90 Degree Valve Stem Adapter

Jay51

Jay51

Joined
Dec 28, 2016
Messages
184
Location
Orange County California
Bike
2006 ST1300A
Has anyone used one of these types of 90 degree valve stem adapters that screw on to the existing straight valve stem?
I was wondering if adding it would add torque to the existing rubber stem and weaken it somehow from the extra flexing.
My tires are relatively new and plan to add the through the rim type on next tire change.

https://www.amazon.com/ILOVA-Extens...0+degree+right+angle+tire+valve+stem+adapters
 
They would be ok JUST for adding air but just taking them on/off will bleed some air out... Leave them on and you will suffer a catastrophic rubber valve stem failure..
 
I use the 90 degree stem when checking tyre pressure only. Then replace the std cap.

I have read that fixing the 90 deg metal stem 'permanently' can fatigue the rubber rim stem and make it leak or fail suddenly.
 
I certainly do not want a catastrophic rubber valve stem failure... :-(
So, thanks for the heads up of the dangers of leaving them on.

I was planning to add the Arietes at my next tire change.

I just hate having to get down on my hands and knees to add air.
 
I have one and use it only to add air (my valve stems are the short rubber ones)- I will add the 90 degree ones when it’s time for a tire change on the 94- the 00 has the 90 degree ones and they are great (they are not the screw in kind- similar to a regular rubber stem with a chrome 90 degree extension built onto it). When you unscrew the extender, there’s a scant loss of air and then check the pressure with the extender off (I use a Slime branded tire gauge with the flexible line so I can get at the valve stem).
 
Last edited:
capnkirk said:
Yup, you want these: https://www.ebay.com/itm/-/27263755...email&cal=ee15f9fc5c8d&cust=34V92331UF701472U
Click to expand...

FYI, I just removed two of these from a set of tires this week. One was leaking air from a torn rubber grommet, and the other one loosened up and you could spin it around with your fingers.
Both were found with the attachment nut loose due to the rubber compressing and loosening up.
I'll stick with stubby rubber stems and change them every tire change thank you very much.
.02
 
I've got a 90º adapter to use for air fills and then it goes in the bike's glove box. I've also got a set of T-valve stems that'll go in on the next tire change.
 
Slydynbye said:
I'm hoping to get a better installation and longevity out of the pair I just ordered........we'll see.
Click to expand...

Does this mean you'll park in the street now, instead of the end of the driveway? :rofl1:
 
ST Gui said:
I've got a 90º adapter to use for air fills and then it goes in the bike's glove box. I've also got a set of T-valve stems that'll go in on the next tire change.
Click to expand...

:worthless
 
I have a couple of those type that I picked up at the BMW shop, that I carry in my Honda Metropolitan's for filling the air in those little bitty ten inch wheels :hotpepper
The BMW ones are really nice machined brass and have rubber o-rings in the caps, but cost twice as much :tc1:
 
I have used the ariette style 90 deg stems for years never a problem. They should probably be replaced every few years. I think this was discussed in another thread.
 
I put over 100,000 miles on a set of Ariete (Bridgeport) angled stems with zero issues. Be sure you torque the backer nut to the specified torque. A pinch of silicone oil on the gasket probably doesn’t hurt either, although I installed mine dry & made sure the rim was squeaky clean.
 
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