Shimano BB-UN300 Square Type Bottom Bracket 68x115mm

Brand: Shimano

SKU: 52WSM3XL

$27.00 Full price

$27.00

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Product Details

Description

Shimano quality/performance cartridge bearing square bottom bracket Tourney TX800 series. Fits 68mm bottom bracket shells, axle length 115mm.

Key Features

High-quality Shimano performance
Cartridge bearing design for smooth operation
Fits 68mm bottom bracket shells
Axle length of 115mm
Compatible with Tourney TX800 series

Specifications

Product Overview

Product

Shimano BB-UN300 Square Type Bottom Bracket 68x115mm

Brand

Shimano

Supplier SKU

ebbun300b15b

Frequently Asked Questions

What is the Shimano BB-UN300 Bottom Bracket used for?

The Shimano BB-UN300 Bottom Bracket provides a sealed cartridge bearing spindle assembly that supports square-taper cranks and enables smooth pedaling in bikes with 68mm shells and a 115mm axle.

Why choose the Shimano BB-UN300 Bottom Bracket?

Choose the Shimano BB-UN300 Bottom Bracket for its durable cartridge bearings, dependable Shimano quality, and the correct 115mm axle and 68mm shell fit that simplify installation and reduce maintenance.

Who is the Shimano BB-UN300 Bottom Bracket designed for?

The Shimano BB-UN300 Bottom Bracket is designed for riders using square-taper cranksets—especially commuters, recreational cyclists, and anyone seeking a reliable, low-maintenance upgrade or replacement.

Smooth, reliable bearings

Cartridge bearing design delivers quiet, low-friction pedaling for smoother rides. Built to maintain performance with minimal maintenance.

Perfect fit for 68mm shells

Specifically sized for 68mm bottom bracket shells to ensure secure installation. The 115mm axle provides correct chainline for many drivetrains.

Durable square-taper compatibility

Works with square-taper cranksets for proven Shimano reliability. Constructed for long-lasting performance on commuter and entry-level road/MTB bikes.