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Shimano UN55 Bottom Bracket

Item #: BB257F01
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USD$22.99 8% off USD$24.99 msrp
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Customers Also Bought
High quality Shimano sealed bottom bracket (square taper). Extra strong Aluminum (not plastic) non drive cup. Please choose width and spindle length.
  • English Threaded
  • REVIEW SNAPSHOT®

    by PowerReviews
    Shimano UN55 Bottom Bracket
     
    4.6

    (based on 10 reviews)

    Ratings Distribution

    • 5 Stars

       

      (7)

    • 4 Stars

       

      (2)

    • 3 Stars

       

      (1)

    • 2 Stars

       

      (0)

    • 1 Stars

       

      (0)

    100%

    of respondents would recommend this to a friend.

    Pros

    • Durable (3)
    • Easy to install (3)

    Cons

      Best Uses

          • Reviewer Profile:
          • Avid cyclist (3)
          • Was this a gift?:
          • No (4)

        Most Liked Positive Review

         

        5 star rating

        Bought this BB and so far it is a winner. Very smooth and more importantly, very strong. I put a lot of downward force on my pedals and this BB is stiff and strong...Read complete review

        Bought this BB and so far it is a winner. Very smooth and more importantly, very strong. I put a lot of downward force on my pedals and this BB is stiff and strong. All my power goes to the wheels.

        VS

        Most Liked Negative Review

         

        Affordable but heavy

        Used this BB when rebuilding an entry level Trek 1000. Shimano quality is there as you would expect. I believe it will last a long time.

        Used this BB when rebuilding an entry level Trek 1000. Shimano quality is there as you would expect. I believe it will last a long time.

        Reviewed by 10 customers

        Sort by

        Displaying reviews 1-10

        Back to top

         
        4.0

        Works as expected

        By Steverib

        from Iowa

        About Me Commuter

        Verified Buyer

        Pros

          Cons

            Best Uses

              Comments about Shimano UN55 Bottom Bracket:

              Installed fine, working fine.

               
              3.0

              Affordable but heavy

              By fl-mitchells

              from Palatka, FL

              About Me Avid Cyclist

              Verified Buyer

              Pros

              • Easy To Install

              Cons

              • Heavy

              Best Uses

                Comments about Shimano UN55 Bottom Bracket:

                Used this BB when rebuilding an entry level Trek 1000. Shimano quality is there as you would expect. I believe it will last a long time.

                • Was this a gift?:
                • No
                 
                5.0

                Basic Bottom Bracket

                By Sean

                from Chino

                About Me Avid Cyclist

                Verified Buyer

                Pros

                • Durable
                • Easy To Install

                Cons

                • NONE

                Best Uses

                • Casual Riding

                Comments about Shimano UN55 Bottom Bracket:

                This was used on a retro build I did. Nothing to write home about but a solid basic bottom bracket.

                • Was this a gift?:
                • No
                 
                5.0

                JUST WHAT ONE NEEDS FOR THEIR SQ TAPER

                By CHRIS

                from ACWORTH GA

                About Me Competitive Cyclist

                Verified Buyer

                Pros

                • Durable

                Cons

                  Best Uses

                  • Mountain Biking

                  Comments about Shimano UN55 Bottom Bracket:

                  If you got an old BB that is cracking and creeeking. You have a square taper crankset then this is the BB you want. Easy to install. Will last a very long time. Very durable. So get it and get back to riding!!

                  • Was this a gift?:
                  • No
                   
                  5.0

                  It works

                  By Sprocket

                  from Albuquerque, NM

                  About Me Avid Cyclist

                  Verified Reviewer

                  Pros

                  • Durable
                  • Easy To Install
                  • Solid

                  Cons

                    Best Uses

                    • Mountain Biking

                    Comments about Shimano UN55 Bottom Bracket:

                    This bottom bracket works, just as it should. The metal shell gives more confidence than the plastic one on the lower model. It feels solid and strong. No complaints.

                    • Was this a gift?:
                    • No
                     
                    5.0

                    Best Value

                    By kj

                    from Boise, ID

                    Verified Reviewer

                    Pros

                    • No plastic
                    • reasonable price
                    • works

                    Cons

                    • none

                    Best Uses

                      Comments about Shimano UN55 Bottom Bracket:

                      I've had a couple with plastic, and although I didn't have problems with them, they just didn't inspire confidence. For a few dollars more, you can get this one that feels better made in all respects. Fits great, looks better installed than others, and has worked well for me for about a year so far.

                       
                      5.0

                      Works well

                      By Chunker

                      from Canton, OH

                      Verified Reviewer

                      Comments about Shimano UN55 Bottom Bracket:

                      I purchased this to replace the bottom bracket on my single speed road bike. Install was simple and all is well. I have approximately 250 miles on the new bottom bracket and it is as quiet as when I installed it.

                       
                      5.0

                      Smooooooth

                      By Hemi345

                      from Colorado

                      Verified Buyer

                      Pros

                      • Metalcup On Nondrive Side

                      Cons

                        Best Uses

                          Comments about Shimano UN55 Bottom Bracket:

                          Easy install and perfect fit. Replaced a UN73 with this in my GT Zaskar LE hardtail and have been happy with it so far.

                           
                          4.0

                          works like its supposed to

                          By johnyluujack

                          from Charlotte, NC

                          Verified Buyer

                          Comments about Shimano UN55 Bottom Bracket:

                          Decent BB, not much else to say. If the specs fit your bike, this will work fine.

                          (1 of 2 customers found this review helpful)

                           
                          5.0

                          5 star rating

                          By Phil the Biker

                          from San CArlos, CA

                          Verified Buyer

                          Pros

                          • Smooth
                          • Strong

                          Cons

                          • none

                          Best Uses

                          • Everyday use

                          Comments about Shimano UN55 Bottom Bracket:

                          Bought this BB and so far it is a winner. Very smooth and more importantly, very strong. I put a lot of downward force on my pedals and this BB is stiff and strong. All my power goes to the wheels.

                          Displaying reviews 1-10

                          Back to top

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                          Get free shipping with your $50 purchase today when you choose Standard Shipping at checkout. Please note this offer is only available to physical shipping addresses in the 48 continental United States (no PO Boxes), and oversize charges still apply on some heavy/large items