12V air compressor recommendations?

roadie · 19 Oct 2017 at 13:11

Quick thread, can anyone recommend any of the above for topping up tyres? For example Michelin, Ring. I don't want to spend over £50 and would like auto cut off in combination with an accurate gauge for inflation level.

Ta

kmax86 · 19 Oct 2017 at 13:38

I have the RAC635 does the job for top ups although a bit noisy. Pump is accurate when compared to my manual pen pressure gauge. Just have to factor in the air being released when unscrewing.

Wait for black Friday deals iirc mine was around 15 or 20 when I bought it.

MichaelAwkward · 19 Oct 2017 at 19:28

I got the Ring RAC635 recently too for £23. Perfectly fine, auto cutoff is handy and it remembers it.

roadie · 20 Oct 2017 at 09:47

OK cool, that looks like the leader at present. Thank you.

Invertigo · 20 Oct 2017 at 10:28

I have a Ring one from Amazon and it does the job nicely, auto cutoff is useful. I would however prefer one with a push fit valve rather than a screw on one, just because it’s impossible to get the valve off without losing some air. I tend to just compensate now and add 1-2 psi more

lordrobs · 20 Oct 2017 at 11:41

I have the older Ring 600 and it works fine. A push on valve would be nice but the air loss from the screw on one is negligible.

theone8181 · 20 Oct 2017 at 13:10

I have the ring one and its pretty good, nice and easy to change the pressure between front and rear and is pretty quick too.

Stringy · 20 Oct 2017 at 14:38

How much does accuracy matter if you're not driving like you stole it, surely +/- 1 psi or so is accurate enough if you're not losing pressure through a slow puncture or the like? I've got an analogue gauge compressor that came in the wheel well of my Ibiza, probably not the most accurate but seems to do the job.

ShiWarrior · 20 Oct 2017 at 16:17

i use a "Ring 640" its dam fast and it seems solid enough, much better than my Mitchilin i had

lordrobs · 20 Oct 2017 at 16:41

Stringy said:
How much does accuracy matter if you're not driving like you stole it, surely +/- 1 psi or so is accurate enough if you're not losing pressure through a slow puncture or the like? I've got an analogue gauge compressor that came in the wheel well of my Ibiza, probably not the most accurate but seems to do the job.

The accuracy of these is pretty good. The way I look at it is that I'm going to be much nearer book figure using one of these with cold tyres than I am after driving to the nearest petrol station to use their one.

Tomsk · 20 Oct 2017 at 20:25

kmax86 said:
I have the RAC635 does the job for top ups although a bit noisy. Pump is accurate when compared to my manual pen pressure gauge. Just have to factor in the air being released when unscrewing.

Wait for black Friday deals iirc mine was around 15 or 20 when I bought it.

I got fed up with the screw-in connection, so cut it off and replaced it with a clip on one. IIRC I got the replacement from Hellfrauds.

kmax86 · 20 Oct 2017 at 21:18

Screw connector is alright but it can be annoying if you are using it frequently.

ShiWarrior · 20 Oct 2017 at 21:22

kmax86 said:
Screw connector is alright but it can be annoying if you are using it frequently.

yeah no idea why Ring chose to do that, thats the only thing that bugs me with mine, but it is a superb compressor

kmax86 · 20 Oct 2017 at 21:43

Same. Had to add in an extra or 2 psi to compensate while removing the connector. Other than that no complaints really.

Jez · 21 Oct 2017 at 11:51

I have a Ring one as above and it is nice and compact and works fine, comes in a nice little pouch which stores well in the boot. The cord could do with being longer so that it can reach all around the car from one lighter socket but that is a minor complaint.

Deleted member 66701 · 21 Oct 2017 at 12:21

Invertigo said:
I have a Ring one from Amazon and it does the job nicely, auto cutoff is useful. I would however prefer one with a push fit valve rather than a screw on one, just because it’s impossible to get the valve off without losing some air. I tend to just compensate now and add 1-2 psi more

It doesn't lose air from the tyre, it loses air from the compressor hose. When you start unscrewing it the valve on the wheel closes before the hose disconnects, so the hiss you hear is the pressure being released form the hose, not the wheel.

People make the same mistaken assumption for shocks on MTB's.

ShiWarrior · 21 Oct 2017 at 15:32

amigafan2003 said:
It doesn't lose air from the tyre, it loses air from the compressor hose. When you start unscrewing it the valve on the wheel closes before the hose disconnects, so the hiss you hear is the pressure being released form the hose, not the wheel.

People make the same mistaken assumption for shocks on MTB's.

good to know

thanks

chaparral · 21 Oct 2017 at 21:24

On lightning deal https://www.amazon.co.uk/DBPOWER-Co...m=A3P5ROKL5A1OLE&pf_rd_r=6M67KR6BR3MTFPRTREQD

It Not that fast or powerful but it cheap

Tomsk · 22 Oct 2017 at 00:25

amigafan2003 said:
It doesn't lose air from the tyre, it loses air from the compressor hose. When you start unscrewing it the valve on the wheel closes before the hose disconnects, so the hiss you hear is the pressure being released form the hose, not the wheel.

People make the same mistaken assumption for shocks on MTB's.

Probably depends on the tyre valve. I know it lost air from the tyre, because it hissed as I was attaching the connector to the valve.

theone8181 · 22 Oct 2017 at 07:19

Tomsk said:
Probably depends on the tyre valve. I know it lost air from the tyre, because it hissed as I was attaching the connector to the valve.

I agree, there's always a small amount of air lost as until the valve is completely released, it's still open. There's normally a few turns before it closes but if your quick I imagine that it's probably less than half a psi.

12V air compressor recommendations?

Deleted member 66701

Deleted member 66701