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Aluminum construction keeps weight competitive while the shift ramps and guide pins deliver the smooth
The Shimano BB-UN300-K is the long-spindle variant of the BB-UN300
delivering tightly spaced gear steps that let you hold optimal cadence across rolling terrain without large jumps between cogs
with the 1200mm length suited for longer routing runs -- typically front derailleur to battery connections
0 Left Bottle Cage
Shimano BB-UN300 Bottom Bracket - English | 68 x 110mm Spindle - Square Taper JIS Cleats Aluminum construction keeps weight competitiveWhich Bikes Need the Shimano BB UN300 68x110mm Bottom Bracket? The Shimano BB UN300 in the 68mm English x 110mm spindle configuration is a cartridge bearing square taper bottom bracket built for bikes where a shorter spindle produces the correct chainline primarily road and hybrid frames with double chainring setups where the shorter 110mm spindle positions the chainrings correctly relative to the dropout centerline. The integrated chain line
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