If you understand the assembly instructions again, the bike rack is very easy to mount on the existing base support of the car roof, or to fix with 3 clamp straps, apparently bomb-proof! Also the bike to the holder is firmly, 120 kmh are - done everything right - no problem. The bike itself, to fix on the bike rack, or after the drive to solve again goes super fast and very good. My overall rating for the Thule bike carrier is very good!