1. Tire Inflation and Repair
  2. Wheel Masters
  3. Tire Inflation
  4. 4 Pack
  5. Inflation Kit
  6. 22-1/2 Inch Dual Tires
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
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Tire Inflation and Repair
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Shipping Weight: 1.18 lbs
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Wheel Masters Inflation Kit Tire Inflation and Repair - WM8004
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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 inflation and repair 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 800-298-8924 for expert service.
  • All Info
  • Reviews (20)
  • Q & A (4)
  • Videos (2)
  • Photos
  • Why etrailer?

Wheel Masters Tire Inflation and Repair - WM8004

  • Tire Inflation
  • 4 Pack
  • 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

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

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.

Video Transcript for Wheel Masters 4-Hose Inflation Kit Review

Hi there, dually owners. Today, we're going to be taking a look at Wheel Masters tire inflation kit.These would be great for you RVs and even your larger trucks 'cause when you have dual tires, typically, your valve stems are in difficult to access locations, and, sometimes, you even have to remove the wheels just to check the pressure and inflate it.But with this kit, our valve stems are extended and brought out onto the side of our hub, making them easy to access, so we can ensure that our tires are inflated properly at all times.This way, you can ensure you and your passengers are going to be safe on your long travels without having to get out, crawl on the ground, or take the wheels off just to make a check.The hoses themselves have a stainless steel braiding, which is going to ensure they're very durable, so they'll stand up to any debris that might bounce up on them on the road. The stainless steel means that they're going to be rust-free, so you're going to have corrosion resistance. It's going to last a long time.The hub-mount design is going to be more permanent and more stable than your wheel-mounted designs. They just clip on and spring load into place. The bracket's securely mounted to the hub using rivets.

This is going to keep it nice and solid, much more than your wheel-mounted ones would be. This can be a real benefit when going to inflate your tires because the bracket's going to hold it nice in place, but you have to push kind of hard with your air chuck to get air to go in it.The kit comes with four hose extensions. You'll receive two straight and two bent, with either your 90 or 135 degrees. This combination will allow you to adapt to various wheel shapes and valve stem locations that are on your wheel. Some wheels have the outer rim, like we have here, with a valve stem that's pointed in towards one of the holes, where one of these would really be necessary in order to inflate it.Your inner tire is always going to be difficult to access on a dual rim, just because the stem is on the other side, and often you can't reach between the two tires to inflate them, so that extra length is really going to help.That completes our look at Wheel Masters 4-hose inflation kit..

Customer Reviews

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

Average Customer Rating:  4.9 out of 5 stars   (20 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.

- WM8004

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. 719092

- WM8004

They don't appear to be the same quality as my 13 year old Wheel Master hoses. One year warranty? 285885

- WM8004


- WM8004

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. 765323

- WM8004

I put inflator kit on my Motor home, work great .Delivered when Noah said they would be . Great service . Will shop with etrailer again . 675180

- WM8004

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. 673917

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


- WM8004

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! 621832

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


- WM8004

fit perfectly, no leaks 603686

Great, no problems
Ron - 02/10/2020


- WM8004

Great product that works like it should. 510354

- WM8004

Worked as advertised no problems. Shipping was fast as always 366152

- WM8004

Worked great to replace the written out extensions on our motorhome with 22" tires. 345822

- WM8004

Product is as advertised. Good length of threaded ends for adding on TPMS sensors. 329539

- WM8004

Fast shipping 317481

- WM8004

The product description was accurate and it met my expectations. Shipping was very prompt and communication of my order status was very good. 214555

- WM8004

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. 204416

- WM8004

As described, best price I could find by far, and quick delivery. 176934

- WM8004

quality item super fast shipper good to do business with 166498

- WM8004

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 151946

- WM8004

product as advertised shipped very quic k. 127193

- WM8004

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. 78537


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Info for this part was:

Edited by:
Leah B
Expert Research:
Jackie C
Expert Research:
Jameson C
Installed by:
Jeff D
Installed by:
David F
Written by:
David L
Video Edited:
Jacob T
Updated by:
Adele M
Updated by:
Laura H
Updated by:
Sarah W
Video by:
Dustin K

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