
Shimano Chaincase BB-UN300-K Square Taper Bottom Bracket
The Shimano BB-UN300-K is a square taper JIS bottom bracket specifically designed for use with a chaincase. This reliable component ensures smooth rotation and a stable drivetrain interface for MTB configurations.
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Precision Fitment: This 68x122.5mm MTB Double option includes a 0.7mm spacer to ensure proper alignment and clearance within the bottom bracket shell.
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Chaincase Compatibility: Specifically engineered as a "K" type model, making it the correct choice for bicycles equipped with a full chaincase.
Original: $17.59
-65%$17.59
$6.16Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
The Shimano BB-UN300-K is a square taper JIS bottom bracket specifically designed for use with a chaincase. This reliable component ensures smooth rotation and a stable drivetrain interface for MTB configurations.
-
Precision Fitment: This 68x122.5mm MTB Double option includes a 0.7mm spacer to ensure proper alignment and clearance within the bottom bracket shell.
-
Chaincase Compatibility: Specifically engineered as a "K" type model, making it the correct choice for bicycles equipped with a full chaincase.













