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Shimano BB-UN300 Square Type Bottom Bracket 73x118mm

Brand: Shimano

SKU: K2TTVCE9

$25.00 Full price

$25.00

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Product Details

Description

Shimano quality/performance cartridge bearing square bottom bracket Tourney TX800 series. Fits 73mm bottom bracket shells, axle length 118mm.

Key Features

High-quality Shimano performance
Cartridge bearing design for smooth operation
Fits 73mm bottom bracket shells
Axle length of 118mm
Compatible with Tourney TX800 series

Specifications

Product Overview

Product

Shimano BB-UN300 Square Type Bottom Bracket 73x118mm

Brand

Shimano

Supplier SKU

EBBUN300C18X

Frequently Asked Questions

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

The Shimano BB-UN300 UN Series Bottom Bracket provides a sealed cartridge-bearing spindle assembly to connect crankarms and enable smooth pedaling in bikes with 73mm bottom bracket shells.

Why choose the Shimano BB-UN300 UN Series Bottom Bracket?

Choose the Shimano BB-UN300 UN Series Bottom Bracket for its reliable Shimano build, low-maintenance cartridge bearings, and exact fit for 73mm shells with an 118mm axle length—ideal for Tourney TX800 compatibility.

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

The Shimano BB-UN300 UN Series Bottom Bracket is designed for riders and mechanics seeking a durable, easy-to-install square-taper bottom bracket for commuter, recreational, or entry-level road and mountain bikes.

Smooth, reliable cartridge bearings

Precision cartridge bearings deliver quiet, low-friction operation for a smoother pedal stroke. Built to maintain performance mile after mile.

Perfect fit for 73mm shells

Specifically sized to fit 73mm bottom bracket shells for straightforward installation. No guesswork—engineered to sit securely in compatible frames.

Durable Shimano performance

High-quality Shimano construction designed for long-lasting use and consistent performance. Compatible with Tourney TX800 setups and backed by Shimano engineering.