Review on DECKAS Chain Guide BB Mount: Lightweight Aluminum Alloy Bike Chain Guard for MTB Bicycle with 30-40T Compatibility by Bill Roberts

I bought a Decas crankset and bought this for it. Strangely, it doesn't fit - it sits too close to the frame. I even moved the chainring to the innermost part of the setup. I was disappointed. I had to add spacers at the top where they shouldn't be installed - it wasn't a clean install. It had been in place for a couple of months now so the most annoying thing was knowing I had to adjust it to fit a crank from the same company. If I could do it again I would choose a frame mount over a bottom bracket mount.