The Shimano UN300 is a solid mid-range bottom bracket that handles everyday riding without fuss. It's a cartridge design, which means it's straightforward to install and replace when it eventually wears out. The sealed bearing construction keeps dirt and water out, so it'll last longer than an unsealed bracket, especially if you ride in wet British weather.
The Shimano UN300 is a solid mid-range bottom bracket that handles everyday riding without fuss. It's a cartridge design, which means it's straightforward to install and replace when it eventually wears out. The sealed bearing construction keeps dirt and water out, so it'll last longer than an unsealed bracket, especially if you ride in wet British weather.
This bracket suits casual commuters and recreational riders who want reliable performance without spending a lot. It works with a standard 68mm shell and comes set up for 115mm chainline, which is the most common setup for bikes with singl
Free same-day Click & Collect. Order online and collect from our London workshop, usually ready within a couple of hours. We will email you the moment it is ready.
Home delivery. Dispatched the same working day on orders placed before 3pm. Standard UK delivery is tracked and typically arrives in 2 to 3 working days.
Fitting while you wait. Buying a part you would rather not fit yourself? Our mechanics can fit most parts on the spot. Just ask when you collect.
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