It mostly supports up/down movement of the rack with minor sideways movement support. Some positives:1. zoom slip Colors are terrific, bright and energetic! Also that this links to Zoom so the icon even switches on and off. zoom slip Not true to size. zoom slip The belt that velcros around your mid section was WAY TOO SMALL and I couldnt even get it to reach the other end. The shoes are very comfortable inside though. in mind that these headphones are still pretty crappy. zoom slip The clamps do not appear to adequately attach to the bike frames and with the the bikes being squeezed together seems to increase the risk of the bikes breaking loose. So I welcome the Sony XB950N1s as the best all-around headphone out there, for me at least.
zoom slip