New in Box Yakima Tubetop Top Tube Adapter makes carting bikes with slanted top tubes easier. Versatile Compatibility: Accommodates bikes with sloped top tubes, including mountain bikes and cruisers, making this bike holder ideal for a variety of cyclists Quick Installation: Installs rapidly and securely to your bike's seat post and stem, ensuring minimal setup time and maximum convenience Enhanced Stability: Features oversized diameter tubing and anti-rotation inserts for superior stability, keeping your bike securely mounted during transport Gentle Protection: Large molded collars ensure gentle contact with your bike's stem and seat post, preventing damage during transportation