When I wrote ‘Perplexing Plastic’ a few people brought up clearance but the actual radius difference is so minuscule I can’t see any application where it would make a difference. Especially with most carbon road bikes being Pressfit.
I would almost believe it was strictly a cosmetic upgrade but that seems rather un-Shimano. Moment of weakness?
Someone I know who works for/with Shimano told me the smaller cups let them improve bearing durability and sealing but again looking at the minor change in diameter and the fact Shimano builds bearings that seems laughable. Certainly they couldn’t back that information up.
Anyways, I know shops all have a metal tool(s) to work on these BBs and no one else cares but change for change sake bugs the hell out of me and I’m not buying yet another BB tool so I’m going to keep ranting about it. I keep it to a caption so folks can breeze through if they’re tired of my curmudgeonly persnicketness.
July 6, 2020, 9:36 a.m. - Andrew Major
When I wrote ‘Perplexing Plastic’ a few people brought up clearance but the actual radius difference is so minuscule I can’t see any application where it would make a difference. Especially with most carbon road bikes being Pressfit. I would almost believe it was strictly a cosmetic upgrade but that seems rather un-Shimano. Moment of weakness? Someone I know who works for/with Shimano told me the smaller cups let them improve bearing durability and sealing but again looking at the minor change in diameter and the fact Shimano builds bearings that seems laughable. Certainly they couldn’t back that information up. Anyways, I know shops all have a metal tool(s) to work on these BBs and no one else cares but change for change sake bugs the hell out of me and I’m not buying yet another BB tool so I’m going to keep ranting about it. I keep it to a caption so folks can breeze through if they’re tired of my curmudgeonly persnicketness.