- Shimano BB-UN55 Bottom Bracket British Thread
zoom Shimano BB-UN55 Bottom Bracket British Thread
Shimano BB-UN55 Bottom Bracket British Thread
A good quality bottom bracket for traditional chainsets with super-accurate bearings for smooth operation and improved durability. The BB is also durable, hard-wearing sealed cartridge bottom bracket with square tapered spindle fitting.
Top Features of the Shimano BB-UN55 Bottom Bracket British Thread
- Lightweight hollow spindle
- Maintenance-free sealed cartridge bearing assembly keeps out dirt, mud, and water for long bearing life
- Fast and easy installation without adjustment
- Narrow body allows clearance for cable routing under the bottom bracket
About Bottom Brackets
Bicycle bottom brackets connect the cranks to the bike and allow the crank arms to rotate. There are various sizes of bottom bracket shell on the market, so compatibility needs to be checked. The three most common frame bottom bracket shell widths are 68mm (English threaded road and mtb), 70mm (Italian threaded road) and 73mm (British threaded mtb). There are also many axle shapes and styles, from JIS or ISO square tapers through to the round splined axles such as ISIS or Octalink and then there is the new external cup systems which have the axle built into the crank arms. Some frames are now using the new BB30 system which uses bearings pushed directly into the frame and removes the needs for cups to be threaded into the frame.
About the Shimano brand
Shimano are the makers of the world's most well known cycle component brand. Established in 1921 when the first cycle freewheel was forged. Shimano produce drivetrains, wheels, pedals, shoes, cycling clothing and pretty much every Shimano cycle accessory you can think of! Famous for their top end products ridden by the pro's, Dura-Ace and XTR, which cover both road and MTB's. At Shimano, they're doing everything they can to respond to heightened environmental concerns. Shimano are proud to be a producer of bicycle components that help people to enjoy outdoor sports and interact with nature through healthy non-polluting activities. In their 87 plus years of existence Shimano have accumulated a wealth of technology and product development and expertise that serves as the driving force behind their continually evolving product line.
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- Standard Delivery: Estimated Delivery within 8 working days – $15.01
Spend $76.18 more to qualify for free delivery
- Priority International Delivery: Estimated delivery within 6 working days - $21.63
- Tracked Courier Delivery: Estimated delivery within 4 working days - $34.99
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Goods are shipped from the UK. Does not include delivery charges, local taxes or import duties, if applicable.
More information on International delivery options
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Product Q & A
Ask your questions and share your answers.
I'm looking to replace a BOTTOM BRACKET Sealed cartridge, square taper, 68mm x 103mm
Will this part do the job?
It has a square taper and is marked Chin Hour with the following info:
I advise removing or measuring your current bottom bracket to confirm the measurement required.
Also does the regular Shimano BB tool suit (eg. Cyclus brand shown below) ?
Please email email@example.com for further assistance on this product.
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