Shimano BB-UN300 Square Type Bottom Bracket 73x113mm

Brand: Shimano

SKU: 8ZHJTX3E

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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 113mm.

Specifications

Product Overview

Product

Shimano BB-UN300 Square Type Bottom Bracket 73x113mm

Brand

Shimano

Supplier SKU

ebbun300c13x

Frequently Asked Questions

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

The Shimano BB-UN300 UN Series Square Taper Bottom Bracket is used to replace worn-out bottom brackets in bikes with square-taper cranks, providing smooth rotation in a 73mm shell with a 113mm axle.

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

It uses quality cartridge bearings, seals against dirt, and fits a 73mm shell with a 113mm axle, offering reliable, value-conscious performance compatible with the Tourney TX800 lineage.

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

Designed for riders with square-taper cranksets upgrading a 73mm shell bicycle, especially those seeking dependable, entry-level Shimano performance.

Smooth Rotation, Long-Lasting Durability

Delivers quiet, reliable performance with a sealed cartridge bearing design. Built to endure the rigors of everyday riding on a 73mm shell with a 113mm axle.