This is a great bike carrier for the price and is VERY solid. I use it to carry my full suspension 2001 Specialized MTB and my sons 24 inch MTB and we can get them both on without an adapter.  The only reason why I gave it 4 stars instead of 5 stars is because the top plate that holds all the bikes on the rack is one piece and all bikes must be on the rack before you can clamp them down. This is not a big problem but my friend has a much older version of this rack (about 10 years) and it had two different top plates to hold the bikes down, one for the back two bikes and another for the front two bikes. I like the old style better. It is not a deal killer and this newer design works very well, I just prefer the old version.