Werkzeuge und Hilfsmittel für die Arbeit an Fahrradreifen: Unterschied zwischen den Versionen

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To repair a flat tire during a ride, you'll need as a bare minimum:

Beyond this, carrying a spare folding Kevlar-bead tire or rolled-up tire will get you back onto the bicycle faster if a tire has been damaged, and allow replacement of an unrepairable tire. The Kevlar-bead tire is more compact, but the wire-bead will fit in a touring bag or pannier if rolled into three loops as shown in the video below.

     CO2 Cartridges Compressors Patch Kits Pressure Gauges Pumps Tire Levers Wrenches Valve Adaptors  

We now move on to describe tools in more detail, also including ones for the home workshop.

While an experienced thumb and forefinger, pinching a tire, can give a rough idea of the pressure, a pressure gauge is necessary to get accurate and repeatable readings. Pressure gauges are built into some bicycle pumps. Free-standing pressure gauges are of three types :

* "Digital" gauges have a liquid-crystal readout, and an electronic sensor. They are probably the most accurate, though real-world accuracy of any type of gauge is limited by the fact that a small amount of air is lost as the gauge is removed from the valve.

  Presta-adaptor

If you have Presta valves, it is a good idea to carry a Schrader/Presta adaptor. It is a small thing and easily lost, unless you leave it screwed onto the valve of one of your tires. You can add a Schrader valve cap.

You have 7 possible choices of tools to inflate your tires.

     CO2 Cartridges Compressors Floor Pumps Foot Pumps Frame Pumps Mini Pumps Track Pumps  

CO2 cartridge inflatorCO2 cartridges are small cylinders of carbon dioxide, originally made for seltzer siphons. With a suitable adaptor, they can be used to inflate bicycle tires. When everything goes well, this is the fastest way to inflate a tire. They're also the lightest and most portable inflation device available, so they're fairly popular among competitive cyclists.

The downsides of CO2 cartridges are that they are expensive and wasteful, and that each cartridge is normally only good for inflating one tire one time. While a few of the cartridge systems do permit controlled release of CO2, most of them are "all or nothing" designs, so you can't use them for topping off a slightly soft tire. If you carry only one cartridge and get two flats on the same ride, you may be in for a long walk. We advise against relying on CO2 cartridges except in competition.

Compressors are a popular alternative, when available. Most gas stations will have a compressor available, either for free or coin-operated. While these are convenient, they can also be dangerous. If you use a gas-station compressor, you risk blowing the tire off the rim, so you need to be extra-careful, and use a separate, hand-held pressure gauge, too. The problem with using gas-station compressors for bicycle tires is that the volume of a bicycle tire is so much smaller than that of a car tire, so the bicycle tire inflates too quickly.

Gas-station compressors work only with Schrader valves or Schrader adapters.

The most effective human-powered inflation tool is the "floor" or "track" pump. Floor pumpThis has a long vertical cylinder, with a "T"-shaped handle that you raise and lower with both hands. This type of pump has some sort of footrest to keep the bottom held in place, and a hose that connects to the valve. Floor pumps get most of their action from the user's back, and with an assist from gravity, as the actual pumping occurs on the downstroke.

A floor pump for bicycle use should have a barrel about an inch in diameter: a thicker barrel will make pumping up a high-pressure tire too difficult. The better floor pumps have built-in gauges and holding tanks, so you can see just how much pressure you've got, while you're pumping. This makes them very fast and convenient to use. They also provide a bit of upper-body exercise to balance out all the leg exercise which bicyclists get!

A less-common type of pump, similar to a floor pump, also sits on the ground, but is operated by pressing with the foot. These are fast, but mechanically complex due to the extra linkages required. They also tend to be designed more for delivering volume than for pressure, so they don't generally pump up to high enough pressure for narrow road-type tires.

  frame pump

Frame pumps are appropriate to carry on the bike for emergency, on-the-road use. They take a fair amount of work to get up to full pressure, but it beats walking! They pump fairly easily at first, but they can require a fair amount of strength as the pressure gets high.

Older frame pumps have a hose that screws onto the tire valve. This works poorly with a Schrader valve because air escapes when the hose is being unscrewed. Newer pumps have a clamp-on head that holds pressure better.

Be careful that you do not bend or twist the valve stem when using a frame pump with an integral head. Bracing the pump against a tree or a rock can help to hold the valve stem straight, so you don't risk breaking it off or tearing the inner tube. A pump with a hose avoids this problem.

A frame pump is not a substitute for a good floor pump: the well-equipped cyclist will own both. The floor pump is for routine pressure topping off at home, and the frame pump is for fixing flats that occur while you're out riding...it's too hard to use for non-emergencies.

The most popular type of pump to carry on the bicycle -- already mentioned in this article -- is the "mini" pump, a shorter version of a frame pump. A clip may attach a mini pump to water-bottle cage bosses or directly to a frame tube, or the pump may even be pocket-sized. Mini pumps are small and easy to carry, but they can take much longer to use than full-sized frame pumps. Some newer mini pumps engage the pressure chamber on both the push and pull stroke; these are faster than others. Topeak Morph ™ series pumps have some floor-pump features including a footpad and hose. As already described, mini pumps address the problem of theft, as they are small enough to be carried in a bike bag that you can remove when parking in high-risk locations. They also are lighter than than full-sized frame pumps..

  tire levers

  Kool Stop Bead Jack

Patch kits are available in any bike shop. A patch kit is usually a small plastic box containing a few patches, a tube of rubber cement, and a bit of sandpaper or a metal scraper for preparing the tube surface. The metal scraper is not advisable for use on bicycle inner tubes -- it cuts too deep. The best patch kit is the Rema "Tip Top" from Germany.

Make sure to follow the instructions.

Glueless (peel & stick) patches are available, and they are slightly more convenient than conventional patches. Unfortunately, they don't have a very good reliability record, and I can't recommend them--you're much better off with a standard patch kit.

Don't laugh. Duct tape cam patch an inner tube well enough to get to the next bike shop, and can also be used as a tire boot. You probably won't carry a roll of duct tape with you, but you could roll up a length of it, or buy, beg or borrow some in an emergency.

Unless your wheels have quick release hubs, you'll need a wrench or two to remove the wheels. (The term "wrench" is not common in British usage, where the the term "spanner" or "key" is generally preferred.)