Author Topic: 90 degree valve stems ????  (Read 2509 times)

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Offline Sourkraut

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90 degree valve stems ????
« on: August 17, 2016, 02:43:13 pm »
I'm getting ready to replace front tire, and am wanting to put 90 degree valve stems in. Motorcycle Superstore has what I think I would like, but it gives 2 choces....8mm & 10mm. Can anyone tell me which size is required. I've looked in my big book and also talked to local Kawasaki dealer, and they can't provide answer. So I'm turning to the "real" experts.

Thanks....John/Sourkraut

Offline Piston720

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Re: 90 degree valve stems ????
« Reply #1 on: August 17, 2016, 04:31:01 pm »
You could also just carry a 90 Deg adapter for those rare times you need to add air.

Offline AmphibSailor

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Re: 90 degree valve stems ????
« Reply #2 on: August 17, 2016, 05:52:48 pm »
I belive it's  11.3mm for stock rims.
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Offline Bob_C_CT

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Re: 90 degree valve stems ????
« Reply #3 on: August 18, 2016, 10:12:53 am »
Not sure since I don't have stock rims but make sure they install them pointing out to the right. I didn't tell them which side so mine are pointing left and when on sidestand makes it a little harder to get to.
97 C10,ZRX Front, Meanstreak rim

Offline GeorgeRYoung

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Re: 90 degree valve stems ????
« Reply #4 on: August 18, 2016, 12:00:10 pm »
I personally don't like the idea that centrifugal force is always acting on the right angle stem to bend, flex and maybe break it.

Here's the alternative I use to allow access to the air chuck:
https://www.kurveygirl.com/shop/product_info.php?cPath=27&products_id=71&osCsid=bf6decb22f96b435d209cff7bd092c05

Offline Sourkraut

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Re: 90 degree valve stems ????
« Reply #5 on: August 18, 2016, 12:49:11 pm »
Thanks for replies. Here's another question concerning angled valve stems.

What do y'all think are the chances that a 45 degree valve stem, pointed to the right, could cause the serious scalping on the right side of my front tire???? I still have plenty of tread depth in center, but since I have a ride coming up, I have already bought a replacement for it.

Just wondering.

Thanks....John/Sourkraut

Offline Bill Hookman

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Re: 90 degree valve stems ????
« Reply #6 on: August 18, 2016, 07:00:35 pm »
Whatever you do, DO NOT USE 90 DEGREE STEMS WITH RUBBER BASES THAT YOU PULL THROUGH THE RIM.  I had them and spent a morning at the Canaan Valley National replacing the rear one and was stranded on the side of the road on the way home when the front tore loose.  I have replaced both with straight stubbies that have the lock nut.  I had my rear 90 degree pointed left, so as not to have to deal with the brake rotor being in the way.  I don't see how a little valve stem would have any impact on uneven front tire wear, since it's weight is so minimal.
Bill Hookman  Columbus, OH

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Offline Outback Jon

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Re: 90 degree valve stems ????
« Reply #7 on: August 18, 2016, 07:44:31 pm »
I use these from KurveyGirl.com.  I replaced them after a couple of tire changes because I saw some cracks starting in the rubber gasket.  But once I removed them, I found that those cracks were extremely shallow and apparently only cosmetic.  There was plenty of good, flexible rubber still sealing everything.  They've worked great for 50k miles or so, now.  Next time I'm thinking about replacing them with the anodized aluminum ones, but that's just for the nicer look.  The ones I have work great and make filling the tires MUCH easier.   
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Offline WANDRNG

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Offline RWulf

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Re: 90 degree valve stems ????
« Reply #9 on: August 19, 2016, 12:12:28 am »
I guess that's why you never see them on winning race bikes.

Offline Rain Dancer

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Re: 90 degree valve stems ????
« Reply #10 on: August 20, 2016, 12:22:08 am »
"Of course, that's just my opinion, I could be wrong."  Dennis Miller

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Offline Greenie

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Re: 90 degree valve stems ????
« Reply #11 on: October 05, 2017, 10:01:44 pm »
Whatever you do, DO NOT USE 90 DEGREE STEMS WITH RUBBER BASES THAT YOU PULL THROUGH THE RIM.  I had them and spent a morning at the Canaan Valley National replacing the rear one and was stranded on the side of the road on the way home when the front tore loose.  I have replaced both with straight stubbies that have the lock nut.  I had my rear 90 degree pointed left, so as not to have to deal with the brake rotor being in the way.  I don't see how a little valve stem would have any impact on uneven front tire wear, since it's weight is so minimal.

I'll second that! I've had a 90 degree valve stem on the back tire for 2 years. Yesterday it failed by leaking (splitting) on back side. Centrifugal force at high speeds pushed the valve toward the rim and the back side broke allowing a pretty fast loss of air. I had a short straight valve with a lock nut installed today.

Offline connie_rider

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Re: 90 degree valve stems ????
« Reply #12 on: October 05, 2017, 10:15:22 pm »





https://www.amazon.com/Oxford-Valve-Access-Tool/dp/B00GC299LQ

http://www.revzilla.com/motorcycle/oxford-valve-access-tool


I like the adapter that WANDRNG posted.
I have a 90" screw on adapter for emergencies, but his is better.
I think I'll get one.

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