Mountain bikes can go, either way, some use Schrader, some prefer Presta. Sports and racing bicycles have used Presta valves in the past due to their slender shape and enabled racers to inflate tires with a simple pump with an attached chuck pump head and no hose.
Presta valves are not as easy to pump due to the small diameter of the Presta valve, thus requiring a smaller hole in the rim. The size is important for narrow cross-sectional strength is significantly reduced by the size of the stem hole and in narrow rims such as clincher tires leave where there is insufficient space between tire beads for larger Schrader valves. Narrow wheels can be significantly weakened by larger valve holes.
Presta valves are more commonly used on skinny road bike tires because they are narrower and require a narrower hole in the rim. The valve hole is the weakest part of the rim so the smaller this is the better. Presta valves need the small head unscrewed counter-clockwise before the pump head is placed on to the valve.
Then make sure the head is on far enough and pump up your tire. When you remove the valve head, you then need to tighten the small head all the way down, but not overly tight. Almost all Presta valves as of have a removable core, which can be identified by two wrench flats on the coarse valve cap threads. The benefits of this are that it does not require replacing the tube when the presta nut breaks off and makes it possible to inject sealant like Slime into presta tubes.
Presta valves adapt to higher pressure than Schrader. Road bike tires often exceed pounds, while Schrader tubes top out at about half that. If your tubes have Presta valves, you need a special pressure gauge made just for Presta valves.
Typically, most floor-type pumps for Presta tubes already have them built-in. Presta valves can be used for a release of air pressure by just pressing the unscrewed valve down, allowing for a controlled air pressure release. Presta stems come in different lengths, so if you have deep carbon rims you can purchase tubes with stems that are long enough to accommodate your rims.
Simply unscrew the chuck cap, flip the gasket to the side that matches the valve, and screw the cap back on. Just press the head firmly onto the valve, flip the lever to secure, and start pumping.
And suspension pumps are so small that it would take forever to inflate a Schrader tire. Most valves are already attached to tubes, so swapping one means replacing the whole tube. However, there are two scenarios that may require a valve replacement:. Most local bike shops have replacement cores for sale. Bikes and Gear. United States.
Type keyword s to search. Today's Top Stories. Are Wider Tires Always Faster? Related Story. Bicycle tubes with Presta, left, and Schrader, right, valves. You may be able to find the same content in another format, or you may be able to find more information, at their web site.
A Woods or Dunlop valve. A Presta valve with the cap on. Bicycle Rubber Rim Strips. Talcum Baby Powder. Minis also can be carried in a jersey or pack if you prefer not to adorn your bike with a pump. While it typically takes more strokes and effort to inflate a tire with a mini than a frame pump, minis are small enough to fit on any bicycle; even dual-suspension models that would never accept a full-size frame pump.
That's why minis are so popular. The only downside with minis is that they often require more effort than frame pumps to reach proper tire pressures. However, all our pumps will inflate tires sufficiently to allow finishing your ride. CO2 inflators photo provide a simple, efficient method to inflate your tires on rides. These pumps utilize CO2 cartridges, which are filled with compressed CO2 gas. The advantages of these pumps is that they weigh very little, fit easily in a bike bag or pocket, and they provide almost instant inflation to optimal pressure, which saves you the inconvenience of spending several minutes pumping.
However, CO2 pumps only provide as many opportunities to fill your tires as you have CO2 cartridges. If there's a problem with the inner tube or the CO2 cartridge, you'll be out of luck. Also, if you choose one of these pumps, please recycle the used CO2 cylinders with other aluminum items. We always stock a fine selection of pumps. Please come in soon to check them out! Indoor Cycling. Car Racks. Gift Cards.
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