In addition, with the extra weight of the bikes in that position, two of the rubber straps ripped. These were great for me with my in-between size, but folks who have very narrow feet will probably have to cinch the strap more tightly. I would like to read more by this author. So Im now in my second "return/replace" effort. I am going to remove it and plastidip the straps amd replace the rubber feet with mounting magnets and hope that with the vibration and damage to the vehicle before it wears a whole in the roof! Great sound overall. I bought both the Tech Wash and TX. I use setting 3 most of the time but will occasionally turn it up to 4 when things get extra loud. Provare per credere! She loved how light weight they were out of box and room for socks.