bing tracking image
  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: $54.42
You Save: 24%
Tire Inflator
Shipping Weight: 1.14 lbs
Add to cart
In Stock
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

Customer Photos

Need help with installation?
Locate installers near me
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 or call 1-800-940-8924 for expert service.
  • All Info
  • Reviews (35)
  • Q & A (0)
  • Photos

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   (35 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 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

Etrailer Expert

Jenny N.


I hate to hear that the extenders have been 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.


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.


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


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.


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


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.


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


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.


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


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.


Exactly as described by sales rep Quinn. Very helpful.


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.


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


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


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


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.


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


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


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


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.


fit perfectly, no leaks



Great, no problems


Worked as advertised no problems. Shipping was fast as always


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


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


quality item super fast shipper good to do business with


product as advertised shipped very quic k.

Show More Reviews

See what our Experts say about this Wheel Masters Tire Inflator

Do you have a question about this Tire Inflator?

Info for this part was:

Employee Leah B
Edited by:
Leah B
Employee Jackie C
Expert Research:
Jackie C
Employee Jameson C
Expert Research:
Jameson C
Employee Jeff D
Installed by:
Jeff D
Employee David F
Installed by:
David F
Employee David L
Written by:
David L
Employee Jacob T
Video Edited:
Jacob T
Employee Adele M
Updated by:
Adele M
Employee Laura H
Updated by:
Laura H
Employee Wilson B
Updated by:
Wilson B
Employee Dustin K
Video by:
Dustin K
Employee Jonathan Y
Video by:
Jonathan Y
Employee Kevin C
Test Fit:
Kevin C

At we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.

Product Experts Available Now!
Call 1-800-940-8924