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Changing presta to schrader valves on cyclops upright cycle pump

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You should already have an adaptor in your pump, if you don't, go to a bkike shop and buy an adaptor for around a $1.00.

Posted on Dec 30, 2010

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1 Answer

My innertube leaks air and i am no familiar with the air intake device on it


There are two kinds of valve on bicycle tubes, Presta and Schrader. You are probably more familiar with Schrader because this is the type used on cars and most bikes. And I am guessing that you have Presta on this bike (Presta is skinnier than Schrader, and it has a little nut that you unscrew, where Schrader has a spring inside it. Google images for "Presta Schrader" and you will see both kinds, and you will also see a little screw-on adaptor that you can use on a Presta to make it fit your pump or air-hose like a Schrader. You can buy these adapters on-line or at any bike store. Good luck!

Oct 03, 2012 | Fuji Bicycles Cross Comp

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Hi there i boufht this pump and have found that i have two different valves on my bike one is a normal one and one is a schraieder, how do i chnage the pump attachment so i can pump up the schraieder one?


You can buy an inexpensive adapter to fit on either valve stem to convert it from Presta to Schrader or from Schrader to Presta - whichever is better suited to your pump and/or your other bikes. If you want to go with Schrader as your standard (the fatter one) you can replace the tube on your wheel that has the Presta valve - but you have to enlarge the hole in the rim. If you do that be sure to make the edge of the enlarged hole nice and smooth with sandpaper. If you want to standardize on Presta, you will need a small bushing to make the existing hole in the rim smaller. I hope you found this helpful. Good luck, Al K

Jun 21, 2011 | Topeak Mini Master Blaster

1 Answer

How do i set up the pump to inflate a presta valve tyre?


If it is not a Presta pump, then you will need an adapter. These adapters usually run for less than a dollar and are easy to use. You can just screw it onto the Presta valve and then it converts it to a Schrader. You can see what they look like HERE. They should be available at any bicycle, camping or hiking store. Good luck and be safe riding! (Helmets are your friend)

Mar 04, 2011 | Topeak Peak Master Blaster Dx Pump

1 Answer

How do you inflate this tube with the presta valve?


The following link is a good explanation of inflating a presta valved tube if you have a pump with a presta valve head.

If you have an older pump that does not have a presta valve head, you can purchase a schrader valve adapter from your local bike shop that screws onto the presta valve and will allow you to utilize a pump with a schrader head.
A good explanation can be found here: http://bicycletutor.com/presta-valve/

Feb 18, 2011 | Cycling

1 Answer

How do you fill the tires on this bike. The valve stems are not typical bike tire stems. I am (obviously) a novice biker and have not owned a bike in several years. The pump I bought is a Schwinn pump...


There are two types of valve stems, schrader ( like the valve stems on your car ) and presta. See images on this page http://www.sheldonbrown.com/brandt/presta-schrader.html Since you are asking I assume you have presta valves. You can get an adapter to convert the presta valves for use with a schrader pump. Unscrew the small knurled nut on top of the presta valve to open it, press down and release the small top to ensure the valve is free to move. Snug up the top when it is full.

Dec 23, 2010 | Schwinn Midmoor 700c Men's Hybrid Bicycle

1 Answer

I have a Zefal HP frame pump. I'm trying to inflate a tire with a Presta valve. It just won't inflate. It doesn't latch onto the valve and seems to big for the valve body. Is there a diagram available...


Let's hope you didn't force it and snap the plastic point off.

Most Zefal pumps come with a reversible head that can adapt to either Presta or Schreader (like on cars). You unscrew the barrel at the working end of the valve, carefully tap out the rubber cylinder and the plastic internal piece behind it.

Insert the plastic piece in either of two ways. Pointy part Out (for Schrader) or just a round opening Out (for Presta). Rotate the rubber piece correspondingly to show the large opening for Schrader or the smaller opening for Presta and place it inside the valve over the plastic piece. Screw the knurled barrel on tightly.

Aug 12, 2010 | Zefal Bicycle HPX 3 Road Frame Pump

1 Answer

Can't get this pump to work on either schrader or presta valves! Help!


Its probably the fact that there are two separate holes for presta anad schrader, if so put your finger over the one you want to use and give small pump to vent it then attach, if not then you have to screw off the cover and invert the inner rubber core for presta or schrader, can you give me more details or pic...

Mar 26, 2010 | Cycling

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