Posted on 24th, March 2011 about XCR BB Mount Chainguide
Solidly-built; spacers give good adjustability for chain-line; guide can be loosened to slide up and down to suit ring size. Bit of a faff to set up, but then all BB-mounted guides are. So at this price- unbeatable. I use mine with a 38T ring on an Anthem X- works brilliantly.