The holder itself makes a good impression, but unfortunately the Haltevorichtungen are too narrow for my 2015er Cube Carbon mountain bike (due to design very wide top tube). A Bulls Copperhead 3 (2015), also with relatively wide top tube frame (aluminum) but fits. It would be good if this plastic holder would supplied in different sizes. The material that comes into direct contact with the paint could be quiet a little softer. I will once interposing a cloth and wrap with tape if necessary in the long term. I'll keep the holder but anyway, because I have a assembly variant found which is satisfactory overall. Here, the Carbon bike remains on the ground and is fixed only to the saddle on the bottom bracket or something slightly hung (is but weitehrin on their own wheels), whereas the aluminum bike is hung properly. Overall, I do not trust to be honest a bit this clamping mechanism, so I'll probably still use the screw fixing, as soon as the final position really is fixed. Even with very strong jamming shaking the whole something. Price / performance ratio is overall okay.