90 Degree Valve Stem Adapter

Jay51 · Oct 19, 2017

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-Extension-Motorcycle-Universal-Extenders/dp/B072WMZDFF/ref=sr_1_1?ie=UTF8&qid=1508442019&sr=8-1&keywords=90+degree+right+angle+tire+valve+stem+adapters

Blrfl · Oct 19, 2017

Those are not intended to be used with rubber valve stems.

--Mark

Mellow · Oct 19, 2017

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..

Duporth · Oct 19, 2017

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.

skipcurt · Oct 19, 2017

Why not just go with the Ariete's?

Skip

capnkirk · Oct 19, 2017

skipcurt said:
Why not just go with the Ariete's?

Skip

Yup, you want these: https://www.ebay.com/itm/-/272637550741?rsta=en_US(en_US)&cnac=US&mail=sys&e=op&unp_tpcid=xpt-auction-GXOTx&ppid=PPX000605&calf=ee15f9fc5c8d&calc=ee15f9fc5c8d&pgrp=main:email&unptid=7e0c3268-9c9b-11e7-9440-441ea149d098&mchn=em&t=&s=ci&page=main:email&cal=ee15f9fc5c8d&cust=34V92331UF701472U

Jay51 · Oct 19, 2017

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.

Woodchuck · Oct 19, 2017

http://j.b5z.net/i/u/2099405/i/ec/CM1044.jpg
If your have TPMS you might want something like this.
Lyle

Erdoc48 · Oct 19, 2017

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).

Igofar · Oct 19, 2017

capnkirk said:
Yup, you want these: https://www.ebay.com/itm/-/272637550741?rsta=en_US(en_US)&cnac=US&mail=sys&e=op&unp_tpcid=xpt-auction-GXOTx&ppid=PPX000605&calf=ee15f9fc5c8d&calc=ee15f9fc5c8d&pgrp=main:email&unptid=7e0c3268-9c9b-11e7-9440-441ea149d098&mchn=em&t=&s=ci&page=main:email&cal=ee15f9fc5c8d&cust=34V92331UF701472U

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

Slydynbye · Oct 20, 2017

I'm hoping to get a better installation and longevity out of the pair I just ordered........we'll see.

ST Gui · Oct 20, 2017

I've got a 90Âº 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.

Igofar · Oct 20, 2017

Slydynbye said:
I'm hoping to get a better installation and longevity out of the pair I just ordered........we'll see.

Does this mean you'll park in the street now, instead of the end of the driveway? :rofl1:

Igofar · Oct 20, 2017

ST Gui said:
I've got a 90Âº 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.

:worthless

Erdoc48 · Oct 20, 2017

If it helps, I have this one from Amazon:

https://www.amazon.com/gp/product/B01EQQH20O/ref=oh_aui_detailpage_o09_s00?ie=UTF8&psc=1

Igofar · Oct 20, 2017

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:

SteveST1300 · Oct 20, 2017

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.

okmurdog · Oct 20, 2017

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.

90 Degree Valve Stem Adapter

Jay51

Blrfl

Natural Rider Enhancement

Mellow

Joe

Duporth

skipcurt

Skip

capnkirk

Jay51

Woodchuck

(Lyle)

Erdoc48

Igofar

Slydynbye

Will ride for Pie

ST Gui

240Robert

Igofar

Igofar

Erdoc48

Igofar

SteveST1300

okmurdog

Will Ride for Pie