Components Bottom brackets Threaded Shimano BB-UN300 bottom bracket, 68x113 mm, BSA, square type, MTB

Shimano

Shimano BB-UN300 bottom bracket, 68x113 mm, BSA, square type, MTB

Name: Shimano BB-UN300 bottom bracket, 68x113 mm, BSA, square type, MTB
Price: 12.09 EUR
Availability: InStock
Rating: 4.5 (113 reviews)

4.54/5 (113 ratings)

Availability

12.09 €

RRP 19.99 €

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By courier to your home Express courier delivery GLS

Delivery method on Thursday 22.01.2026

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Delivery method on Thursday 22.01.2026

Extended return option up to 100 days More info

Other product variants

Shimano Tourney BB-UN300 bottom bracket, 68x122.5 mm (D-NL), BSA, square taper, MTB 14.09 €

Shimano BB-UN300 bottom bracket, 68x118 mm, BSA, square, MTB 12.29 €

Shimano BB-UN300 bottom bracket, 68x127 mm, BSA, square taper, MTB 13.90 €

Shimano BB-UN300 bottom bracket, 68x110 mm, BSA, square taper, MTB 14 €

Shimano BB-UN300 bottom bracket, 68x115 mm, BSA, square, MTB 17.79 €

Rating (113)

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4,5/5

Product description

Shimano BB-UN300 center composition

Encased square center axis BB-UN300. The package does not include screws for mounting the cranks.

Product details

Suitability	MTB
Mount type	BSA
Axis type for crankset	Square
Frame width	68 mm
Dimensions	68 x 113 mm
Mount method	BSA, square
Weight	274 g
Material	steel, plastic
product ID	111608
EAN

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Product rating (113 ratings)

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Warnings and instructions

WARNING
For information on installing, adjusting, and replacing products that are not found in the user's manual, please consult the place of purchase or a distributor. A dealer's manual intended for professional and experienced bicycle mechanics is available on our website (https://si.shimano.com).
For safety, be sure to read this "user's manual" thoroughly before use, follow it for correct use, and save it so that you can refer to it at any time.
The following instructions should always be followed in order to prevent personal injury and physical damage to equipment and the environment. The instructions are classified according to the degree of danger or damage that may occur if the product is used incorrectly.
DANGER - Failure to follow the instructions will result in death or serious injury.
WARNING - Failure to follow the instructions could result in death or serious injury.
CAUTION - Failure to follow the instructions could result in personal injury or physical damage to equipment and the environment.

WARNING:
Do not disassemble or modify the product. This may cause the product to malfunction, you may fall unexpectedly and be seriously injured.
Before riding your bicycle, check that the crank arms are not cracked. If there are cracks, the crank arm may break and you may fall off the bicycle.
Be careful not to get parts of your clothing caught in the chain while riding. Otherwise, you may fall off the bicycle.

CAUTION:
Be careful and do not touch the teeth of the sprockets. There is a risk of injury.

Threaded Shimano

Japanese manufacturer produces road, mountain, gravel, trekking, BMX and e-bike groupsets. They also offer a whole series of components and apparel. Their range goes from wheels, footwear, eyewear to backpacks. Shimano is a traditional manufacturer known for their quality work, which is why they are the favourite choice of amateurs and professionals.

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