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Shimano

Shimano BB-UN300 Square Taper Bottom Bracket

£10.99
Size

Delivery & shipping info
How quickly will you dispatch my order?

If you place your order before 3 pm on any weekday we will dispatch your order the very same day!

Anything after this time will be despatched the next day.

Please note: this applies to the working week i.e. Monday – Friday and dispatch times may vary following a bank holiday.

How much does delivery cost?

Nothing! Our standard U.K. delivery (available on all items) is free!

Need it faster? No problem! We also offer next day delivery from £2.50!

International delivery: Calculated at checkout

Need more help?

Whether you need some help with a product query such as sizing or have questions and comments about our services, our customer services team is here to help. You can contact us by phone, email, or live chat.

Phone: 01384 476 267

Email: info@sportandleisure.com

SKU: BB30068
EAN: 4550170619329

Description
Shimano BB-UN300 Square Taper Bottom Bracket

The Shimano BB-UN300 Square Taper Bottom Bracket is a durable, low-maintenance replacement designed for bicycles with traditional square taper cranksets. Ideal for commuter bikes, touring bikes, classic road bikes and mountain bikes, it provides smooth, reliable crankset rotation and long-lasting performance.

Featuring a sealed cartridge bearing assembly, the BB-UN300 helps protect its internal components from dirt, mud and water, reducing wear and eliminating the need for regular bearing maintenance. Its precision bearings ensure smooth operation, while the robust construction provides dependable performance for everyday cycling.

  • Model: BB-UN300
  • Bottom bracket type: Sealed cartridge
  • Axle interface: Square taper
  • Bottom bracket shell width: 68mm
  • Spindle length: 113mm
  • Bearing type: Sealed cartridge bearings
  • Maintenance: Maintenance-free sealed bearing assembly
  • Installation: Cartridge design requiring no bearing adjustment
  • Intended use: Road, MTB, touring and commuter bikes
  • Compatibility: Square taper cranksets requiring a 113mm spindle
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