Skip to content

Shimano BB-UN300

Bottom bracket Model
Shimano BB-UN300
Published bicycles
66
Variants
3 Manufacturer versions

Specifications

6 specifications

As listed in the manufacturer's catalog.

General

Series
SHIMANO
Left hand adapter / Material
Aluminum
Right hand adapter/shell / Material
Aluminum/Steel

Spindle

Square type
Yes
Material
Steel
Finish
Bonderlube

Variants

3 variants

The manufacturer's versions of this model (code suffix, color, cage). Each figure counts spec sheets that name that exact version; most name only the model.

How spec sheets write it

The most common ways bicycle spec sheets name it, by number of mentions.

  1. Shimano BB-UN300 38
  2. Shimano BB-UN300, BSA 21
  3. Shimano BB-UN300, shaft length: 117 mm, high-quality universal bottom bracket, square cone, BSA thread (BC 1.37) 5
  4. Shimano UN300, 68 mm, threaded cartridge, 110 mm spindle 1
  5. Shimano UN300, square taper, 122.5mm spindle, 68mm BSA 1

Bicycles

66 bicycles

Published bicycles that use it, newest model years first.

Bergamont Grandurance RD 3

Gravel

Bergamont

Grandurance RD 3

Model year: 2026

Bergamont Model year: 2026

Road / Gravel

  • Weight: 13.2 kg
  • Suspension: Rigid
  • Wheel size: 700c
Bergamont Sweep 4

Fitness

Bergamont

Sweep 4

Model year: 2026

Bergamont Model year: 2026

Urban / Fitness

  • Weight: 11.3 kg
  • Suspension: Rigid
  • Wheel size: 700c
Bergamont Sweep 4 EQ

Fitness

Bergamont

Sweep 4 EQ

Model year: 2026

Bergamont Model year: 2026

Urban / Fitness

  • Weight: 12.6 kg
  • Suspension: Rigid
  • Wheel size: 700c
MEC Lynx Mountain

Cross-country

MEC

Lynx Mountain

Model year: 2026

MEC Model year: 2026

Mountain / Cross-country

  • Weight: 15.8 kg
  • Suspension: 100 mm
  • Wheel size: 27.5″
MEC Provincial Trail 1

Gravel

MEC

Provincial Trail 1

Model year: 2026

MEC Model year: 2026

Road / Gravel

  • Weight: 11.3 kg
  • Suspension: Rigid
  • Wheel size: 700c
MEC Skyway 1 Hybrid

Commuter

MEC

Skyway 1 Hybrid

Model year: 2026

MEC Model year: 2026

Urban / Commuter

  • Weight: 13.8 kg
  • Suspension: Rigid
  • Wheel size: 700c
MEC Skyway 1 StepThrough Hybrid

Commuter

MEC

Skyway 1 StepThrough Hybrid

Model year: 2026

MEC Model year: 2026

Urban / Commuter

  • Weight: 13.6 kg
  • Suspension: Rigid
  • Wheel size: 700c
MEC Skyway 2 Hybrid

Commuter

MEC

Skyway 2 Hybrid

Model year: 2026

MEC Model year: 2026

Urban / Commuter

  • Weight: 13.8 kg
  • Suspension: Rigid
  • Wheel size: 700c
Salsa Journeyer Essa 1x8

Gravel

Salsa

Journeyer Essa 1x8

Model year: 2026

Salsa Model year: 2026

Road / Gravel

  • Suspension: Rigid
  • Wheel size: 700c
Scott Speedster Gravel 40

Gravel

Scott

Speedster Gravel 40

Model year: 2026

Scott Model year: 2026

Road / Gravel

  • Weight: 11.4 kg
  • Suspension: Rigid
  • Wheel size: 700c
Bergamont Grandurance RD 3

Gravel

Bergamont

Grandurance RD 3

Model year: 2025

Bergamont Model year: 2025

Road / Gravel

  • Weight: 13.2 kg
  • Suspension: Rigid
  • Wheel size: 700c
Bergamont Grandurance RD 3 blue

Gravel

Bergamont

Grandurance RD 3 blue

Model year: 2025

Bergamont Model year: 2025

Road / Gravel

  • Weight: 13.2 kg
  • Suspension: Rigid
  • Wheel size: 700c

Showing 12 of 66 bicycles