portable air compressors for tires

Get all your technical information about electric bikes here.
User avatar
gogo   10 MW

10 MW
Posts: 2429
Joined: Mar 17 2008 2:20pm
Location: Iowa USA

Re: portable air compressors for tires

Post by gogo » Mar 06 2018 11:33am

There's a video around of someone who used a stripped down compressor by pressing the gear wheel against his tire. Those compressors get hot though, so you'd want to keep enough of the enclosure to insulate the hot bits.
"A conclusion is the place where you got tired of thinking." -Steven Wright

User avatar
tomjasz   1.21 GW

1.21 GW
Posts: 3844
Joined: Mar 29 2014 1:45pm
Location: Out riding, MN USA
Contact:

Re: portable air compressors for tires

Post by tomjasz » Mar 06 2018 1:39pm

When I rode Vespa GTS250 scooters I carried a "CyclePump" and incredible little compressor, but limited to 12V and quite expensive.
The aluminum case is less than 2″ high x 4″ wide x 6″ long
I sold it with my scooter and scooter tools. So far I've avoided a DCDC device, even though I have one. I prefer riding with one less device to manage. That said if anyone wants one of the best 12V compressors and is willing to spend $110 for it's very compact size...this is the one!


July 18 2017: Motorcycle Consumer News awarded the CyclePump their “Top Choice Award” in a shoot-out with 6 other tire inflators. https://bestrestproducts.com/wp-content ... -JCW-1.pdf
Attachments
Screen Shot 2018-03-06 at 12.30.03 PM.png
Thanks Justin_le we're here thanks to you. All the best to the mods for their tireless work keeping it on an even keel.

User avatar
alsmith   100 kW

100 kW
Posts: 1182
Joined: Dec 03 2010 7:25pm
Location: Northumberland, UK

Re: portable air compressors for tires

Post by alsmith » Mar 07 2018 3:07pm

OK, just been offered a refund from banggood, I guess it's an admittance that it's a 12V item. I think it will go to my brother as an emergency option for his car (but I AM tempted to put 48V through it ....)
So back to the original hunt for a cheap emergency compressor...

I have to say that I'm reasonably happy with Bangggood but a little disappointed/annoyed too. When I originally contacted them about the problem I included pictures clearly showing the problems yet they mustn't read the initial messages because they asked for a video of the problem. All I did in response was ask what a video would show that they didn't already have, added a couple of extra bits of mildly sarcastic captions, and say if they really did want the video what was the extra things that they wanted me to show that the pictures didn't have.

User avatar
Alan B   100 GW

100 GW
Posts: 7486
Joined: Sep 11 2010 7:43am
Location: San Francisco Bay Area, USA
Contact:

Re: portable air compressors for tires

Post by Alan B » Mar 07 2018 5:04pm

The video of high RPM and smoke might be entertaining.

I expect Lunacycle has the right voltage units.

dilkes   100 W

100 W
Posts: 164
Joined: Apr 11 2012 7:51am
Location: Toronto, Ontario, Canada

Re: portable air compressors for tires

Post by dilkes » Mar 08 2018 10:37pm

alsmith wrote:
Mar 07 2018 3:07pm
OK, just been offered a refund from banggood, I guess it's an admittance that it's a 12V item. I think it will go to my brother as an emergency option for his car (but I AM tempted to put 48V through it ....)
So back to the original hunt for a cheap emergency compressor...

I have to say that I'm reasonably happy with Bangggood but a little disappointed/annoyed too. When I originally contacted them about the problem I included pictures clearly showing the problems yet they mustn't read the initial messages because they asked for a video of the problem. All I did in response was ask what a video would show that they didn't already have, added a couple of extra bits of mildly sarcastic captions, and say if they really did want the video what was the extra things that they wanted me to show that the pictures didn't have.
Thanks for the update. I had ordered one as well, but have not received it yet. I assume it will be the same issue so I will also go for a refund or replacement.

If you do get "brave" and put 48V through the unit, I'd be interested in what happens!

Here's one, also from Banggood that is not quite as inexpensive, but definitely works at 48V -- a friend of mine bought one.
https://www.banggood.com/Wholesale-12V- ... rehouse=CN

User avatar
fechter   100 GW

100 GW
Posts: 12926
Joined: Dec 31 2006 3:23pm
Location: California Bay Area, USA

Re: portable air compressors for tires

Post by fechter » Mar 08 2018 10:46pm

dilkes wrote:
Mar 08 2018 10:37pm

Here's one, also from Banggood that is not quite as inexpensive, but definitely works at 48V -- a friend of mine bought one.
https://www.banggood.com/Wholesale-12V- ... rehouse=CN
That looks like the same model I have. Works great on my 52v pack.
"One test is worth a thousand opinions"

User avatar
tomjasz   1.21 GW

1.21 GW
Posts: 3844
Joined: Mar 29 2014 1:45pm
Location: Out riding, MN USA
Contact:

Re: portable air compressors for tires

Post by tomjasz » Mar 08 2018 11:29pm

Came today $14, $10 less than USA source with no better warranty. Box had slections for 12, 24, 48, and 60v versions. Mine was checked off as 48v. I’ll add add a xt60, xt90, and Anderson adapter (diy 3 way) to cover all batteries i own.
Attachments
C78FF67A-2ABC-4E4A-87E1-EFAC6FD2FD91.jpeg
Thanks Justin_le we're here thanks to you. All the best to the mods for their tireless work keeping it on an even keel.

User avatar
tomjasz   1.21 GW

1.21 GW
Posts: 3844
Joined: Mar 29 2014 1:45pm
Location: Out riding, MN USA
Contact:

Re: portable air compressors for tires

Post by tomjasz » Mar 08 2018 11:37pm

alsmith wrote:
Mar 07 2018 3:07pm
OK, just been offered a refund from banggood, I guess it's an admittance that it's a 12V item. I think it will go to my brother as an emergency option for his car (but I AM tempted to put 48V through it ....)
So back to the original hunt for a cheap emergency compressor...

I have to say that I'm reasonably happy with Bangggood but a little disappointed/annoyed too. When I originally contacted them about the problem I included pictures clearly showing the problems yet they mustn't read the initial messages because they asked for a video of the problem. All I did in response was ask what a video would show that they didn't already have, added a couple of extra bits of mildly sarcastic captions, and say if they really did want the video what was the extra things that they wanted me to show that the pictures didn't have.
Based on unit I recieved they messed up the choice in their shipping department. Mine is clearly marked 48v.
Thanks Justin_le we're here thanks to you. All the best to the mods for their tireless work keeping it on an even keel.

User avatar
Alan B   100 GW

100 GW
Posts: 7486
Joined: Sep 11 2010 7:43am
Location: San Francisco Bay Area, USA
Contact:

Re: portable air compressors for tires

Post by Alan B » Mar 09 2018 9:52am

It would be interesting to know if the motor is different or if there's a regulator module added on the 48-72V units.

User avatar
alsmith   100 kW

100 kW
Posts: 1182
Joined: Dec 03 2010 7:25pm
Location: Northumberland, UK

Re: portable air compressors for tires

Post by alsmith » Mar 09 2018 1:03pm

I'd be interested to know about the motor inside the unit- if it is marked as 12V or 48V? Mine has no additional circuitry inside- the 12V cigarette lighter is connected directly to the motor.

User avatar
Alan B   100 GW

100 GW
Posts: 7486
Joined: Sep 11 2010 7:43am
Location: San Francisco Bay Area, USA
Contact:

Re: portable air compressors for tires

Post by Alan B » Mar 09 2018 1:53pm

In fechter's photo on page 1 the wires appear to come straight out of the motor, so it would appear to be a higher voltage winding rather than electronics. Perhaps fechter will confirm this, as the complete wire path is not clear, but if there were some electronics the wire routing would likely have been different.

User avatar
tomjasz   1.21 GW

1.21 GW
Posts: 3844
Joined: Mar 29 2014 1:45pm
Location: Out riding, MN USA
Contact:

Re: portable air compressors for tires

Post by tomjasz » Mar 09 2018 5:17pm

I’ll open mine tonight and post pictures.
Thanks Justin_le we're here thanks to you. All the best to the mods for their tireless work keeping it on an even keel.

User avatar
Alan B   100 GW

100 GW
Posts: 7486
Joined: Sep 11 2010 7:43am
Location: San Francisco Bay Area, USA
Contact:

Re: portable air compressors for tires

Post by Alan B » Mar 09 2018 11:42pm

Why does the Bangood unit have red on the gauge from 30 to 45 psi or so??

The small Ryobi was only $19.95 at Home Depot, and is very ergonomic, shaped like a drill. They have a larger one as well, too large. But it requires their 18V lithium tool battery. It is much smaller than many others, though it is not as small as it could be, internally they are all pretty much a motor, some gears and a piston with a couple of one-way valves. The Ryobi has a much better than average gauge. It is really excellent around the house and vehicle. It is a bit larger than I'd like to carry on the bike, but it is within the range that it could be.

The imported unit that Lunacycle and Bangood carry is smaller if it is cut down as fechter and others have done. If I had one I'd design a 3D printed case for it instead of hacking on the plastic, but whatever works. Apparently the motor is wound for 48V instead of 12V, and Lunacycle indicates 72V max. I wonder how it operates on a fully charged 72V battery up around 80V? Might be really fast. :)
Attachments
RyobiPump.PNG

User avatar
amberwolf   100 GW

100 GW
Posts: 25141
Joined: Aug 17 2009 6:43am
Location: Phoenix, AZ, USA, Earth, Sol, Local Bubble, Orion Arm, Milky Way, Local Group
Contact:

Re: portable air compressors for tires

Post by amberwolf » Mar 10 2018 2:08am

Alan B wrote:
Mar 09 2018 11:42pm
Apparently the motor is wound for 48V instead of 12V, and Lunacycle indicates 72V max. I wonder how it operates on a fully charged 72V battery up around 80V? Might be really fast. :)
Maybe the high end of the range is for the big staypuft marshmallow man? ;)

User avatar
tomjasz   1.21 GW

1.21 GW
Posts: 3844
Joined: Mar 29 2014 1:45pm
Location: Out riding, MN USA
Contact:

Re: portable air compressors for tires

Post by tomjasz » Mar 10 2018 5:19pm

Closeups of 48V
Attachments
Screen Shot 2018-03-10 at 4.15.11 PM.png
Component?
Screen Shot 2018-03-10 at 4.14.42 PM.png
Clearly marked 48v
Last edited by tomjasz on Mar 11 2018 8:29am, edited 1 time in total.
Thanks Justin_le we're here thanks to you. All the best to the mods for their tireless work keeping it on an even keel.

User avatar
tomjasz   1.21 GW

1.21 GW
Posts: 3844
Joined: Mar 29 2014 1:45pm
Location: Out riding, MN USA
Contact:

Re: portable air compressors for tires

Post by tomjasz » Mar 10 2018 6:18pm

Alan B wrote:
Mar 09 2018 11:42pm
Why does the Bangood unit have red on the gauge from 30 to 45 psi or so??


I looked back and saw none with red for 30-45?
Mine, and Fechter's has a red scale for BAR.
Thanks Justin_le we're here thanks to you. All the best to the mods for their tireless work keeping it on an even keel.

User avatar
alsmith   100 kW

100 kW
Posts: 1182
Joined: Dec 03 2010 7:25pm
Location: Northumberland, UK

Re: portable air compressors for tires

Post by alsmith » Mar 11 2018 4:42am

Alan B wrote:
Mar 09 2018 11:42pm
...

The small Ryobi was only $19.95 at Home Depot, and is very ergonomic, shaped like a drill. They have a larger one as well, too large. But it requires their 18V lithium tool battery. It is much smaller than many others, though it is not as small as it could be, internally they are all pretty much a motor, some gears and a piston with a couple of one-way valves. The Ryobi has a much better than average gauge. It is really excellent around the house and vehicle. It is a bit larger than I'd like to carry on the bike, but it is within the range that it could be.

...
That's what I wanted but not at the cost over here- even imports end up around four times as much, and then if it's spotted by customs it would be duty, then our vat at 19% on top of it.

User avatar
Alan B   100 GW

100 GW
Posts: 7486
Joined: Sep 11 2010 7:43am
Location: San Francisco Bay Area, USA
Contact:

Re: portable air compressors for tires

Post by Alan B » Mar 11 2018 10:29am

Local taxes and protectionism are a different problem. We should probably avoid that discussion.

I saw the red gauge on the Bangood 48V unit, probably just a different version of the colored scale on the other units. Not sure what it is for but probably just a typical pressure range for vehicle tires.

While reviewing the thread just now I see that fechter posted more photos of his unit on page 1 that clearly show the full contents and no electronics were evident. The new partial photo showed a diode only.

It is much cheaper to wind the motor for 48V than to make electronics that can handle the motor's surge currents.
Attachments
48VcompressorGauge.PNG

User avatar
fechter   100 GW

100 GW
Posts: 12926
Joined: Dec 31 2006 3:23pm
Location: California Bay Area, USA

Re: portable air compressors for tires

Post by fechter » Mar 11 2018 11:33am

Alan B wrote:
Mar 11 2018 10:29am
While reviewing the thread just now I see that fechter posted more photos of his unit on page 1 that clearly show the full contents and no electronics were evident. The new partial photo showed a diode only.
Mine had a diode also. It would prevent it from running if you reversed the polarity, though with a brushed motor it could still run if reversed but maybe the brush timing favors one direction.
"One test is worth a thousand opinions"

User avatar
tomjasz   1.21 GW

1.21 GW
Posts: 3844
Joined: Mar 29 2014 1:45pm
Location: Out riding, MN USA
Contact:

Re: portable air compressors for tires

Post by tomjasz » Mar 11 2018 12:21pm

Alan B wrote:
Mar 11 2018 10:29am
The new partial photo showed a diode only.

Alan,

Oops, I guess I missed the blue picture. But wouldn't that be the normal, or common vehicle tire range?

FWIW No other electronics were evident. Why (I'm an electronics dullard) does the motor need a diode to limit flow in one direction?

Now that I see the space available I'm wondering how long 12V in 18650 batteries will fit in the 12V version and how long they would last? Any guesses 3p3s might fit.

Thanks for the comments!

T
Thanks Justin_le we're here thanks to you. All the best to the mods for their tireless work keeping it on an even keel.

User avatar
Alan B   100 GW

100 GW
Posts: 7486
Joined: Sep 11 2010 7:43am
Location: San Francisco Bay Area, USA
Contact:

Re: portable air compressors for tires

Post by Alan B » Mar 11 2018 5:03pm

The 18V tool batteries are 5S1P and run the 18V compressor quite a while, I would think that 3S2P should be good. Even 3S1P will probably be adequate for the 12V models if you keep them well charged.

User avatar
alsmith   100 kW

100 kW
Posts: 1182
Joined: Dec 03 2010 7:25pm
Location: Northumberland, UK

Re: portable air compressors for tires

Post by alsmith » Mar 11 2018 10:06pm

i've just seen an aliexpress offer, but only 4 hours to go. Throttle with keyswitch and voltage display at £5.99 0r $8.13 delivered

User avatar
Alan B   100 GW

100 GW
Posts: 7486
Joined: Sep 11 2010 7:43am
Location: San Francisco Bay Area, USA
Contact:

Re: portable air compressors for tires

Post by Alan B » Mar 12 2018 9:28am

Which would seem to have nothing to do with this thread.

User avatar
eCue   10 kW

10 kW
Posts: 631
Joined: Nov 03 2017 5:14pm
Location: Vancouver Island , Canada

Re: portable air compressors for tires

Post by eCue » Mar 12 2018 11:36am

Unless you use it for a compressor on switch :D
Solar charge station on wheels join the Revolution

User avatar
Alan B   100 GW

100 GW
Posts: 7486
Joined: Sep 11 2010 7:43am
Location: San Francisco Bay Area, USA
Contact:

Re: portable air compressors for tires

Post by Alan B » Mar 12 2018 2:39pm

We're still waiting for the video of the 12V compressor running on 48+ volts.

Post Reply