Shimano BB-UN55 Cartridge Bottom Bracket

Item # SH-BBUN55
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$23.49
MSRP: $23.49


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Shimano BB-UN55 Cartridge Bottom Bracket
The UN55 bottom bracket is an improvement over the tried and true UN54. The sealed cartridge unit makes a great replacement part for hybrids, road bikes and older mountain bikes. The sealed cartridge bearings lock out contaminants like water and dirt, helping this bottom bracket last longer.
  • Maintenance-free sealed cartridge bearings with high-efficiency rubber seals
  • Square taper chromoly spindle
Shimano BB-UN55 Cartridge Bottom Bracket
  • WEIGHT 161g
  • MATERIAL Steel spindle
  • COMPATIBILITY 68mm bottom bracket shell
  • BB - COMPATIBILITY Square taper cranksets
  • RINGS None
  • RING MATERIAL N/A
  • LENGTHS 113mm
  • BCD N/A
  • Rating 4

REVIEW SNAPSHOT®

by PowerReviews
Shimano BB-UN55 Cartridge Bottom Bracket
 
3.8

(based on 5 reviews)

60%

of respondents would recommend this to a friend.

Pros

No Pros

Cons

No Cons

Best Uses

No Best Uses
    • Reviewer Profile:
    • Avid cyclist (3)
    • Was this a gift?:
    • No (5)

Reviewed by 5 customers

Displaying reviews 1-5

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2.0

I torched mine in one season

By Central Ohio Mountain Biker

from Columbus

About Me Avid Cyclist

Pros

    Cons

    • Wears Out Quickly

    Best Uses

      Comments about Shimano BB-UN55 Cartridge Bottom Bracket:

      I wish they still made the heavier duty bearings in this style of BB. You can only get the 55 and it just doesn't hold up to a bigger rider (I am trying to get smaller, but not there yet)

      • Cycling Style:
      • Speed Oriented
      • Was this a gift?:
      • No

      Comment on this reviewHelp Icon

      (0 of 1 customers found this review helpful)

       
      3.0

      Does not fit

      By just some old dude

      from Tennessee

      About Me Casual/ Recreational

      See all my reviews

      Verified Buyer

      Comments about Shimano BB-UN55 Cartridge Bottom Bracket:

      Despite very friendly tech support recommending the part, it did not fit my old ~1992 Mongoose Switchback.

      • Cycling Style:
      • Comfort Oriented
      • Was this a gift?:
      • No

      Comment on this reviewHelp Icon

       
      5.0

      It is what it is.

      By Raleigh Guy

      from Mpls, MN

      About Me Avid Cyclist

      See all my reviews

      Verified Buyer

      Pros

      • Durable

      Cons

        Best Uses

          Comments about Shimano BB-UN55 Cartridge Bottom Bracket:

          It's a Shimano Bottom Bracket. It is good quality and fits. No problems.

          • Cycling Style:
          • Comfort Oriented
          • Was this a gift?:
          • No

          Comment on this reviewHelp Icon

           
          4.0

          Good Stuff

          By the menace

          from n. florida

          About Me Avid Cyclist

          Verified Buyer

          Pros

          • Versatile
          • Worked On An Old Frame

          Cons

            Best Uses

            • Anything That Needs It
            • Commuting/City
            • Mountain Biking
            • Road Biking

            Comments about Shimano BB-UN55 Cartridge Bottom Bracket:

            I put this on an old Miyata frame that I converted to a single speed road bike. made the bike soo much better

            • Cycling Style:
            • Speed Oriented
            • Was this a gift?:
            • No

            Comment on this reviewHelp Icon

            (1 of 1 customers found this review helpful)

             
            5.0

            Oldie but goodie

            By Doug

            from Chester, WV.

            About Me Casual/ Recreational

            Verified Buyer

            Pros

              Cons

                Best Uses

                • Commuting/City

                Comments about Shimano BB-UN55 Cartridge Bottom Bracket:

                Thank you Nashbar for still stocking retro parts-sq/taper bottom bracket-to keep my '86 C-Dale MTB/commuter on the road.

                • Was this a gift?:
                • No

                Comment on this reviewHelp Icon

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                Shimano BB-UN55 Cartridge Bottom Bracket

                Shimano BB-UN55 Cartridge Bottom Bracket

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