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Normal Topic Angled valve extenders are the pits (Read 85 times)
Kookaburra
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Angled valve extenders are the pits
06/10/18 at 22:30:19
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I think this is a tyre rant, if not it is close to one. From my aging and stiffening perspective, the worst aspect of the snow flake wheels on the R65 is having to find, fit and unfit the right angled valve extension to check and pump up the  tubed tyres at the service station. The clear advice seems to be to not leave the extensions on the valve during travel so I have this on and then off again sweaty struggle every time I take the bike out.

Does any one have an alternative solution to this minor but time consuming irritation?



  
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Tony Smith
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Re: Angled valve extenders are the pits
Reply #1 - 06/11/18 at 04:11:59
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I use tyre valve extenders intended originally for use on dual wheels on trucks.

The link below is not the ones I have, merely to give you the idea of what to look for. I'd suggest you go to your nearest truck tyre place and buy one there, not only will it be cheaper than Fleabay, you can also get longer ones.

The one I carry is 12" long which is kinder on my 60 year old bones when putting air in. They are also easier to fit than those blasted 90 degree adaptors because there is more to hang onto.

Last comment, I carry these for putting air in on the road. At home I use a bicycle pump with a Schrader adaptor - the one I have has a pressure gauge built in - it proved wildly optimistic but I have "calibrated it with pieces of tape for 30/32/34/36/38 psi. Quick, easy and you are not buggering around at servos with all your riding clobber on.
  

1978 R100RS| 1984 R65 | 1984 XT350 | 1992 KLE500 | 2002 R1150GSA
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Tony Smith
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Re: Angled valve extenders are the pits
Reply #2 - 06/11/18 at 04:12:21
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1978 R100RS| 1984 R65 | 1984 XT350 | 1992 KLE500 | 2002 R1150GSA
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Tony Smith
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Re: Angled valve extenders are the pits
Reply #3 - 06/11/18 at 04:19:52
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Brain fade is setting in, one more thing I forgot to mention.

The best bicycle pump is not necessarily the best pump for pumping up motorcycle tyres (and occasionally car tyres too). You see a "proper" bicycle pump needs to allow a slightly built, possibly female, rider to pump their 23C racing tyres up to 125psi. Some of them are even designed to pump up shocks and forks and given that those can have pressures up to 300psi the bore of the pump is minuscule to allow the previously mentioned slightly built, possibly female rider to reach those pressures.  (I have a foot pump for pumping up Fournales shock absorbers  and using it to pump up a motorcycle tyre is an exercise in extreme frustration - 700 strokes to get to 36psi).

No, what you want is a cheap Chinese made foot pump with around a 40mm bore - that will pump up a motorcycle tyre easily, for example going from 28 to 36psi on a 4.00*18 takes exactly 10 strokes. Try and buy one that is set up for Schrader valves and has a Presta adaptor, not the other way around.
  

1978 R100RS| 1984 R65 | 1984 XT350 | 1992 KLE500 | 2002 R1150GSA
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Matt Chapter
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Re: Angled valve extenders are the pits
Reply #4 - 06/11/18 at 11:57:14
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I'm not sure where that advice is found - I've run a 90 degree extender on my rear tire for thousands of miles.  I have tri-y tubeless rims, of course, but I haven't had any trouble, even up to vehicle max speed.
  

'86 R65 with '84 motor ~66000 miles.  SS lines, Spiegler rotor, Progressive monoshock, Keihan silencers, a piece of Pichler fairing.
'76 CB400F ~26000 miles.  Weepy SS lines, big dent in the tank.
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Re: Angled valve extenders are the pits
Reply #5 - 06/11/18 at 13:51:34
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My bike came with one of those angled extenders in the tool kit.  I only carry it in case I come across an inflator that wont fit as at home my car type foot pump works fine.

Some years ago I had a rough stab at what what the bending force on the valve stem would be at high speed if the adaptor was left on.

http://www.bmwr65.org/YaBB2.612/cgi-bin/yabb2/YaBB.pl?num=1394735933/30#30
  

Barry Cheshire, England 79 R45
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Justin B.
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Re: Angled valve extenders are the pits
Reply #6 - 06/12/18 at 14:50:20
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I plan on running tubeless on my R100, if I ever get around to it, and ordered 45 degree valve stems to install.
  

Justin B.

2004 BMW R1150RT
1981 R100RT - Summer bike, NEKKID!!!
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