Shimano UN55 Square Taper Bottom Bracket
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Shimano UN55 Square Taper Bottom Bracket
Multi-Buy Savings!
Code: BBUN55
New, uprated square taper bottom bracket from Shimano.
  • A good quality bottom bracket for traditional chainsets
  • Super-accurate bearings for smooth operation and improved durability
  • Durable, hard-wearing sealed cartridge bottom bracket with square tapered spindle fitting
  • 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
Mr Deang Durable and strong BB, will last for 10 years in my opinion, much stronger than the hollowtech I guess, and easy to install as well. I have fitted it on my hard tail and full suspension
Mr Reilly A solid, reliable fit and forget unit. I have had a UN54 on my Giant for around 3 years and it only recently started creaking. As usual, a quality product from the Big S.
Mrs Howell This Shimano UN55 is a great quality bottom bracket. This is the first replacement bottom bracket for my Trek Pilot road bike it's a good price and was easy to install.(once I'd got the old one out) The unit and the retaining ring are both metal and this was one of my reasons for choosing it. The bike now rides smoothly and quietly, no more crunchy noises! I would reccommend this as it's a well priced product and shimano.
Mr Stenning A good basic bottom bracket. Excellent service from Merlin Cycles as usual.
Mr Griffiths Quick delivery, and good comms.
Peter Old OEM original VP one was rough as a badgers arse after 5 years, this is so smooth in comparison it's transformed the bike.
Mr hopper Replacement square taper BB, no problems at a very good price.