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Wheel Masters 4-Hose Inflation Kit - 22-1/2" - 24" Dually - Hub Mount
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Wheel Masters

Wheel Masters 4-Hose Inflation Kit - 22-1/2" - 24" Dually - Hub Mount

Part Number: WM8004
327 Reviews | 12 Questions
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$61.82
Retail:$83.16
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Stainless-steel-wrapped hoses take the hassle out of inflating and checking the air pressure of dual tires. Kit is designed for steel or aluminum rear wheels with wheel liners. Hardware included. Great Prices for the best tire inflator from Wheel Masters. Wheel Masters 4-Hose Inflation Kit - 22-1/2" - 24" Dually - Hub Mount part number WM8004 can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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Wheel Masters Tire Inflator - WM8004

  • Dually Vehicles
  • Inflation Kit
  • 22-1/2 Inch Dual Tires
  • Wheel Masters

Stainless-steel-wrapped hoses take the hassle out of inflating and checking the air pressure of dual tires. Kit is designed for steel or aluminum rear wheels with wheel liners. Hardware included.


Features:

  • Inflation kit lets you easily check air pressure and inflate your vehicle's dually tires
    • Relocates inner tire's valve stem to outer wheel and extends valve stem on outer tire
    • No crawling on the ground or reaching for valve stem on inner tire
  • Stainless-steel-wrapped, 2-ply rubber tubing with nylon braiding
    • Durable wrapping helps prevent hoses from cracking or leaking
  • Simple hub-mount installation with included hardware
    • Hoses attach to valve stems on inner and outer tires
    • Brackets mount on steel or aluminum rear wheels with wheel liners
  • 4 Hoses included
  • Made in the USA


Specs:

  • Application: inner and outer tires on 22-1/2" - 24" dual wheels
  • Overall length of hoses with straight valve extenders: 15"
  • Length of hoses with 90-degree-angled extenders from end of valve to 90-degree bend: 10-1/2"
  • 1-Year warranty


Checking and maintaining proper tire pressure is important for ensuring a safe, smooth ride and maximizing fuel economy, but it can be a real pain with dually tires. The Wheel Masters inflation kit takes the hassle out of checking air pressure and inflating your dual tires.


Two hoses extend the valve stem location of the inner tires to the outer wheels. This means no more crawling around on the ground or blindly reaching for the valve stem on the inner tire. Two 90-degree hoses are also included to make it easier to access the valve stems of the outer tires. And the stainless steel wrapping on the hoses helps prevent them from cracking or leaking.


Hub-Mount Installation

Inflation Hose Kit Hub Mount

The dually inflation kit is designed for steel or aluminum rear wheels with wheel liners.


  1. Install 2 of the included brackets on the hub of each outer wheel. Make sure to align the brackets with the valve stem and a hand hole.
  2. Attach the hoses with straight valve extenders to the valve stems on the inner tires.
  3. Attach the hoses with 90-degree-angled extenders to the valve stems on the outer tires.
  4. Run the hoses to the outer wheels and attach the hoses to the hub-mounted brackets.
  5. Screw on the valve caps.


8004 Dual Tire Inflators by WheelMasters - 22.5" - 24" Dual Wheels - 4 Hoses - Hub Mount - Stainless Steel

Replaces RMT8004







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Customer Satisfaction Score:

Ratings & Reviews

4.6

327 reviews
5 Stars
(251)
4 Stars
(48)
3 Stars
(15)
2 Stars
(8)
1 Star
(5)
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by:
They didn't have the item in stock so I had to wait for it to be shipped direct from the factory other than that item was heavier duty than one I bought from Amazon that leaked from the get go I have always had good results with dealing with etrailer
Steve profile picture

Steve

1/29/2026

These are great its been a year and I still dont have any leaks i have them on a class a diesel pusher motorhome I would buy again makes it a lot easier than having to crawl under it and get a air gauge between duals

by:
The product is exactly what I ordered, great quality and fit. The shipping dates seemed long but after contacting etrailer they were sent out in time to be installed before I have to leave town.
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by:
I bought 2 sets as I have a tag axle and a dually axle. Took them to the installation guy and he was very happy with the quality of these.
by:
Purchased the Wheel Master valve stem extenders to the replace the original Wheel Master extenders that came with the motorhome from the manufacturer when purchased it, at the time, 15 years ago. Hoping to get another 15 years of service out of these new ones. Only issue was the box etrailer put the product in was to small and the original packing was folded or bent to fit the shipping box, causing the OEM packaging to break open. Several of the small parts were lost in the shipping. Luckily the old parts on the motorhome wheel simulators were still usable.
Mike H. profile picture

Mike H.

7/23/2020

Still working as expected. Makes checking and putting air in the tires so much easier

by:
Just what I needed for my motorhome. These flexible hoses wear out just like anything, and I recently put new tires on my coach so I knew it was time for new valve extensions as well. Make sure you get them installed tightly so they don't leak. Easier said than done on the inside dual tire, you'll need to get under the coach likely to be able to get to it with pliers from the backside. My only recommendation would be to buy the extensions BEFORE installing new tires and have the tire shop install the new extensions with the new tires. I'm not as young and flexible as these valve extensions, so installation wasn't as easy as it would have been 20 years ago.
Dave profile picture

Dave

3/12/2021

Still working well after a year. I did have one that was slowly leaking, 3-4 pounds over a week. I tightened it up and the leak stopped. Dont assume they stay tight because you put them on tight. Still very happy with the purchase.

by:
Items appear to be well made, but the 90 was not long enough for my 22.5" rims. Not sure why they send such short ones. Measure carefully. Now I have two that are worth anything and won't fit on any wheels. :(
by:
The Wheel Master hoses appear to be excellent quality; however, they do not connect well to the 22 1/2” wheels on our motorhome
Perhaps the metal valves on the tires are not standard
Was able install the inner hoses with difficulty but the 45 degree connections for the outer wheel can not be used
Jenny N. profile picture
Etrailer Expert

Jenny N.

2/20/2024

I hate to hear that the extenders are unable to be installed. Would you be able to send a picture of the wheels and how the extenders will not fit> I will reach out to the manufacturer to help you.

by:
The extenders are much better than the cheaper versions. They installed well with clear instructions.
by:
These are on a 1998 Jamboree and have been working flawlessly for a year. So glad I bought them!
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by:
Product is of excellent quality and still doing it’s job. Makes checking tire pressure much easier. I am soon to be 71, female and drive a 38 foot deisel pusher!
Kj profile picture

Kj

4/12/2020

Still working great a year later. Well worth the investment.

by:
Parts arrived overnight delivery. Couldn't find them local at all. etrailer had them in stock! Perfect for 22.5 dual wheels. Had them installed on my Motorhome to replace the 15 year old ones. Had new valve stems installed also. Quality work done by Round Rock Texas, Goodyear commercial tire shop. Not cheap, but beats being stuck on the side of the road
by:
I was glad to find the etrailer carried the product I was having trouble finding. Delivery was prompt with complete tracking details just one click away. I will definitely keep you in mind next time I have trailer/towing needs.
by:
These value extenders were exactly what I was looking for. I accidently made a keypunch error and the product was returned to the send. When I contacted them, the immediatley cancelled the orginal order and set up a new one with the key error corrected and I got shipment soon after. Great Customer Service
by:
Came with my other order..fast ordering and delivery. Inexpensive shipping shared with my other order.
Etrailer is consistently the best.
by:
I put inflator kit on my Motor home, work great .Delivered when Noah said they would be . Great service . Will shop with etrailer again .
by:
Worked great to replace the written out extensions on our motorhome with 22" tires.
by:
shipping was way to long needed parts for my motorhome to go on vacation fixed my old ones cause my order to forever to get
by:
Used this product before on motor homes. Best valve extensions ojt there. E-trailer had it in stock at a good price and shipped it immediately. Would buy from them again.
by:
Worked as advertised no problems. Shipping was fast as always
by:
The product description was accurate and it met my expectations.
Shipping was very prompt and communication of my order status was very good.
by:
I am very pleased with these tire inflators. The product is well made And the price was not outrageous. Order was filled in a reasonable time. I would definitely order from this company again.
by:
Product is as advertised. Good length of threaded ends for adding on TPMS sensors.
by:
The only problem is I need an 90 degree extension to work.
by:
They don't appear to be the same quality as my 13 year old Wheel Master hoses.
One year warranty?
by:
Even though I only needed one extender to replace a faulty one, it was worth the money to buy this better quality one piece extender.
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