|Item Weight||3.98 ounces|
|Product Dimensions||3 x 2 x 0.4 inches|
|Item model number||DEF4PC|
|Is Discontinued By Manufacturer||No|
|Manufacturer Part Number||Def4pc|
Tire Deflator Kit Universal Adjustable Pack of 4
|Price:||$19.95 Get Fast, Free Shipping with Amazon Prime & FREE Returns|
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These are adjustable from 6-30 PSI and are preset about 18 PSI. These are sold in a pack of 4 and include a case for keeping them all together.
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This is how I set deflators for myself and my customers, regardless of brand:
First, setting any delator takes time and patience, so it is a good task to do while you are doing something else on your rig out in the shop.
Set a tire to your desired deflation pressure with a known-accurate, professional dial gauge, the same gauge that you will carry in your rig. These are a good investment compared to the cost of replacing a tire due to an inaccurate pressure reading.
Back the lock nut on the deflator off, then screw the deflator on to the valve stem. Make sure the shop is quiet, put your ear close to the deflator and slowly unscrew the cap until you hear air escape. Screw the the cap back in until no air is escaping. Tighten the lock nut finger tight without turning the cap. Remove the defalator and air the tire back up to road pressure. Re-install the deflator and leave it for a good while until you cant hear any air escaping. This can take 7-8 minutes. Remove the deflator and check the air pressure in the tire. It will probably be within 1-3 psi. from your desired deflation pressure. Carefully loosen the lock nut and adjust the cap. Screw it in clockwise to increase pressure, screw it out counter-clockwise to decrease pressure. It only takes a very small amount of rotation to adjust the valve, 1/16th to 1/8th of a turn to adjust 1 psi. With practice, you will get a feel on how much to turn it. Re-inflate the tire to road pressure and install the deflator. After waiting for it to deflate, recheck the pressure. Re-adjust the cap and repeat until you have reached your exact desired deflation pressure. Once you have all four adjusted, carefully tighten the lock nut with two pair of pliers being careful not to rotate the cap. Retest to verify your final setting.
I have not had any problems, but it would make sense to double check the pressures after using the deflators the first few times on the trail.
Zag's Garage, Glendale AZ
If you’re a person that uses a wide variety of pressure depending on surface , speed etc, this type of deflator is not for you. If you want to go to say 12 lbs every time you go off road with little exception, these will work just fine for you.
The big thing is to not leave them on when driving. Pressure surges from bumps, sticks, rocks, ect will cause a pressure spike and they will burp air every time that happens. So just air down, take them off, replace valve caps, put delayers away ar give them to your buddy to help speed the air down process along.
I wasted a lot of time to get these set up. I finally had them set so I could put them on a tire at the correct pressure and no air would come out. So I figured they were good to go.
When I tested them on full tires, I waited over 10 minutes for them to stop draining air (only going from like 38psi to the set point 30psi). I finally pulled them off and saw they drained the tires to 28psi and were still draining.
The biggest problem is they just start going so slow when they get close to the set point, and they will go past it because they don’t shut off automatically. This past time when I used them it didn’t bother me very much about what exact pressure my tires were at. These were set to 30 and they got me to 33 before I pulled them off because I don’t have all day and I don’t trust them to stop at 30.