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Shimano XT SM-BB70 Bottom Bracket

Item #: BB276E00
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USD$24.99 17% off USD$29.99 msrp
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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 SM-BB70 Bottom Bracket
 
4.5

(based on 12 reviews)

Ratings Distribution

  • 5 Stars

     

    (6)

  • 4 Stars

     

    (6)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (0)

100%

of respondents would recommend this to a friend.

Pros

  • Easy to install (9)
  • Lightweight (7)
  • Durable (5)
  • Attractive (3)

Cons

    Best Uses

    • Mountain biking (7)
    • Casual riding (3)
      • Reviewer Profile:
      • Avid cyclist (5), Casual/ recreational (3)
      • Was this a gift?:
      • No (9)

    Reviewed by 12 customers

    Sort by

    Displaying reviews 1-10

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    4.0

    Good quality product at a great price!

    By Webmeister

    from Vancouver BC

    About Me Avid Cyclist

    Verified Buyer

    Pros

    • Durable
    • Easy To Install
    • Excellent Instructions

    Cons

      Best Uses

      • Casual Riding
      • Mountain Biking

      Comments about Shimano XT SM-BB70 Bottom Bracket:

      I replaced the original XT bracket after 5 years and am entirely happy with the stock product. Spending double or more for a "boutique brand" seems unnecessary and wasteful.

      • Was this a gift?:
      • No
       
      5.0

      Easy replacement and a perfect fit

      By Mike H

      from St. Louis, MO

      About Me Casual/ Recreational

      Verified Buyer

      Pros

      • Easy To Install

      Cons

        Best Uses

          Comments about Shimano XT SM-BB70 Bottom Bracket:

          This bottom bracket was a replacement BB for my 2009 Specialized Epic, which had a bad left side bearing. Installation was simple with the Park BBT-9 bottom bracket tool. Took about 10 minutes.

          • Was this a gift?:
          • No

          (0 of 1 customers found this review helpful)

           
          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 SM-BB70 Bottom Bracket:

            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 SM-BB70 Bottom Bracket:

              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

              (0 of 1 customers found this review helpful)

               
              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 SM-BB70 Bottom Bracket:

                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 SM-BB70 Bottom Bracket:

                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 SM-BB70 Bottom Bracket:

                    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 SM-BB70 Bottom Bracket:

                    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 SM-BB70 Bottom Bracket:

                      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 SM-BB70 Bottom Bracket:

                        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.

                        Displaying reviews 1-10

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                        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.