This is a very good design and easy to install. But it can't be installed on my 2018 Tiguan R-Line (Tires: 255/40-20), even the official website said this car is supported by K55. I have contacted my local dealer for assistance, but they are unable to install it either. The 19mm nut adapter is too small and the 22mm is too big. Because of this I have to return it and try to find another one.