“The saddle rail mount is very good. It fits well on my TT bike which has a very wide seat post. The only problem: it was not sold with the universal mount, so I could not fix the Fly6 light on it. Very annoying that it’s not sold with that mount, and I had to order it separately and pay another set of delivery fees. I know the specs say that it does not include the universal mount, but I did not understand the consequence of that until I actually saw the product.”