Why does my replacement Shimano hollowtech 2 bb have a smaller outside diameter than the old one? From 44 to 41 od. Are the bearings also smaller?
To sell people, and bike mechanics, something new. For the cyclist, it’s a sleeker bearing set; for bike mechanics, it’s a new (…) tool to install said bearings.
@Leshaches started
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Why does my replacement Shimano hollowtech 2 bb have a smaller outside diameter than the old one? From 44 to 41 od. Are the bearings also smaller?