Theyre so well made, it hurts and cracks my feet chiropractic-style, but probably with less benefits. He used it for gym and loves it I have around 12 pair at the moment. Audio/mic was great for virtual meetings. Fits well to the bike and is secured when going over a bumpy road. If the other has something to say or notify, it will stop the first device and send its audio and later resume playback. Maybe I misunderstood and there is another rack with the "Oversized hooks" that they mention. Not what it was designed for but let me tell you that " automatic " brake made this a one man job. It?s not a five star product. Plus I can plug my ear buds into my phone so I can listen to music.