How much do they weigh? I was a little worried about my skybox with possible lifting at 120km/hr but no issues at all! Box is about 50lbs and add another 40-50lbs with ski/boarding equipment.

I placed some thicker 3M Clear bra on the portion of the rack that fits in the gutter and I have not had any scratches yet.

 

Thanks brother, didn't thinkof that. I ended up cutting up some pieces of thin foam rubber and putting that between the feet and the gutter.