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Shimano XT SM-BB70 Bottom Bracket

Item #: BB276E00
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USD$29.99
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Customers Also Bought
The standard XT bottom bracket is a mainstay of modern mountain biking. This replacement set of Hollowtech II outboard bearing bottom bracket cups for Shimano XT M770 series of cranksets offers smooth, stiff performance for all Shimano cranks. Will also work for any Hollowtech II type mountain bike cranksets such as Shimano Deore or XTR. Note: Not compatible with Road type Hollowtech cranks.
  • Includes Left and Right Cups
  • English Threaded
  • Fits 68 or 73mm bottom bracket shells (most modern mountain bikes)
  • SM-BB70

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REVIEW SNAPSHOT®

by PowerReviews
Shimano XT M770 External Bearing BB Htii
 
4.5

(based on 10 reviews)

Ratings Distribution

  • 5 Stars

     

    (5)

  • 4 Stars

     

    (5)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (0)

100%

of respondents would recommend this to a friend.

Pros

  • Easy to install (7)
  • Lightweight (7)
  • Durable (4)
  • Attractive (3)

Cons

    Best Uses

    • Mountain biking (6)
      • Reviewer Profile:
      • Avid cyclist (4)
      • Was this a gift?:
      • No (7)

    Reviewed by 10 customers

    Sort by

    Displaying reviews 1-10

    Back to top

     
    4.0

    Gets the job done.

    By MTB or road, let's do this

    from Panama City Beach, FL

    About Me Avid Cyclist

    Verified Reviewer

    Pros

    • Durable
    • Easy To Install
    • Lightweight

    Cons

      Best Uses

      • Mountain Biking

      Comments about Shimano XT M770 External Bearing BB Htii:

      It gets the job done.

      • Was this a gift?:
      • No
       
      5.0

      Great Upgrade

      By RigFlipper

      from Lansing, MI

      About Me Casual/ Recreational

      Verified Reviewer

      Pros

      • Attractive Design
      • Durable
      • Easy To Install
      • Lightweight

      Cons

        Best Uses

        • Mountain Biking

        Comments about Shimano XT M770 External Bearing BB Htii:

        Very Stiff and a huge weight difference. Replaced an old ISIS BB with this. Was really surprised at how easy it was to install, although I did need to pickup the correct BB wrench from Park (BBT-9).

        • Was this a gift?:
        • No
         
        5.0

        Dont think get this one

        By TVDOG

        from RIVERSIDE

        About Me Casual/ Recreational

        Verified Buyer

        Pros

        • Durable
        • Easy To Install
        • Lightweight

        Cons

          Best Uses

          • Casual Riding
          • Mountain Biking
          • Racing

          Comments about Shimano XT M770 External Bearing BB Htii:

          loved it so much i put the same one back on smooth like butter after a short brake in readj. it to my liking a have not looked back yet

          • Was this a gift?:
          • No

          (1 of 2 customers found this review helpful)

           
          4.0

          smooth and light

          By Maverick73

          from Quito - Ecuador

          About Me Competitive Cyclist

          Verified Buyer

          Pros

          • Clear Instructions
          • Easy To Install
          • Lightweight

          Cons

          • Bearings Hard To Find
          • Cost Of Bearings
          • Not Enough Grease

          Best Uses

          • First Step To Go Pro
          • Mountain Biking
          • Upgrade

          Comments about Shimano XT M770 External Bearing BB Htii:

          This is a good one to start thinking in going pro... XT series matches with most of my expectations within light weight durability and performance. It's easy to install and almost maintainance free.
          Notice that manufacturer does not recommend to dismantle it or try to fix it, but you must know that the only problem this stuff has is that bearings would get krunchi with poor maintenance and proper cleaning, but if it's so, you can find replacing bearings by half price or less and you can extract bearings off the cups and you'll have brand new bearings for one other 10000 miles!

          • Was this a gift?:
          • No

          (1 of 1 customers found this review helpful)

           
          5.0

          Smooth

          By Mr S

          from Ontario, Canada

          About Me Avid Cyclist

          Verified Buyer

          Pros

          • Easy To Install
          • Lightweight
          • Smooth

          Cons

            Best Uses

              Comments about Shimano XT M770 External Bearing BB Htii:

              Used this BB along with an XT crankset and it's very smooth. Easy to install. You need the external BB tool that grips around the outside teeth.

              • Was this a gift?:
              • No

              (1 of 1 customers found this review helpful)

               
              5.0

              nice b/b

              By C.Mac

              from Hornlake,Ms.

              About Me Avid Cyclist

              Verified Reviewer

              Pros

              • Attractive Design
              • Durable
              • Easy To Install

              Cons

              • None yet

              Best Uses

              • Casual Riding
              • Mountain Biking
              • Upgrade

              Comments about Shimano XT M770 External Bearing BB Htii:

              easy to install ,quality looks great .is very smooth

              • Was this a gift?:
              • No

              (1 of 1 customers found this review helpful)

               
              4.0

              Solid BB

              By Virginia MTBer

              from Northern, VA

              About Me Avid Cyclist

              Verified Buyer

              Pros

              • Attractive Design
              • Easy To Install
              • Lightweight

              Cons

                Best Uses

                • Mountain Biking

                Comments about Shimano XT M770 External Bearing BB Htii:

                I like the design of the Shimano MTB crankset and BB. I like this BB as it is easy for a home mechanic to maintain and replace with only a single special tool. I've used a Shimano drivetrain on all my bikes, so I can't comment for comparison on durability. I tend to get around 1200-1500 miles out of the XT BBs that I have had.

                • Was this a gift?:
                • No

                (1 of 1 customers found this review helpful)

                 
                4.0

                Just works

                By bubbles

                from Canada

                Verified Buyer

                Pros

                • Light
                • Serviceable Actually
                • Simple

                Cons

                • Avoid Overtightening

                Best Uses

                  Comments about Shimano XT M770 External Bearing BB Htii:

                  This product is pretty good. It says it's not serviceable, but you can pop off the seals and relube the bearing. Don't overtighten.

                  (1 of 1 customers found this review helpful)

                   
                  5.0

                  Exactly as Ordered...Arrived Fast

                  By Meatball

                  from Baltimore, MD

                  Verified Buyer

                  Comments about Shimano XT M770 External Bearing BB Htii:

                  Price was comparable...ordered enough stuff for free shipping....Direct replacement on my 2008 Jamis Dakar XAM 1.0. The first Bottom Bracket lasted 4 years through East Coast Mud and winters so I can't complain.

                  (1 of 1 customers found this review helpful)

                   
                  4.0

                  smooth

                  By cathy

                  from hercules, no ca

                  Verified Reviewer

                  Pros

                  • Smooth

                  Cons

                    Best Uses

                      Comments about Shimano XT M770 External Bearing BB Htii:

                      i replaced my old slx bb with these. made a big difference

                      Displaying reviews 1-10

                      Back to top

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