Accessories and Parts
These easy-to-use adapters let you mount round and square bar carriers and accessories on Yakima CoreBar and JetStream crossbars. Brackets use your accessory's existing hardware - no tools required.
Video of Mighty Mount 39H Accessory Adapter for Yakima CoreBar and JetStream Crossbars - Qty 4
Average Customer Rating: 4.7 out of 5 stars (14 Customer Reviews)These easy-to-use adapters let you mount round and square bar carriers and accessories on Yakima CoreBar and JetStream crossbars. Brackets use your accessory's existing hardware - no tools required.
I have a 30+ year old Thule tandem rack. I was determined not to shell out another $xxx+ to buy a new one, just because I wanted to convert from the Thule square crossbars to aero bars. After conferring with an eTrailer expert about mighty mount load limitations, I purchased these mounts instead of trying to rig my own solution. I’m using all four mighty mounts to attach a Thule tandem rack onto Yakima Corebars. My Yakima rack system is attached to my truck via the t-slot rails on a RetraxPro XR tonneau bed cover. With the Corebars sitting on Skyline towers, the mighty mounts serve as a perfectly flat platform for the mounting plates on the tandem rack. I attached the tandem rack to the four mighty mounts using 2 ½ inch by ¼ inch Grade 8 hex cap course screws, some fender and flat washers, and a nylon insert lock nut; all purchased from my local hardware store. I did need to tilt the Corebars forward with the Skyline tower adjusters to level the mighty mount top surface. No issues with turbulence noise. Total load on the four mighty mounts totals 70 lbs including both the rack and tandem bike. Thanks etrailer for the advice, the parts, and the great customer service!
Works great to fit our 2016 Town and Country roof top bars to my hilly rollers kayak carrier!
I used these to adapt an old Yakima rack to my Subaru Outback roof rack cross bars.
Getting these to work with the older rack saved us some serious money.
It was a struggle getting (Global parts shortage) these but the Etrailer team made it happen..
The mighty mounts fir perfectly on my rack system... excellent quality... speedy shipping as well. Looking forward to mounting my kayak system before summer.
Easy, solid conversion that allows us to continue using all of our old carriers on our new rack. Perfect for kayak cradles.
Great service; order arrived 5 days before expected delivery date.
Shipping was extremely quick and packaged well. Product works great on crossbars.
Excellent shipping and tracking coordination. Product delivered as represented and performs as expected.
Thank you Adam E for the excellent communications. Great transaction with fast shipping.
Accessories and Parts
Universal MightyMounts are a simple and economical way to adapt most Yakima carriers to almost any factory roof-rack crossbars. MightyMounts are specifically designed to fit popular factory racks and install easily with no tools.
Video of Universal MightyMounts for Yakima Roof Mounted Accessories
Average Customer Rating: 4.8 out of 5 stars (45 Customer Reviews)Universal MightyMounts are a simple and economical way to adapt most Yakima carriers to almost any factory roof-rack crossbars. MightyMounts are specifically designed to fit popular factory racks and install easily with no tools.
I had old Yakima Powerhounds mounted on round bars, but need to mount them on the factory bars of my new Crosstrek. These Universal MightyMounts saved me from buying a new ski add-on. Only drawback I can see is the system doesn’t lock to the car like when I had them mounted to my round bars. However, I usually view the rack as a means of transport rather than storage.
etrailer.com’s customer service was solid. I made the purchase around April, but due to the part being back ordered, did not revive them until August. etrailer.com emailed me updates about once a month until I received my order.
This product was awesome in allowing me to mount an older tandem bike rack onto the factory Audi Q7 roof rack. Held our road tandem with no issues during 1000 miles at highway speeds (I.e. 80 mph). Slight concern that rubber pads wilm go missing over time.
Product is as presented. Etrailer did great job identifying what I need and getting it to be timely (earlier than expected).
We decided to try out skiing as a family this year. I haven’t skied in 20 years. These worked perfectly for attaching my circa 2000 era Yakima Powderhounds to Thule Aeroblade cross bars on our minivan. These mounts are pricey, but I’m so glad I didn’t have to buy a new ski rack!
The mounts fit almost flush to the top and bottom of the cross bars and there’s no play when properly tightened down. The mounts come with two bails, I used the A one and clipped it into the lower hinge on the backbone. YMMV but you want the top and bottom hinges to conform to the shape of your cross bar as best as possible.
If you find the adapter hard to install into the powderhound, start towards the middle of the ski rack, twist them into place, then slide towards the end and line up the holes.
Minus one star because these are so ugly (the opening of the clamp facces forward) and definitely not aerodynamic, but roof rack attachments rarely are. Function is more important here and these universal mighty mounts definitely get a 100% there!
Shipping was fast and good communication from the etrailer folks throughout the whole transaction.
Perfect adapters for my 2018 Toyota RAV4! Installed Hullyrollers and Mako Saddles on them. Worked great on the Toyota factory racks.
It’s truly universal, lots of options are included.
very good for multiple style crossbars
they are plastic but seem well made
i am using them on Hully Rollers and Saddles which required
some ingenuity to make them work but in the end work well
ETrailers were honest about delay is supplu chain
Having said that there time estimate and delivery were spot on
i am ordering a second set for use with my second kayak
Worked great for attaching my vintage Yakama Lockjaw to the new aero bars on my 2018 Subaru Impreza.
Works well with my Subaru factory cross bars.
I have oval Rhino cross rails on my car. I have an old Yakima standup bike carrier. This product brings the two together perfectly.
I searched the internet trying to understand what I needed to convert my Yakima Hullraisers and Lockjaw to work with my new Subaru Outback. My old set up worked on round Yakima crossbars. The internet was not clear at all about whether there was a workable conversion to the built in crossbars of the Outback. Finally I etrailer and talked to Jordan. He contacted Yakima himself. He identified exactly the parts I needed, and then called me back. Very old school and very effectively. Everything worked as it should.
A quick note, the Hullraiser conversion kit doesn't include any instructions -- Yakima gives me more engineering credit than I deserve. For those who might be doing the same conversion, get the instruction manual for the Hullraiser Aero which shows how it is done.
I was amazed at how quick I received my order. The mounts I ordered were exactly what I was looking for to mount some Yakima bicycle roof racks I purchased used on craigslist. I thought I wasted my money on the racks when there was no mounts with them. I went to REI and was told I was going to need a whole different system that would cost over $300. The mounts from etrailer I bought, REI had no idea they were available. I plan on buying another set soon.
I needed to adapt hundreds of dollars worth of Yakima Kayak and Ski carriers to the Aero Rhino Rack I bought from eTrailer.com.
Ricky researched the issue, contacted Yakima, confirmed the correct adapters and I had them in less than a week.
Fantastic customer support - these guys came through for me.
I just bought a tadpole trike and I wanted to place it on my factory installed roof rack for my 2016 Toyota RAV 4. James A. was fantastic on trying to make this work. He came up with using the Yakima Boa wheel trays and the Yakima Universal Mighty Mounts. Only 2 of each was required due the length of the trike. The optional "B" lower bracket was needed. The set up is working very well. Thanks James
The Universal Mighty Mount Y03590 is the only adapter that fits the 2017 Subaru Outback factory crossbars. I learned that after ordering the 39H that was too big. Thank you,Greg, for helping me return the 39H adapters and order the Universal adapters.
The products I ordered were shipped promptly and were exactly as ordered. One issue pre-shipment was handled perfectly by customer service. Excellent experience, will return when I need similar items. Thank you.
the universal mounts work well
you need to adapt them to use them with roller mounts
and saddle mounts but that is not difficult
the direcions do no show doing that but essentiallty you have to reverse the
direction of the bolts to make it work
Brackets for older Yakima bike rack were needed for a different roof rack on another car. The eTrailer web site was easy to navigate and lead me to exactly what I needed. Received the shipment quickly.
I purchase some Yakima universal Mighty mounts to mount my bike rack to my roof rack. I purchased them from etrailer. Great transaction, great communication and emailed me with the mounting instructions when the package was delivered.
I was very happy to find adapters which fit my Yakima accessories, specifically in this case a Kayak rack, to a BMW rack which I just picked up. Haven't install them yet but it looks like everything needed is included and her order and delivery were very smooth.
Great product and wonderful doing business with eTrailer.com
As expected, brand new mighty mounts!
It has been hard to find brackets for our square bar equipment to attach to new aero bars. These fit and work great. Thanks also to the product information on the eTrailer we site which allowed us to know these would work.
Just what I need to mount my Yakima hullrisers on my BMW cross bars. Arrived very quickly.
I had questions on what i wanted to order. I called up and the people at the call center were very helpful. Later on i ordered the item needed, was updated on the shipping status and delivery was fast. Overall a great e-tailer to work with. Thanks!
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