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Shimano
UN55 Square Taper Bottom Bracket

Mfg PartNum:
  (3 customer reviews)
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It's hip to be square.

With the Shimano UN55 Square Taper Bottom Bracket, you get a highly durable, smooth-rolling bottom bracket for threaded bottom bracket shells and square-tapered cranksets. The sealed bearing cartridges keep water, dirt, mud, and road grime from penetrating the unit, keeping your bottom bracket rolling grind-free for seasons.

 

Bottom Bracket STD: English (BSA) 

68 x 107mm

Mfg PartNum: EBBUN55B07 

68 X 113mm

Mfg PartNum: EBBUN55B13 

68 X 115mm

Mfg PartNum: EBBUN55B15 

68 X 122.5mm

Mfg PartNum: EBBUN55B22 

73 X 118mm

Mfg PartNum: EBBUN55C18 

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Quality replacement
rating
by MS

Replaced the same un55 which was 6 years old and ridden through winter roads. Smooth. No noise

Reviewed 8/15/2019
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Worked perfectly!
rating
by Mike
Cycling Enthusiast
East coast

Bought this BB to replace an old school square taper axle on an old Univega. Worked perfectly. I dont know why I even thought about buying replacement bearings for the original set up when this sealed bearing was a better replacement.

Reviewed 2/7/2020
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Perfect in every way
rating
by G.Taylor
Rochester Michigan
5 of 6 customers found this review helpful.

Went on line and ordered the part I needed, screwed up and ordered the wrong one , emailed the bikestiresdirect about my mistake and they could not have been more helpful , understanding and quick to respond to straighten out my screw up and insured my order was correct . Perfect transaction .

Reviewed 3/15/2018
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