Shimano BB-UN300 Bottom Bracket - English | 68 x 110mm Spindle - Square Taper JIS Cleats What Makes the PDW Shiny

What Makes the PDW Shiny Object CO2 Inflator Worth It

The Shimano BB-UN300-K is the long-spindle variant of the BB-UN300

Dynaplug repairs make permanent fixes on 98% of tubeless punctures

Compatible with standard single-speed freehubs and freewheel hubs

Aluminum construction keeps weight competitive while the shift ramps and guide pins deliver the smooth

Shimano BB-UN300 Bottom Bracket - English | 68 x 110mm Spindle - Square Taper JIS Cleats What Makes the PDW ShinyWhich 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