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The Tech Zone => Gadgets => Topic started by: RBEmerson on April 16, 2017, 05:56:08 pm



Title: Believable air gauge?
Post by: RBEmerson on April 16, 2017, 05:56:08 pm
Of three air guages, two agree within under 5 PSI. The third is in the recycle (clueless). Who makes a reliable, accurate air gauge?


Title: Re: Believable air gauge?
Post by: SLK50 on April 16, 2017, 06:29:29 pm
I don't believe an accurate gauge exists.
It's far more important to have one that is consistent.

Once you determine what the "correct" pressure is
via the 10% rise in pressure from cold pressure to
fully warmed, you need only adjust for any deviation.
Hence, the need for consistency.
It won't really matter what the gauge says the
measured pressure is.


Title: Re: Believable air gauge?
Post by: Sport on April 16, 2017, 06:58:28 pm
I have a couple $1.98 pencil gauges that have worked perfectly for years.  I've compared them to reliable 'never dropped' tire shop gauges and two cars with TPMSs and based on the visual evidence over the years on my car tires and m/c tires on several bikes, they perform better than my air compressor gauge and better than (more accurate than) a couple high tech digital gauges I've used.  My tire wear is great so... :)


Title: Re: Believable air gauge?
Post by: Canuck on April 16, 2017, 08:37:04 pm
I've been using an inexpensive Accutire digital gauge for years. It's now on its fourth battery. I have tire pressure monitoring on both my cars, and anytime I have compared my gauge to the TPMS measurements, it's been quite accurate.

If you want the best though, you should see if you can find out what most race teams use. I suppose they may have compressors that just cut out when the pressure hits the desired level.


Title: Re: Believable air gauge?
Post by: RBEmerson on April 17, 2017, 11:46:26 am
Partly this is driven by "I want something I can believe" and part of this is tuning tire pressure to my preference, starting from the factory recommended pressure. Assuming their gauges aren't ...um... somewhat random, then my gauge should be as accurate is theirs. (Precise = hit the same spot in a target every time, accurate=hit the bullseye every time)


Title: Re: Believable air gauge?
Post by: Sport on April 17, 2017, 01:25:31 pm
"Factory" recommended pressure?  Tire or which factory?  What do you think is the recommended psi?


Title: Re: Believable air gauge?
Post by: Dan K on April 17, 2017, 04:55:09 pm
I've found that most tire pressure gauges are precise and consistent. It's the accuracy part where they fail...

I've had digital and pencil and dial gauges as well as a gauge on my compressor... I trust the dial gauges but your guess is as good as mine.

- Dan


Title: Re: Believable air gauge?
Post by: RBEmerson on April 17, 2017, 09:12:01 pm

"Factory" recommended pressure?  Tire or which factory?  What do you think is the recommended psi?
In my case, factory = BMW Motorrad.  :)


Title: Re:
Post by: three west on April 17, 2017, 09:14:44 pm
I like the gauge I got from Roadgear

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Title: Re: Believable air gauge?
Post by: jay547 on April 17, 2017, 10:38:10 pm
I read it somewhere twice.  :p


Title: Re: Believable air gauge?
Post by: Sport on April 17, 2017, 11:54:35 pm

I read it somewhere twice.  :p


Don't know how they duped and I couldn't remove just one so BAM, they were both removed.

I'll ask again.


Title: Re: Believable air gauge?
Post by: Sport on April 17, 2017, 11:55:46 pm

In my case, factory = BMW Motorrad.  :)


Did I read that you start with 40-42 psi?


Title: Re: Believable air gauge?
Post by: RBEmerson on April 18, 2017, 10:10:21 am
Now I do. It's not the spec. I used that as a starting point for seeing what works.

IIRC the overall spec is about 4 PSI less than I use. At that point the bike feels mushy and doesn't "like" turning. It still does if I get the bike back from the shop and the tires are back to spec.

At least I think I'm 4 PSI over spec. if a) I started at spec. and b) I'm really 4 PSI higher. I use the same gauge, so I consistently have the same error, if the gauge isn't right.


Title: Re: Believable air gauge?
Post by: zer0netgain on April 28, 2017, 07:25:53 am
I bought mine from Amazon.  Basically look for top rated and read the reviews...especially the negative ones.

Odds are if it's a bad gauge, people will give it a bad report.

https://www.amazon.com/gp/product/B0006O2S0U/ref=oh_aui_detailpage_o03_s00?ie=UTF8&psc=1

Under $15 bucks.


Title: Re: Believable air gauge?
Post by: RBEmerson on April 28, 2017, 08:40:34 pm
I have one, and it's clearly capable of creative fiction.


Title: Re: Believable air gauge?
Post by: Canuck on April 29, 2017, 02:43:54 pm
I checked my Accutire gauge yesterday against the TPMS in my SUV, and both were within 0.5 psi of each other. And of course right in the middle of doing the four tires, the batteries in the gauge decided to die. I borrowed one of the non-digital ones from the gas station in order to finish off the last two tires, and it was also pretty much identical with the TPMS.


Title: Re: Believable air gauge?
Post by: RBEmerson on April 29, 2017, 09:41:03 pm
Batteries? In the gauge? Are we talking about the round gauge with a needle and a vent on the hose? Batteries?  :headscratch:


Title: Re: Believable air gauge?
Post by: Sport on April 29, 2017, 11:49:20 pm
Still haven't ventured a buck ninety eight for a pencil gauge at your local Autozone eh? :)


Title: Re: Believable air gauge?
Post by: RBEmerson on April 30, 2017, 09:41:24 am
Did, Gas, to go back for my wasted money, is more than the thing's worth.


Title: Re: Believable air gauge?
Post by: Bounce on April 30, 2017, 10:54:38 am

I bought mine from Amazon.  Basically look for top rated and read the reviews...especially the negative ones.

Odds are if it's a bad gauge, people will give it a bad report.

https://www.amazon.com/gp/product/B0006O2S0U/ref=oh_aui_detailpage_o03_s00?ie=UTF8&psc=1

Under $15 bucks.


That's like the 2 I've been using for a long time. I can get a more consistent reading using them compared to pencil gauges. Part of that is because of the design that allowed a better angle of attack against different kinds of valve stems.


Title: Re: Believable air gauge?
Post by: Canuck on April 30, 2017, 01:25:01 pm

Batteries? In the gauge? Are we talking about the round gauge with a needle and a vent on the hose? Batteries?  :headscratch:


All digital tire pressure gauges have batteries, the little button kind. Something has to power the digital display of the psi. Mine is kind of like this one, http://www.accutiregauge.com/talking-tire-gauge/accutire-ms-4445-b/, except they don't make my exact model anymore.

However, I think I just destroyed my formerly trusty gauge. When I went to install the new batteries I realized the gauge didn't indicate which side was positive, and I'd already removed the old batteries. So I guessed, and the gauge did not work. So I reversed the batteries, and tried again, and now it is way, way off. It tells me that my bike and my car tires are at 90 psi when I know neither of them are anywhere close to that. I assume that installing the batteries backwards did that, so I guess I'll be buying a new tire gauge today.



Title: Re: Believable air gauge?
Post by: PatM on April 30, 2017, 01:39:48 pm
The issue I have with all tire gauges is every time you check your bike's tires, the pressure goes down.
Getting an accurate pressure in the tire is a guesstimate action. Over inflate a bit and check and hope you have the right pressure.
So, if you're off by a few pounds with an inaccurate gauge, does it really matter?
 


Title: Re: Believable air gauge?
Post by: Bounce on May 01, 2017, 09:22:11 am
That's why I like those accugage dials. Over inflate, chuck up, push the button to release air to target psi.


Title: Re: Believable air gauge?
Post by: RBEmerson on May 01, 2017, 10:40:49 am
AoA to tire stems can be frustrating. Bicycle pumps have the right idea, with a way to clamp the hose to the stem. If only someone did the same thing for a gauge and hose. Gee, maybe I should be on Shark Tank or whatever.  :D


Title: Re: Believable air gauge?
Post by: Bounce on May 02, 2017, 09:22:39 am

AoA to tire stems can be frustrating. Bicycle pumps have the right idea, with a way to clamp the hose to the stem. If only someone did the same thing for a gauge and hose. Gee, maybe I should be on Shark Tank or whatever.  :D


I'd never buy one. The gauge is a quick check and either add air or move on. It would hamper the task if a latch was needed.


Title: Re: Believable air gauge?
Post by: RBEmerson on May 04, 2017, 10:43:46 pm
Not needed, but helpful sometimes. Think optional extra.


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