• Adapter that makes your bike compatible with most mast-style hitch racks
  • Installs quickly and securely to your seat post and stem to adapt a wide range of bikes for transport
  • Keeps your bike mounted solidly on single and dual arm mounts
  • Oversized diameter tubing and anti-rotation inserts for greater stability
  • Large molded collars are gentle with your bike stem and seat post
  • Bike Capacity: 1 bike weighing up to 45lbs.

Learn more about Product features and installation

Download Instructions
  • Packaged Weight: 3.35 lbs.
  • Package Dimensions: L 24.25" X W 4.00" X H 2.00"
  • Capacity: 1
Product #8002531

Q: How does the tube top work? A: The tube top attaches to the seat post and neck (aka headtube) of a bike, effectively creating a traditional top-tube type structure for mounting on trunk or hitch racks. This is the solution for difficulty fitting kid’s, women’s, and odd-shaped bikes.

Q: Will it fit every bike? A: It fits most bikes and is adjustable from 14" to 30". If in doubt, the best way to tell is to try it out at a local dealer.

Q: Is it easy to take off? A: The TubeTop is very quick on and off, so you can leave it in the car while on your ride.

Q: Can I use the Tube Top adapter with my dropper post? A: Though it may work, we don't recommend it. We recommend using the Tube Top adapter with standard seat posts only.