It was worth it I chose König SUV 255 for my wheels. CU-9 100 were listed as fitting my wheels and 225/50 R17 tires. Technically, that's true. In a warm, dry garage, I managed to get them on in about 15 minutes at a time. They were on the very edge of the fitting and almost too small. I had to yank hard, get to the ground, nudge the chains with a long screwdriver to get them tight enough, and even then I had to rock the car about a meter back and forth before putting my foot on the tensioner pedal. before it finally snaps into place. I sent them back because it was too cumbersome to attach. I couldn't imagine having them work in the snow. Emptor Warning.