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Yakima Tube Top Bike Adapter Bar

Yakima Tube Top Bike Adapter Bar

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For female or oddly shaped frames, throw on a Tube Top Adapter. The adapter attaches quickly and easily between your handlebars and seat post to form a sturdy, horizontal bar, which makes the bike compatible with most hitch mounted carriers. 1-800-940-8924 to order Yakima accessories and parts part number Y02531 or order online at Free expert support on all Yakima products. Guaranteed Lowest Price and Fastest Shipping for Yakima Tube Top Bike Adapter Bar. Accessories and Parts reviews from real customers.
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Yakima Accessories and Parts

  • Hitch Bike Racks
  • Spare Tire Bike Racks
  • Trunk Bike Racks
  • Bike Adapter Bar
  • Yakima
  • 14-1/2 - 31-1/2 Inch Long

For female or oddly shaped frames, throw on a Tube Top Adapter. The adapter attaches quickly and easily between your handlebars and seat post to form a sturdy, horizontal bar, which makes the bike compatible with most hitch mounted carriers.


  • Creates a straight tube top for female or oddly shaped bike frames
  • Installs quickly and securely on wide range of bikes
    • Keeps bikes secure on single- or dual-arm mounts
  • Has adjustable, large-diameter tubing and anti-rotation inserts
    • Provides greater bike stability
  • Attaches to bike with molded collars
    • Collars are gentle on bike stem and seat post


  • Fits most bike frames and styles
  • Capacity: 1 bike at 45 lbs
  • Weight: 3.5 lbs
  • Retracted length:
    • Overall: 25-3/8"
    • Tube only: 14"
  • Extended length:
    • Overall: 31-1/2"
    • Tube only: 22-1/8"
  • Lifetime warranty

Dimensions of Cross Tube Adapter Bar Extended and Retracted

8002531 Yakima Tube Top Bike Adapter Bar

Item # Y02531

Installation Details Y02531 Installation instructions

Customer Reviews

Yakima Tube Top Bike Adapter Bar - Y02531

Average Customer Rating:  4.6 out of 5 stars   (161 Customer Reviews)

For female or oddly shaped frames, throw on a Tube Top Adapter. The adapter attaches quickly and easily between your handlebars and seat post to form a sturdy, horizontal bar, which makes the bike compatible with most hitch mounted carriers.


It allow me to secure my step thru Lectric E bikes on the Hollywood Sport bike rack.


Great product. Secure my bicycle easier and make transportation faster.


Purchased this unit only after my original adapter bar (from Swagman) was on back order. I called eTrailer after not seeing any activity from my order in 2 days. That's when I was made aware that it was not available for another couple of weeks. Not a big deal but would have liked to be notified sooner and not have the rest of my order delayed because of the adapter bar.
The unit is well built, heavy duty and very sturdy. Locking arms lock in place with a click to let you know they're locked. Doesn't fit my wife's bike that well (a bit long) but I've gotten it to work. Used it over the weekend on a 4hr trip and looked and performed great. Thanks eTrailer

Well, its been over a year now and the Yakima Tube Top Bike Adapter still looks great and is holding up well to the rigors Ive put it through. Thanks again
Dave R - 02/23/2015


Prior to purchasing the bike rack, we loaded our bikes in the back of our CRV. We had not purchased a rack before as we were told that there weren't any racks that would fit a CRV. That's where came in - I went on line and found the site and the rest is history. The bike rack came quickly and with a few adjustments, it was soon on the back of the CRV. Unfortunately, I did not realize that a female bike required an adapter bar so we were unable to use the rack with both bikes until the second order arrived with the adapter enclosed. Friendly and prompt communication from on both orders. I definitely recommend purchasing this product from - just don't forget a Tube Top adapter if one of your two bikes is for a woman!

Hi, is your Honda CRV a 2014 5door?How many stabilizing straps do you have?Thank you!Janet
-- comment by: Janet - 07/08/2014


I received the Yakima bike rack from etrailer for my Jeep. I received it quickly and found it easy to attach. I then determined that since I have a woman's/mountain bike I needed the tube top adapter. I do wish I would have known that so I could have ordered everything at the same time. I now have it all and everything works great!


Decent little rack. I mounted this on a 2020 Jeep Renegade 4x4 Limited. It was difficult to get set up and as a ton of slack on the tie downs. I just cut them and burned the nylon since this is the only vehicle that this rack will ever be on. Secured one bike, rode well with little movement. Secured two bikes, a little wiggle. Secured three bikes and I was not comfortable at all!!
The bikes I loaded are a Giant Stance 1 29er Full Suspension, Trek Marlin 5 hardtail and a Liv Bliss 2. The total of weight of these 3 bikes is 92 pounds, shouldn't be that big of an issue... however, when looking at the directions on Yakima site, it says that 90 pounds includes the weight of the rack?!?!?! I mean come on be real as to what people can put on their rack without the weight of the rack. I would not buy this again if I had the choice.

However, etrailer... you guys rock. Super fast shipping and easy check-out!!

by: not only had the best price for the adapter bar I was looking for, but they did not gouge me on shipping costs. After ordering you get emails at every stage, than the best of all, I received an email stating they bumped my order from standard to priority at no additional charges. I will check in the future for purchases, outstanding customer service and delivery.


The Bike Adapter Bar works as intended. The buttons to release the two ends are recessed and difficult to press open. The bar is heavy and adds additional unecessary weight as I life my bike on my rack.


Worked great on my wife’s bike. Balances her bike while on the rack

Works great!! I have had this for a year now and makes hanging my wife’s 630 beach cruiser easy.
Tom - 08/29/2021


Excellent bike rack for my two electric bikes. The guy I talked to on the phone answered all my questions and was very helpful as I ordered the bicycle rack.


I placed an order for a Swagman bike rack and and 2 adapter bars with in early August 2016. A week later I received a notice that the adapter bars were on back order, but my order would be sent once they were available. Another several weeks passed and I called to inquire about the status. I spoke with Pat C. who explained that there was no expected date for shipment, but she could replace the adapter bars with another brand. I was happy with the offer and accepted. Then Pat checked the rest of my order and was very happy to tell me that the bike rack was on sale for Labor Day. She cancelled my previous order and started a new one. Pat saved me nearly $50! My order was shipped later that day and I received it two days later. It was a delight to speak with Pat. She was friendly, helpful and showed great interest in making the customer happy. I will definitely use again.

I am still living both products!
Jen - 10/23/2017


Fit both my wife beach cruise and the kids mountain bikes, can't think of a thing i would change.


My New E Bike is a Step through, and Bike Carrier is a Fat Tire Rack so I needed a Bar to go from the Handle Bar to the Seat Post. Should work out PERFECT to Transport my E Bike. No Pictures yet.


After a consult with an eTrailer rep, I finally settled on the Saris. I used this for a 3 hour trip (6 hours round trip) with 3 bikes on a lexus NX200T. The video does not show that you need to remove a piece for certain tow hitches. Once I figured that out, it was very easy to assemble. The bikes remained stable and did not get scratched. The locking mechanism added greater stability for the bikes and security when we stopped at rest stops. Remember to buy a cross bar add on if the bike does not have one. I had 2 bikes with the add on, and one without. All 3 bikes remained secure for the trip


ill give it 2 stars, and only for it's sturdiness. what a bad design. first off, why would you not make the collars adjustable. adjustable collars would allow tightening of bar to seat post and goose neck to eliminate bike movement once mounted. a locking mechanism for telescoping bar itself would do the same thing. this top bar has neither. matter of fact, for some odd reason, most top bar adapters on the market don't. the overly large collar mechanisms also limit mounting points, meaning not much left to right movement on the bike rack itself in order to get bikes out of way of each other. if you ever tried mounting 3 to 4 bikes on a 4-bike rack you know what i'm talking about. needless to say sending them back and will remove bottle mount cages to make bikes fit together.....


I have a few of these and they work great for many types of bikes.


The price, and product were great. Delivery was prompt. The bike bar adapter works great, the only issue was when using the front of the bar on the handlebar stem the front wheel was to close to the ground when mounted on the bike rack, but this was resolved by placing the front of the bar on the top of the fork tube of the frame, the extra 1 1/2" gained by doing this leveled ot the bike on the rack, and gave me the clearance needed. The bike is a 1947 Monark Super Deluxe womens bike, with a tank, and dual springer front end. Thanks for a great product !!

Larry Wildes


Works as advertised


everything was awesome especially my customer service agent I spoke with, Ellen. The package did come damaged but that’s not your fault. I’ll be installing it tomorrow and reach out if there’s any damage/missing parts!


Never received item


Very well constructed, fits frame somewhat loosely, does not allow much adjustment to center the weight on the hitch for our Scott ebikes.


These have worked just fine on our kids' bikes, although we had to be creative as to how to attach them to their bikes as their bikes are quite small.


Product was back ordered but business was extremely communicative about the order; letting me know the status along the way. It actually arrived before the expected date. No complaints.


Works well, video for use excellent.


Amazingly FAST shipping! Thanks! The products work as described.

Show More Reviews

See what our Experts say about this Yakima Accessories and Parts

  • Is Yakima Tube Top Bike Adapter Bar Supposed to Fit Loosely on a Bike
    Yakima Tube Top Bike Adapter Bar # Y02531 will fit loosely on the bike until the bike is placed on a hanging style bike rack. At that point gravity pulling the bike down, and the bike rack arms holding the adapter bar up, will keep it secure. So it doesn't sound like there is a problem with the one you have. I would do a test run with it on the bike and the bike loaded on the rack. Just a low speed, around the neighborhood type of test. If you find that the adapter is behaving oddly let me know.
    view full answer...
  • Does Adjustable Seat Quick Release Nee to be Removed to Use the Yakima Tube Top Bike Adapter Bar
    The Yakima Tube Top Bike Adapter Bar # Y02531 can be used on your bike if it has the quick release seat adjustment. We actually have a picture of us installing it this way on one of our bikes! (see attached photo) Really the only time this would be an issue is if your quick release lever wasn't very reliable. If you would like to replace it with a nut and bolts anyways just for peace of mind then there is no harm in that either.
    view full answer...
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  • What's The Difference Between Yakima Bar Adapter 8002531 & Y02531
    The 8002531 Yakima Tube Top Bike Adapter Bar and the Yakima Tube Top Bike Adapter Bar Item # Y02531 are the same product. 8002531 is Yakima's part number for this product and # Y02531 is'S part number for this product for our inventory purposes.
    view full answer...
  • Can a Yakima Tube Top Adapter Bar # Y02531 be Used with a Suspension Seat on a Diamondback Bike
    The Yakima Tube Top Bike Adapter Bar # Y02531 would no interfere at all with the suspension seat you have on your Diamondback ladies bike. No damage would be caused either. Check out the review video I attached for this product as well.
    view full answer...
  • Bike Adapter Bar That Fits A Kids Mountain Bike
    I recommend the Yakima Tube Top Bike Adapter Bar Item # Y02531. Fully retracted the measurement from one end of the bar to the other, not including the hook is 14-1/4" and when extended is 22-1/8".
    view full answer...
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  • How to Determine the Weight Capacity of the Yakima Tube Top Bike Adapter Bar
    The weight capacity of the Yakima Tube Top bike adapter bar, # Y02531, is determined by the weight capacity of the bike rack you are using. Most bike racks are limited to 30 or 35 lbs per bike and if you are carrying a 40 pound bike rack on a 2 bike rack that has a capacity of 35 lbs per bike you would need to position the heavier bike closer to the vehicle and make sure that the second bike does not cause you to exceed the capacity of the rack. According to Yakima, as long as you stay...
    view full answer...
  • Bike Frame Adapter Bar Recommendation for the Prorack 2 Bike Trunk Mount Rack
    I recommend using the Yakima Tube Top Adapter Bar, # Y02531, with your new Prorack 2 bike rack. For best compatibility, it is a good idea to stick with products that are made by the same manufacturer. Some small and angled bike frames can be difficult to load on bike racks. This adapter allows you to load the bikes easily and safely on a bike rack. One end of the adapter will attach to the seat post and the other end will attach to the handle bar post. I have attached instructions and...
    view full answer...
  • Bike Frame Adapter Bar for Small Kids Bikes on a Thule Apex 5 Trailer Hitch Mount Bike Rack
    Like you have said, the smallest adapter bars are going to be 14-1/2 inches at their shortest length so that is not going to be small enough for the 14 inches you will need. You may have to attach the adapter in an alternate location such as one end around the seat post and the other end higher up on the handle bars if possible. Or you may have to raise the seat and/or handle bars up so they are further apart to get the adapters to fit. If nothing you do allows the adapter to fit then...
    view full answer...
  • Will Yakima Bike Adapter Bar Work With Giant LIV Women's Bike On Yakima KingJoe Pro Bike Carrier
    The Yakima Tube Top Bike Adapter Bar, part # Y02531, measures 14-1/2 inches long at shortest; 31-1/2 inches at maximum length. You can measure the distance from the outside of your seat post to the outside of your handlebar stem to make sure it falls within those distances. The # Y02531 will fit great in the KingJoe pro bike carrier you have.
    view full answer...
  • Adapter to Load a Girls Bike on the Yakima RidgeBackTrailer Hitch Mount Bike Carrier
    Yes, there is an adapter you can use. Since you will be carrying bikes that do not have a top frame bar that goes straight across (like a typical mens bike would) then I recommend using bike adapter bar # Y02531. This will allow you to carry those bikes more level and will provide better ground clearance. I have to use these adapters and without them my wifes bike would be at a severe angle and I would not be able to load my sons bike at all. I have linked a video that shows how the adapter...
    view full answer...
  • Will a Girls Bike Fit on the Yakima SwingDaddy Bike Carrier
    Yes, girls bikes will fit on the Yakima SwingDaddy, but I would add an adapter bar such as # Y02531. The adapter attaches quickly and easily between your handlebars and seat post to form a sturdy, horizontal bar. I have included a couple video reviews for you too.
    view full answer...
  • How to Load a Womens Frame Bike on a Yakima Hanging Bike Rack
    We do have some demonstration videos. I have included a link below to a video demonstrating the Yakima bike frame adapter, part # Y02531, with a similar Yakima bike rack. The video explains and shows how the adapter is installed.
    view full answer...
  • What are the Dimensions for the Yakima Tube Top Bike Adapter Bar, # Y02531
    I went out to the warehouse and pulled a Yakima Tube Top Adapter Bar, # Y02531. When measured from the inside of the clamp on one end to the inside clamp on the other end, the shortest length is 14-1/2 inches. The longest inside dimension with the bar pulled all the way out measured 30 inches. Overall length, with the bar collapsed is 23-3/4 inches, fully extended it is 31-1/2 inches long. The 2 clamps are different sizes. The internal dimensions of the smaller one are 1-1/2 inches wide...
    view full answer...
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  • Does the Yakima Trunk Mount Rack Have the Ability To Carry a Womans Bike
    To be able to carry a woman's bike that does not have the horizontal cross bar, on the Yakima KingJoe 3 Bike Trunk Mount Rack, you will need to use the Yakima Tube Top Bike Adapter Bar, part # Y02531. This Yakima adapter bar attaches to the center seat post and to the handlebar post of the bike and provides a horizontal bar, so the bike can ride level on the bike rack. I am including a link to the instructions on the adapter and a link to a video review of the adapter. If you let me...
    view full answer...
  • Bike Adapter Bar with the Highest Weight Capacity Rating for 2 Cruiser Bikes
    I wouldn't say black and red on the Yakima adapter bar # Y02531 is ugly but then again beauty is in the eye of the beholder. But yes, it is the only bike adapter bar that will have the capacity for a 40 pound bike. There are a lot of bike adapter bars and they are all pretty much the same. Capacities given usually match the per-bike capacity of the racks from the same manufacturer. Yakima is the oddball but it works out. At least the adapter bars will only be on the bikes when they are...
    view full answer...
  • Bike Adapter Bar With Highest Weight Capacity
    Since your bike only weighs 4lbs more than the weight capacity of the Yakima Tube Top Bike Adapter Bar # Y02531 it likely will not cause an issue, however, I never recommend exceeding the weight capacity on any product. If there is anything that you can remove off of the bike in order to reduce the weight then I would go that route. This bar has the highest weight capacity available so it is your best option. I attached a demonstration video for you to check out.
    view full answer...
  • Does Yakima HangOut 3 fit 2014 Toyota Highlander
    Yes, the Yakima HangOut 3 # Y02638, is a confirmed fit the 2014 Toyota Highlander. I have included a video review of this bike rack for you to check out. If you will be carrying womens, childrens, or alternative frame bikes I recommend using the Tube Top adapter bar, # Y02531, for greater ground clearance and to carry the bikes more level. I have included a link to a video showing how the adapter works.
    view full answer...
  • Do I Need a Frame Adapter for Yakima HangOut 2
    Thank you for the picture. Those are always helpful! Because those bikes have rather aggressive frames, you'll need the frame adapters to carry them on a hanging rack like the Yakima HangOut 2 # Y02637. I recommend using the Yakima Tube Top Bike Adapter Bar # Y02531 because of the molded collars that are used on the frame and seat post, which is great to keep your bike looking new. You'll also want to make sure that your bikes are less than 30-lbs each (60-lbs total) to stay under the capacity...
    view full answer...
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  • Recommended Trunk Mounted Bike Rack for a 2010 Mini Cooper S
    The Yakima FullBack 2 Bike Rack part # Y02634 is a confirmed fit for your 2010 Mini Cooper S. The reason you were having trouble with the top hooks between the hatch and roof line is because you need to substitute them for the Yakima's Glass Hatch Hooks which are included with either rack. The Glass Hatch Hooks will allow you to safely secure the bike rack to your vehicle. Please note that if you have any bikes with an alternative frame then you will also need the Yakima Tube Top Bike Adapter...
    view full answer...
  • Recommended Bike Rack for 2015 Honda Pilot
    All 2015 Honda Pilots come with a trailer hitch already so you should have one on your vehicle; there are no aftermarket hitches available for this car. For a bike rack I highly recommend checking out the Yakima RidgeBack # Y02458. This is a 4-bike rack which fits both 1-1/4" and 2" hitches that uses anti-sway cradles to support your bikes at three different points in order to keep your bikes safe from contacting your Pilot or each other. It offers convenience with a handy push button...
    view full answer...
  • Will Yakima FullBack Trunk Mount Bike Rack Fit 2015 Dodge Dart with Spoiler
    Yes it does! I checked with Yakima and can confirm for you that the Yakima FullBack # Y02634 is a fit for your 2015 Dodge Dart GT with a spoiler. Additionally, please note that when using any hanging rack like the FullBack you'll need bike frame adapter bar # Y02531 if your bike is dual-suspension, has a step-through frame or you want to carry a small children's bike. The bar will give those bikes a horizontal mounting point so they can be carried by the rack.
    view full answer...
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  • Recommended Trunk-Mounted Bike Rack for 2017 Subaru Impreza
    The Mighty Joe has been discontinued so there would be no fit information available for a 2017 Subaru Impreza. Instead, I strongly recommend checking out the Yakima FullBack # Y02636. This is a high-quality bike rack featuring anti-sway cradles that have heavy-duty padding and ratcheting straps to secure your bikes at three different points to keep them from making contact with one another. The rack has arms which adjust and fold down for when you are not using it and are made of steel...
    view full answer...
  • Can Top Hatch of 2016 Honda CR-V be Opened With Yakima FullBack On?
    The Yakima FullBack # Y02634 would not be able to stay on your 2016 Honda CR-V while you open your hatch. As stated in the linked directions, opening the hatch with the hooks could potentially damage your CR-V. Please note that when using a trunk-mounted rack like the Yakima FullBack # Y02634 it's possible you'll need bike frame adapter bar # Y02531 if your bike is dual-suspension, has a step-through frame or you want to carry a small children's bike. The bar will give those bikes a horizontal...
    view full answer...
  • Will Yakima FullBack Trunk Mount Bike Rack Fit 2017 Toyota Yaris Hatchback
    Thank you for the lovely photo and yes, the Yakima FullBack 2 Bike Rack # Y02634 will absolutely fit your 2017 Toyota Yaris hatchback. You have made a great choice because the FullBack is exactly what I would have recommended for you because of its premium anti-sway cradles that stabilize your bikes as they are being transported. Another reason I really like this rack is its integrated security features. It has a cable lock which secures your bikes to the rack as well as a steel-reinforced...
    view full answer...
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