a bad alternator mounted. An alternator may only be used in conjunction with a tire tread that is specially made for a altenator.
A too high pressure in the tire will lead generally not directly to a flat tire.
However, the risk increases that the band is tearing.
By sharp burrs on the rim the tire can tear there.
Sharp burrs are usually caused by the use of steel tire with aluminum rims.
When using a rim brake for a long period, the temperature in the tire can get very high so that the strength and rigidity of the rubber is impaired.
As a result, the probability of a punctured tire becomes larger.
Because prolonged braking with rim brakes just happening in long runs, this can lead to dangerous situations.

Many people think that the leakage is caused by the increased pressure as a result of the temperature increase. However, the pressure increase is small. At a temperature rise in the tire of 60 ° C, the pressure in the tire but above 1 bar. After all, the increase in pressure is directly proportional to the temperature increase. (In case of a temperature increase of 20 ° C to 80 ° C, the temperature increase is calculated in K 20% (357K-297K = 1.2). When the pressure in the tire was 5 bar, then the pressure is 6 bar.

A crack in the tread indicates that there is too long by driving with a worn tire. A tire must be replaced when there is virtually no profile more visible.

An inner tube can be porous by old age, and if there is grease, oil, petroleum jelly or a cleaning agent is in the tire. When replacing a porous inner tube should be checked properly if the outer tire is grease free. A tire can be marked by aging cracks in the tread. A tire should be replaced with cracks in the tread. Patches may be wrong glued or come off as the tire gets too hot. With a flat tire it is for the bicycle specialist usually more economical to replace the tire.

If the cause of the puncture is not clear, it is advisable to first check valves.
If the leak is caused by a broken valve, the tire does not have to be disassembled and can only replace the valve. Especially the Dunlop Valves are quickly broken ..

Driving with too soft tires, there is a risk that the tire pass against the rim when driving over a bump. This can cause two small incisions in the inner tube (also called snakebite). Especially thin road tires suffer from this because suspension travel is limited to these bands. Narrow tires must always be inflated hard to prevent tip against the rim.

Using tire lifters during assembly of the tube leaks can be made. Also, the inner tube can be clamped during assembly between rim and bead wire.

During assembly of a narrow tube in a broad tire casing, the inner tube must be very stretched to press against the tire. Consequently, the risk of rupture of the inner tube increases. Latex tubes here have fewer problems than butalex tubes because latex can stretch more.

By sharp nipples, nipple holes and outstanding spokes, the inner tube leak can be.
Grind spokes that stick out and fit a good rim tape.
In order to avoid punctures, there are anti-leak products on the market.
These will be injected into the tire.
If there is a hole in the tire, the anti leak agents flows herein and close the hole.
The disadvantage of anti-leak products is that the stuff is toxic and tire patches not sticking well as there is anti-leak agents in the tire .

A radical method of getting rid of punctures is mounting a massive band. The disadvantage is that the comfort of solid tires is very small compared with pneumatic tires and they have slightly less grip than pressured tires by the lack of suspension and lower coefficient of friction of the material they are made of.

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