Byrned1978
Old School Hero
Hi mate, out of interest what size is the bottom bracket? Appreciate that you may have sold this but I'd be interested to know. Thanks
Brilliant thanks. I saw that it was in the OP after I'd messaged but thanks for getting back to me.123mm English 68mm
The BB-CS20 could be asymmetric so a modern sealed cartridge one may need to be different size. Here's a photo of it apart. The adapter cup (black plastic) goes on the drive side and the steel cup / shell goes on the non-drive side.