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Shimano BB-UN300 Bicycle Bottom Bracket - British Thread - Various Sizes - Picture 1 of 1

Shimano BB-UN300 Square Taper Bottom Bracket

4.836 product ratings

JE James Cycles Outlet (15198)

100% positive Feedback

Price:

£21.99

Free delivery in 2-3 days

Estimated between Fri, 15 Aug and Sat, 16 Aug

Ships today if you order in the next Ships today if you order in the next 9h 27m

Returns:

30 days return. Buyer pays for return postage. If you use an eBay delivery label, it will be deducted from your refund amount.

Condition:

New

Shimano BB-UN300 Bicycle Bottom Bracket -. British Thread. A good quality bottom bracket for traditional chainsets. Narrow body allows clearance for cable routing under the bottom bracket.

Ratings and reviews

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4.8

6 product ratings

5 users rated this 5 out of 5 stars
1 users rated this 4 out of 5 stars
0 users rated this 3 out of 5 stars
0 users rated this 2 out of 5 stars
0 users rated this 1 out of 5 stars

Would recommend

Good value

Good quality

Most relevant reviews

by jedders2004
04 Jan, 2022
Great product from Shinano
Really nice quality item. I think this will see me or my bike out! It's Shimano so I dont need to say any more.
Verified purchase: YesCondition: New
by slaphappygrandpappy
05 Aug, 2025
Good quality bottom bracket fits my bike...
Good quality bottom bracket fits my bike perfect and works great
Verified purchase: YesCondition: New
by mercedesdavid2005
12 Aug, 2022
Good seals. Spins nice and quietly
Bought this to replace the BB on my 2021 Specialized Rockhopper. This unit is by far better quality than the one that came on the bike. It has more seals to keep grime out. It spins so smoothly and unlike the one I’m replacing is ultra quiet.
Verified purchase: YesCondition: New
by mariuspawli_0
11 Feb, 2022
Replacement Bottom Bracket
The BB was the same type as the one originally in the bike, so it is a perfect replacement.
Verified purchase: YesCondition: New
by jbax9388
07 Aug, 2022
Branded Product
a name you can trust, only down side is, it is not supplied with new bolts
Verified purchase: YesCondition: New
by hilste-wivbzswt
13 Oct, 2021
Asexpected
Verygood
Verified purchase: YesCondition: New