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  1. Tire Inflator
  2. Wheel Masters
  3. Inflation Kit
  4. 22-1/2 Inch Dual Tires
  5. Hub Mount
Wheel Masters 4-Hose Inflation Kit - 22-1/2" - 24" Dually - Hub Mount

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

Item # WM8004
Our Price: $62.41
You Save: 12%
Tire Inflator
This item qualifies for Free Shipping
Shipping Weight: 1.17 lbs
In Stock
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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. Lowest 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 or call 1-636-306-4830 for expert service.
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  • Reviews (31)
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Wheel Masters Tire Inflator - WM8004

  • Inflation Kit
  • Wheel Masters
  • 22-1/2 Inch Dual Tires
  • Hub Mount

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.


  • 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


  • 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

Customer Satisfaction Score:

Customer Reviews

Wheel Masters 4-Hose Inflation Kit - 22-1/2" - 24" Dually - Hub Mount - WM8004

Average Customer Rating:  4.8 out of 5 stars   (31 Customer Reviews)

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.


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.


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


These are on a 1998 Jamboree and have been working flawlessly for a year. So glad I bought them!


Came with my other ordering and delivery. Inexpensive shipping shared with my other order.
Etrailer is consistently the best.


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


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.

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.
Dave - 03/12/2021


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.

Still working as expected. Makes checking and putting air in the tires so much easier
Mike H - 07/23/2020


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.


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!

Still working great a year later. Well worth the investment.
Kj - 04/12/2020


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.


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.


Product is as advertised. Good length of threaded ends for adding on TPMS sensors.


I put inflator kit on my Motor home, work great .Delivered when Noah said they would be . Great service . Will shop with etrailer again .


Worked great to replace the written out extensions on our motorhome with 22" tires.


They don't appear to be the same quality as my 13 year old Wheel Master hoses.
One year warranty?


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


Worked as advertised no problems. Shipping was fast as always


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.


quality item super fast shipper good to do business with


fit perfectly, no leaks

Great, no problems
Ron - 02/10/2020


The product description was accurate and it met my expectations.
Shipping was very prompt and communication of my order status was very good.


Lightening fast shipping! Exactly what I ordered. Doesn’t get much better than that.


As described, best price I could find by far, and quick delivery.


product as advertised shipped very quic k.


Great product that works like it should.

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Info for this part was:

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