The chainrain says Shimano SG B-50, so it has a Super Glider chainring. That's all I know.
If it's HollowTech, it will have a different bottom bracket, but I don't want to take mine apart yet. I'm just thinking of ordering the HollowTech tool now for when I do work on it.
If it's HollowTech, it will have a different bottom bracket, but I don't want to take mine apart yet. I'm just thinking of ordering the HollowTech tool now for when I do work on it.