Buy wisely
Buy wisely
Buy wisely

+0.2352% inflation

  1. Home
  2. /
  3. Sports & Outdoor
  4. /
  5. Cycling
  6. /
  7. Bicycle Spare Parts
  8. /
  9. Shimano BB-UN300 Bottom Bracket (Length: 73 x 118mm)

Buy wisely

BuyWisely is your one stop price comparison platform, delivering the best deals from over 20,000 online shops. We empower shoppers to make smart, cost-effective choices by offering transparent pricing, price history, and the latest deals across a broad range of products. With BuyWisely, your money goes further.

Popular Shops
Amazon.com.au
Temu
eBay.com.au
Myer
JB Hi-Fi
Catch.com.au
Kogan.com
Harvey Norman Australia
MyDeal
Bing Lee Electrics
The Good Guys
Bunnings Warehouse
Officeworks
Woolworths
BIG W
Popular Categories
Electronics
Home Appliances
Fashion
Cookware
Gaming Monitors
Games
Baby & Kids
Pets
Grocery
Kitchen
Skirts
Contact Us
andrew@buywisely.com.au
Affiliate Disclosure
Legal Information
Privacy Policy
Go to BuyWisely US
US flag
Shimano BB-UN300 Bottom Bracket (Length: 73 x 118mm)
Shimano BB-UN300 Bottom Bracket (Length: 73 x 118mm)
Shimano BB-UN300 Bottom Bracket (Length: 73 x 118mm)
Shimano BB-UN300 Bottom Bracket (Length: 73 x 118mm)
Shimano BB-UN300 Bottom Bracket (Length: 73 x 118mm)
Shimano BB-UN300 Bottom Bracket (Length: 73 x 118mm)
Shimano BB-UN300 Bottom Bracket (Length: 73 x 118mm)

Shimano BB-UN300 Bottom Bracket (Length: 73 x 118mm)

(1,751 reviews)

Shimano BB-UN300 British Thread Bottom Bracket Made with Shimano’s usual exacting standards, the BB-UN300 Bottom Bracket is an excellent option for bikes that have British threaded bottom bracket shells and chainsets with a traditional square tapered spindle fitting. Made into a one-piece unit, this bottom bracket keeps dirt, mud and water away from the sealed bearings to offer durability, corrosion resistance and low friction operation. The threaded construction installs easily without the need for any fiddly adjustments, and the narrow body of this unit means that it won't hinder gear and brake cables that are being routed internally through the frame's bottom bracket shell.

Shimano BB-UN300 British Thread Bottom Bracket Made with Shimano’s usual exacting standards, the BB-UN300 Bottom Bracket is an excellent option for bikes that have British threaded bottom bracket shells and chainsets with a traditional square tapered spindle fitting. Made into a one-piece unit, this bottom bracket keeps dirt, mud and water away from the sealed bearings to offer durability, corrosion resistance and low friction operation. The threaded construction installs easily without the need for any fiddly adjustments, and the narrow body of this unit means that it won't hinder gear and brake cables that are being routed internally through the frame's bottom bracket shell.

$20.99 - $49.02

in 14 offers

Size:

68 x 107 mm
68 x 110 mm
68 x 113 mm
68 x 115 mm
68 x 118 mm
68 x 122.5 mm
68 x 123 mm
68 x 127.5 mm
73 x 113 mm
73 x 122 mm

Shimano BB-UN300 Bottom Bracket (Length: 73 x 118mm)

$20.99

(1,751 reviews)

Shimano BB-UN300 British Thread Bottom Bracket Made with Shimano’s usual exacting standards, the BB-UN300 Bottom Bracket is an excellent option for bikes that have British threaded bottom bracket shells and chainsets with a traditional square tapered spindle fitting. Made into a one-piece unit, this bottom bracket keeps dirt, mud and water away from the sealed bearings to offer durability, corrosion resistance and low friction operation. The threaded construction installs easily without the need for any fiddly adjustments, and the narrow body of this unit means that it won't hinder gear and brake cables that are being routed internally through the frame's bottom bracket shell.

Shimano BB-UN300 British Thread Bottom Bracket Made with Shimano’s usual exacting standards, the BB-UN300 Bottom Bracket is an excellent option for bikes that have British threaded bottom bracket shells and chainsets with a traditional square tapered spindle fitting. Made into a one-piece unit, this bottom bracket keeps dirt, mud and water away from the sealed bearings to offer durability, corrosion resistance and low friction operation. The threaded construction installs easily without the need for any fiddly adjustments, and the narrow body of this unit means that it won't hinder gear and brake cables that are being routed internally through the frame's bottom bracket shell.

Size

73 x 118 mm
​

Price comparison

Last updated at 20/09/2025 09:53:36

George's Bike Shop

$20.99

+ $12.95 delivery

Go to store

ccache.cc

$22.89

+ $9.99 delivery

Go to store

Pushys

$22.99

+ $9.90 delivery

Go to store

Velogear

$25.10

+ $9.95 delivery

Go to store

Bicycle Store

$25.10

+ $9.95 delivery

Go to store

Deporvillage.net

$25.30

+ $71.99 delivery

Go to store

99 Bikes

$29.00

+ $9.90 delivery

Go to store

MightyApe.com.au

$29.99

+ $15.00 delivery

Go to store

Jonny Sprockets Bike Shop

$34.95

+ $9.95 delivery

Go to store

Good Cycles

$35.00

Go to store

See 36 more history offers

therocketsurgeon.com.au

$34.99

available 18 days ago

Low stock

jonnysprockets.au

$34.95

available 18 days ago

Low stock

thebicycledepot.com.au

$45.00

available 18 days ago

Low stock

sortedracegear.com

$49.62

available 18 days ago

Low stock

velogear.com.au

$25.10

available 18 days ago

Low stock

pushys.com.au

$22.99

available 18 days ago

Low stock

The Rocket Surgeon

$34.99

available 19 days ago

Low stock

Cycle House

$29.00

available 25 days ago

Low stock

Swinnerton Cycles AU

$34.00

available about 2 months ago

Low stock

Alchemy Cycle Trader

$29.99

available 2 months ago

Low stock

Kogan.com

$29.99

available 3 months ago

Low stock

eBay - pushys

$22.99

available 3 months ago

Low stock


Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!

Tune Cycles | Mobile Bike mechanics

$25.74

available 4 months ago

Low stock

Bicycles Victor Harbor

$33.00

available 4 months ago

Low stock

BikeExchange

$29.00

available 4 months ago

Low stock

eBay - indiegoods

$35.88

available 4 months ago

Low stock


Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!

eBay

$41.91

available 6 months ago

Low stock


Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!

eBay - rarewaves-outlet

$41.91

available 6 months ago

Low stock


Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!

Saint Cloud

$39.95

available 7 months ago

Low stock

Catch.com.au

$45.00

available 8 months ago

Low stock

eBay.com.au - indiegoods

$35.88

available 9 months ago

Low stock


Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!

Dick Smith AU

$29.99

available 10 months ago

Low stock

Bourkes Bicycles

$30.00

available 10 months ago

Low stock

eBay.com.au

$29.02

available 11 months ago

Low stock


Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!

Ivanhoe Cycles

$29.00

available 12 months ago

Low stock

Biked Cairns

$34.95

available 12 months ago

Low stock

BikeForce Clarkson

$34.95

available about 1 year ago

Low stock

Decathlon Australia

$29.99

available about 1 year ago

Low stock

eBay.com.au - contrast-sports

$36.91

available about 1 year ago

Low stock


Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!

Giant Knox City

$26.99

available about 1 year ago

Low stock

offcourse.bike

$35.00

available over 1 year ago

Low stock

Commuter Cycles

$35.00

available over 1 year ago

Low stock

eBay.com.au - rarewaves-outlet

$38.76

available over 1 year ago

Low stock


Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!

MyDeal

$45.00

available over 1 year ago

Low stock


cashrewards

Up to 4.2% cashback

shopback

Up to 3.6% Cashback

Le Tour Cycles

$24.95

available over 1 year ago

Low stock

eBay.com.au - letour-sports

$28.95

available over 1 year ago

Low stock


Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!

Price history

​
​

Price history

​
​

Specification

Included ComponentsTransmissions

Price comparison

Updated about 2 hours ago
George's Bike Shop

$20.99

+$12.95 delivery
ccache.cc

$22.89

+$9.99 delivery
Pushys

$22.99

+$9.90 delivery
Velogear

$25.10

+$9.95 delivery
Bicycle Store

$25.10

+$9.95 delivery

See 36 more history offers

therocketsurgeon.com.au

$34.99

Low Stock
jonnysprockets.au

$34.95

Low Stock
thebicycledepot.com.au

$45.00

Low Stock
sortedracegear.com

$49.62

Low Stock
velogear.com.au

$25.10

Low Stock
pushys.com.au

$22.99

Low Stock
The Rocket Surgeon

$34.99

Low Stock
Cycle House

$29.00

Low Stock
Swinnerton Cycles AU

$34.00

Low Stock
Alchemy Cycle Trader

$29.99

Low Stock
Kogan.com

$29.99

Low Stock
eBay - pushys

$22.99

Low Stock
Tune Cycles | Mobile Bike mechanics

$25.74

Low Stock
Bicycles Victor Harbor

$33.00

Low Stock
BikeExchange

$29.00

Low Stock
eBay - indiegoods

$35.88

Low Stock
eBay

$41.91

Low Stock
eBay - rarewaves-outlet

$41.91

Low Stock
Saint Cloud

$39.95

Low Stock
Catch.com.au

$45.00

Low Stock
eBay.com.au - indiegoods

$35.88

Low Stock
Dick Smith AU

$29.99

Low Stock
Bourkes Bicycles

$30.00

Low Stock
eBay.com.au

$29.02

Low Stock
Ivanhoe Cycles

$29.00

Low Stock
Biked Cairns

$34.95

Low Stock
BikeForce Clarkson

$34.95

Low Stock
Decathlon Australia

$29.99

Low Stock
eBay.com.au - contrast-sports

$36.91

Low Stock
Giant Knox City

$26.99

Low Stock
offcourse.bike

$35.00

Low Stock
Commuter Cycles

$35.00

Low Stock
eBay.com.au - rarewaves-outlet

$38.76

Low Stock
MyDeal

$45.00

Low Stock

cashrewards

Up to 4.2% cashback


shopback

Up to 3.6% Cashback

Le Tour Cycles

$24.95

Low Stock
eBay.com.au - letour-sports

$28.95

Low Stock

Price history

​
​

Price history

​
​

Specification

Included ComponentsTransmissions