I'm building a hybrid bicycle using a Specialized StumpJumper S-Works carbon frameset.
- The drive-train is 1x12.
- Wolf Tooth 52T cyclocross chainring, to beef up the top end gearing.
(The chainring is compatible with SRAM Eagle 1x12 drive-train components.)
- 10t-50t rear cassette, for ultra wide range.
I've found a lightweight aluminum bashring that fits 52T chainrings, so that's not an issue.
However, I need to find a reliable 52T 1x chainguide for 12-speed chains.
I'm not a huge fan of the chain guides that hang on the frame, and the StumpJumper has odd shapes in the frame bars, making this effectively impossible.
I remember, around a year ago, I found a rare and obscure 52/54T chainguide that mounted on the crankset/BB, but I don't remember anything else about it.
Where should I look for a top/bottom 1x chainguide, crankset/BB mounted, fitting 12-speed chains?