The Yakima Tube Top Adapter will help you hook any funky-top-tubed bike to a mast-style hitch rack. The Yakima Tube Top Adapter installs quickly and securely to your bike's seat post and stem to create a faux-top-tube so your bike mounts solidly to the rack. Large molded collars on the Yakima Tube Top Adapter are gentle to your bike's finish.
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This product is great. It's super easy to use and is truly versatile. I recommend this for anyone who needs a more horizontal surface for their bike rack.
Do the job and are easy to use. I use them on two kids bikes and my wife's. This is one of the few that has a short enough span for kids bike frames. That is why I decided to go this direction and am very pleased with them.