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Replacement Adapter and Seat for Yakima CoreBar Crossbars - Qty 1

Replacement Adapter and Seat for Yakima CoreBar Crossbars - Qty 1

Item # 8880639
Our Price: $7.41
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Shipping Weight: 0.11 lbs
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8880639 - Adapters Yakima Roof Rack
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Replaces 1 adapter and 1 seat for your Yakima CoreBar aero crossbars. Lets you mount crossbar to Yakima BaseLine, RidgeLine, SkyLine, or TimberLine towers. 1-636-306-4830 to order Yakima accessories and parts part number 8880639 or order online at Free expert support on all Yakima products. Guaranteed Lowest Price and Fastest Shipping for Replacement Adapter and Seat for Yakima CoreBar Crossbars - Qty 1. Accessories and Parts reviews from real customers.
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  • Reviews (37)
  • Q & A (0)
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  • Why etrailer?

Yakima Accessories and Parts - 8880639

  • Roof Rack
  • Adapters
  • CoreBar Adapters
  • Yakima

Replaces 1 adapter and 1 seat for your Yakima CoreBar aero crossbars. Lets you mount crossbar to Yakima BaseLine, RidgeLine, SkyLine, or TimberLine towers.


  • Replaces 1 adapter and 1 seat for your Yakima CoreBar aero crossbars
    • Works with Y00421, Y00422, Y00423, and Y00424
  • Lets you mount crossbar to Yakima BaseLine, RidgeLine, SkyLine, or TimberLine towers
  • Includes 1 adapter and 1 seat

8880639 Replacement Adapter and Seat for Yakima CoreBar Aero Crossbars - Qty 1

Customer Satisfaction Score:

Customer Reviews

Replacement Adapter and Seat for Yakima CoreBar Crossbars - Qty 1 - 8880639

Average Customer Rating:  4.9 out of 5 stars   (37 Customer Reviews)

Replaces 1 adapter and 1 seat for your Yakima CoreBar aero crossbars. Lets you mount crossbar to Yakima BaseLine, RidgeLine, SkyLine, or TimberLine towers.


It took some time to get them in as they were backordered, like many other products right now. Etrailer staff were great about keeping me updated due to the backordered, and followed up after the delivery. The parts were as expected and were setup an hour after the mailman dropped them off!


This is the first time that I’ve done business with this company, but it won’t be my last. Their communication with me after the order and through delivery, as well as the fast delivery are second to none. I initially ordered just one set of Yakima BaseLine towers and one Corebar. When I decided that we HAD to take the bicycles along also, I needed the other pair of towers and bar. I ordered from because they were the only company that I could find, with an exhaustive search, that sold the ‘replacement towers’ by themselves. Well, I should have done a bit more research, as the plain towers did not come with the seat or adapter for the bar. Problem solved quickly, and in time to load up and take my Cub Scouts out on a long camping weekend.

Here is the truck before adding all the rest of the camping gear and Tonneau cover. All Yakima: BaseLine towers and CoreBars, Big Catch kayak saddles, LongArm and extension, and Front Loaders for the bikes.


I needed one new bracket for my Yakima Skyline towers to attach to the cross bars. When I searched for them, this was the site was the first to come up and was the cheapest. I couldn’t find them on the Yakima website without buying a whole new cross bar. The checkout was fast and simple. I received the order in about a week.

Product is working great!
Clay - 07/23/2021


Great fit. Good price.


One year later my rack parts are working great! Study and dependable!


I want to thank the staff at eTrailer for their outstanding support. After my roof rack order got off to a shaky start the customer service staff stepped in and made it right; 100% RIGHT. I cannot thank them, and eTrailer, enough. Regarding the roof rack itself, I have now installed it and can vouch that the installation was a breeze. All parts fit and the instructions were correct. For the record, this is not my first purchase from eTrailer (I've bought hitch items from them before) and it won't be my last. They have ALWAYS given great service, their web site works, their products and descriptions are good, etc., etc. Thank you!


Exactly what I needed to replace a stripped/cross-threaded unit.

Still working great with absolutely zero issues one year installed on my car.
Brad M - 07/30/2021


Due to an error in judgement on garage door height I needed to replace the CoreBar brackets for my Yakima rack. Etrailer was the only outlet that offered the exact components I was looking for at an unbelievable price.
The shipment did travel an unusual route to get to me but it did arrive within an acceptable time-frame.


Excellent replacement parts. Worked like a charm. Would purchase again.


All I needed was a small, inexpensive part for my Yakima roof rack and i was surprised at how quick it shipped out to me.

Part fit just like original. excellent service.


Bought a set of corebars at a garage sale, but they were missing the seats. etrailer was the only place I could find them, work and fit as expected.


These are identical to the original part. I stripped the threading in one of the originals and needed a replacement, and this has worked great. Fast shipping and great service.


Worked well, came quicker than any other parts ordered from other sites.


Exact item I needed. Excellent quality and fit.


Great product, delivered extremely fast. I’ll order from etrailer when ever I need similar accessories.


I lost this component of my crossbar towers. The ordered replacement was a perfect fit.


The replacement parts fit and work perfectly.


great replacement part for my car rack


It was great actually getting the part that I ordered and was also the part that I needed.
Will definitely return to this site if I need anything else.


Great quality, fast shipping. Will definitely order more


Exactly what I needed, shipped faster than competitor and for less money.


I ordered this product on a Friday and was told it would arrive Monday. It came in on the Sunday, a day early. I installed it early Monday morning; it snapped right in and I was ready to go in about 15 minutes.


It was the exact part I needed. Worked perfectly. Arrived sooner than expected.


Great pricing and parts were in stock. Very happy with the purchase.


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Info for this part was:

Employee Tyler C
Edited by:
Tyler C
Employee Jameson C
Expert Research:
Jameson C
Employee Wilson B
Updated by:
Wilson B
Employee Brian T
Updated by:
Brian T
Employee Daron K
Written by:
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