I work Parts count at a Construction Dealer so I am sitting indoors almost of the day and when I am up and about its as you expect on smooth hard concrete. Plug and play, does what it needs to do. I was very scared this would be the same way. 3) The SKS lock cores are more expensive than Thules. Here I could afford a 3BR house. You will need to hem it up. I have since ordered the 12-18 month size to get a better fit. I say this all truthfully. I was on the last latch so there is no room to really go down in size as you lose stomach fat. Sie verschwinden drucklos und vollständig in diesen so kompakt wirkenden Ohrpolstern, die dabei ordentlich versiegeln.