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Rhino-Rack Bike Frame Adapter Bar for Women's and Alternative Frame Bikes

Rhino-Rack Bike Frame Adapter Bar for Women's and Alternative Frame Bikes

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Adapter lets you carry a woman's, child's, or alternative frame bicycle on your single- or dual-arm bike rack. Bar telescopes from 23" to 29" long. Easy-to-use collars secure your bike at the handlebars and seat post. 1-800-940-8924 to order Rhino Rack accessories and parts part number RRRBCA021 or order online at Free expert support on all Rhino Rack products. Great prices and Fastest Shipping for Rhino-Rack Bike Frame Adapter Bar for Women's and Alternative Frame Bikes. Accessories and Parts reviews from real customers.
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  • Reviews (151)
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Rhino Rack Accessories and Parts

  • Hitch Bike Racks
  • Spare Tire Bike Racks
  • Trunk Bike Racks
  • Bike Adapter Bar
  • Rhino Rack
  • 23 - 29 Inch Long

Adapter lets you carry a woman's, child's, or alternative frame bicycle on your single- or dual-arm bike rack. Bar telescopes from 23" to 29" long. Easy-to-use collars secure your bike at the handlebars and seat post.


  • Adapter allows for safe, level transport of a woman's, child's, or full-suspension bike on a hanging-style bike rack
    • Provides attachment point for bike rack
  • Telescoping tube adjusts to fit a variety of bicycle sizes
  • Plastic collars clamp around your bike's seat post and handlebar stem post
    • Open and close with simple, push-to-operate tabs
    • Won't mark your bike's finish
  • Sturdy, rust-resistant steel with black powder coat finish


  • Carrying capacity: 1 bicycle
  • Adapter length: 23" - 29"
  • Maximum bike dimensions:
    • Head stem diameter: 2"
    • Seat tube diameter: 1-3/16"
  • Weight capaticy: 33 lbs
  • 3-Year limited warranty

Bike Frame Adapter for Hanging-Style Carriers

Rhino Rack Adapter for Bike Frames

If you have a bicycle with an irregular frame - such as a woman's, child's, or full-suspension bike - you may need a bike adapter bar to carry your bike on a single- or dual-arm, hanging-style bike rack. This adapter bar creates a horizontal mounting point that ensures your bike will hang level on the rack for safe transport.

Telescoping Tube and Easy-To-Use Collars

Rhino Rack Bike Frame Adapter

This adapter telescopes from 23" to 29" long. The ends of the telescoping tube have plastic collars that clamp around your bike's seat post and handlebar stem post. To open a collar, push down on the tab and slide it open.

Rhino Rack Frame Adapter Clamped Bike

Place the collar around your bike frame and slide it back into place until it secures with an audible click. These plastic collars help protect your bike from scratches. And the black powder coated steel construction resists rust.

RBCA021 Rhino Rack Bike Frame Adapter Bar for Ladies' and Kids' Bikes

Item # RRRBCA021

Installation Details RRRBCA021 Installation instructions

Customer Satisfaction Score:

Customer Reviews

Rhino-Rack Bike Frame Adapter Bar for Women's and Alternative Frame Bikes - RRRBCA021

Average Customer Rating:  4.7 out of 5 stars   (151 Customer Reviews)

Adapter lets you carry a woman's, child's, or alternative frame bicycle on your single- or dual-arm bike rack. Bar telescopes from 23" to 29" long. Easy-to-use collars secure your bike at the handlebars and seat post.


The Rhino-Rack is well made and makes loading a woman's bike easier. It fits well with this rack.


The reason I chose this rack is we have (2) 75 pound ebikes that needed a very strong rack. This rack works great once I figured out how to space the bikes properly. Very strong and sturdy. I just fold down the center post and load the first bike, raise it and load bike 2. The frame bar adapters work well with these bikes.

We travel in a motorhome and tow a pickup truck . Something I don’t understand is this rack is not recommended for use on a towed vehicle.

What is the difference between driving a vehicle with the bike rack and towing the vehicle as far as the use of the rack?

Thanks You


Bought it for my wife's new, as yet undelivered, bike. I've used these before and this one looks very heavy duty and I expect it'll provide excellent service. The fit and finish are well done. The ends that will attach to the bike appear to have a very robust material coating that will protect the bike's finish when used. I expect the adapter bar will work very well and provide years of service with little maintenance required, if any.

The adapter bar for my wifes bike has worked perfectly. Its easy to install and remove and is very secure once installed. I added some foam to protect the bars finish from the bike rack J-hook and it still looks like new. Very satisfied with the adapter bar.
Rhex - 03/23/2022


Easy to use and fit my long wheelbase bikes just fine.

Still working great. Hold my bikes securely on my rear rack. Easy to use. Would buy again if needed
Eric - 08/18/2022


I've had it for 1 year and each time I use it I can't figure out how to open it or adjust it. Plus it has pinched my hand so I'm mad at it. When I bought this Rhino model I also bought a Swagman brand and it's better.


This Rhino rack bike frame adapter works great.We use it on my wifes step through e bike.It is easy to use and does not come loose at all when in use on the bike rack.would recommend.Thank you etrailer for the great customer support.


Super simple to use and can feel the quality when handling the adapter with the bikes. This has made loading the children’s bikes much easier and also secure.


Once I figured out how to use the Rhino-Rack Bike Frame Adapter Bar for Women's Bikes, I found it most helpful to mount and carry such a bike on a rear or trunk-mounted bike rack. The directions were not clear how to extend the bar and my attempts to do so were insufficient. Finally, and purely by accident, I exerted enough pull to do so; the directions should be more explicit. The etrailer person who helped me was most helpful and willing to exchange what I thought was a defective product. Also, etrailer was most timely in sending the bar. If and when I have a need for another etrailer product, I will certainly use them. They were great.


Adapter bar is just what we needed to secure our step-thru e-bike on our bike rack. Fast delivery, and a great price made our purchase perfect!

It is strong and fits our step thru bike very positive. Great product.
Kenneth B - 09/06/2021


My bike would not fit on inside rail as handle bar contacted RV. Outside rail worked very well. Trip from AZ to CO finished without incident even over significant bumps


This was part of my third order from We needed something to make carrying my wife's bike easier. Shipment arrived this morning along with the rack. This is extremely well made and should last a lone time. This makes carrying a girls bike really easy. Have already installed rack and bikes on RV and took it for a test drive. Perfect!!! Would recommend the adaptor bar over similar products I looked at locally.

After my last review we went on a 7000 mile RV trip through 9 states which lasted 27 days. The rack and bar were great. At night all we had to do was easily remove the bikes and lower the rack out of the way for access to RV storage if needed. I would periodically check the bikes and all were really secured. Getting ready for another trip 0f 5000 miles. Don’t have to worry about our bikes.I had previously purchased a hitch mounted motorcycle carrier which has been used on a3500 mile trip. Performed great. No problem in loading or unloading our scooter. Thanks for great products.
Les L - 03/05/2018


Product was delivered in a timely manner and was of made of good quality.


I initially ordered a Swagman adapter bar, but after waiting more than two months the item was still not in stock. I was offered the alternative Rhino-Rack, which was shipped immediately. I have not yet used the adapter bar, but it appears to be what I need.


Adapter works great for my roadster bik e.




Excellent quality. Holds bikes on rack through the roughest of roads. Easy to attach and take off.


Good product, good service, very satisf ied.

Product works as intended. Very satisfied.
Jimmy - 08/04/2022


We have a bike rack with trays, so bikes sit on it and arw racheted down instead of hanging. Our new bikes are Townie step-throughs so could not ratchet down. This appears to be perfect for us! And Adam at e-trailer was a great help!


I originally placed an order for the Thule frame adapter not realizing the item would not arrive until May, which is too late. Within minutes of me placing the order for the Thule, George sent me email to let me no about the May delivery date and offered to switch it out for a similar item in stock. George already had replacements linked in the email for me to review. All I had to do was call to customer service and say make the switch, which I did. The lady who answered the phone was also super friendly and extremely helpful. I had a very pleasant experience ordering from etrailer. It was my first time ordering from them and I tell you it won't be my last. The customer service is personable, friendly, efficient and fast! The products are excellent as well with such a wide variety of quality items. To my surprise, I received my order in lightning speed. They shipped it out the same day! Thank you etrailer for a great experience!


This rack has been AWESOME! I have no complaints, and have not found anyway that this could be better. RECOMMEND!


Didn't fit the bike that I was trying to adapt to the rack. Ended up paying $[XX] to return it. Not pleased.


Great products. Easy to set up and seems of high quality and sturdy.


Great quality items and shipped on time.

Works great for our radcity step thru bikes.
Alberto - 09/22/2021


Very pleased with overall experience dealing with customer representative Wayne. Placed my order and asked a number of questions regarding the Thule rack that I wished to purchase. All questions were answered in a highly professional way. Received a quick delivery of product in 3 days although a 4 day window was given. Very happy with my purchase. Have not used the rack yet, but feel content that it was a good choice. Will get back to you in future after using rack, and hope to be able to give a good review along with some photo's. Thanks again, Wayne and E-Trailer.

Have been using the Thule Rhino Rack to transport my wife and grandchildrens bicycles over the past year and find product very easy to install and does just what it is intended to do very well. Keeps bikes stable and level while transporting. Good product. George E.
George E - 09/17/2015


Excellent product. Easy to use. Well bu ilt

Show More Reviews

See what our Experts say about this Rhino Rack Accessories and Parts

  • What is Length Range of Rhino-Rack Bike Frame Adapter Bar for Women's Frame Bikes # RRRBCA021
    The adapter length range of the Rhino-Rack Bike Frame Adapter Bar for Women's and Alternative Frame Bikes # RRRBCA021 is 23-29 inches. Since you need 28-29 inches this would work well for you.
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  • What are the Seat Stem Dimensions of the Rhino-Rack Bike Frame Adapter Bar for Women's and Alt Frame
    The Rhino-Rack Bike Frame Adapter Bar # RRRBCA021 has a 2" diameter for the head stem (by the handle bars) and a 30mm measurement at the seat stem. Which translates to approximately 1.2" which can be represented as 1-1/5th". That measurement is large enough to fit the most commonly found seat stems.
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  • Frame Adapter Bar Recommendation that is the Easiest to Use
    We have heard that the buttons of the Thule Bike Adapter bar part # TH982XT can be pretty difficult to press. A coworker of mine has this adapter and has reported the same thing. I wish there was a trick to it that would make it easier, but there isn't. Of all of the adapter bars we offer the easiest one to use by far is the Swagman Adapter Bar part # 64005. If you are frustrated enough to try a different adapter this would be the one to use. I attached a review video for you to check...
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  • Will Bike Rack Anti-Sway Cradles be Compatible With Bike Frame Adapter Bar
    The anti-sway cradle will still work. The rubber strap for the anti sway strap can be attached at any place on the seat post down tube. Using a frame adapter bar won't affect that fit, as you can see in the photo I've provided. As far as frame adapters go, we really like the # 64005 from Swagman because it's the easiest to use adapter bar we offer.
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  • Is Adapter Bar Needed for Carrying Kids Bikes On Saris Glide EX 5 Rack
    I definitely recommend an adapter bar for hitch mounted, hanging style racks like the Saris Glide EX 5 bike rack (discontinued). Having done this myself for years with my own hanging style rack and no adapter bar with my 2 boy's bikes, I definitely wish I knew about these years ago. The Rhino-Rack Bike Frame Adapter Bar for Women's and Alternative Frame Bikes # RRRBCA021 is a great option. An adapter bar helps provide safe, level transport of a woman's, child's, or full-suspension...
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    The RockyMounts MonoRail Solo 1 Bike Platform Rack - 1-1/4" and 2" Hitches part # RKY10007 is very secure and one of our more popular wheel mount bike rack options for delicate carbon fiber bike frames. The arm ratchets down over the wheel to hold it in the cradle. It does include an anti-wobble threaded hitch pin to eliminate bike rack sway. I recommend to take a look for yourself at the video review I have posted demonstrating how the bike rack behaves on the road and even going over...
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    There is a really good option for a 2-bike trunk-mounted rack that fits your 2021 Subaru Forester, though I checked with Thule and verified the Passage is not a fit. The option I recommend instead is from a similar high-quality manufacturer, Yakima: - Yakima FullBack 2-Bike Rack - Trunk Mount # Y02634 I really like the FullBack for a number of reasons, starting with its strong anti-sway cradles and ratcheting straps which secure your bikes at three different points. This is important...
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    To mount a ladies multi speed bike on a Hollywood Express 2 Item # HRE2 bike rack you will need the Rhino-Rack Bike Frame Adapter Bar for Women's and Alternative Frame Bikes item # RRRBCA021. This adapter lets you carry a woman's bicycle on your dual-arm bike rack. The bar telescopes from 23" to 29" long.
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  • Is a Bike Adapter Bar Required When Carrying A Ladies Bike On The Thule OutWay
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    I do have an option for you but I can't say I have ever heard of someone mounting a bike rack directly to the tongue of their trailer nor do I have an option for this. The best option to carry your bikes while towing is between the trailer and vehicle. This option will also allow for a much greater variety of bike racks to be used as well because they don't need to be rated for use on a trailer. In order to carry your bikes between the trailer and vehicle you will first need a dual ball...
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    Both the Curt 2 # C18085 and the Malone RunWay 2 # MPG2149 will work with a step through bike like yours but you will need to get an adapter bar like the Rhino-Rack Bike Frame Adapter Bar # RRRBCA021. This will just go in between your handle bars and your seat! Both are pretty much that same thing but if it were me, I would get the Curt 2 just because it can fold in half for better storage and/or to unblock tailights. I've included a video to help show you how they work!
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