Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Junk. I don't see how this wouldn't scratch the bike to no end.

I sent it back. Just like the other reviews stated. The product I received had bare metal on one end that would annihilate the paint on the brand new bike we spent many hundreds of dollars on. I could have made it work by cutting some garden hose and using some tape, but the manufacturer could make it work by designing it right too, so there you have it.