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Shimano SM-BB91-41A Bottom Bracket

Item #: BB260P00
Availability Please make a selection
Quantity   Out of stock.

Shimano XTR SM-BB91-41A Bottom Bracket

Shimano bottom bracket for Press-Fit applications. This item allows you to mount Shimano Hollowtech II mountain bike cranksets to select MTB frames which use Press-Fit bottom brackets.

  • Manufacturers part number ISMBB9141A
  • Please note that this item will not work unless your frame is specifically built to the BB91 standard

REVIEW SNAPSHOT®

by PowerReviews
Shimano SM-BB91-41A Bottom Bracket
 
4.0

(based on 6 reviews)

Ratings Distribution

  • 5 Stars

     

    (3)

  • 4 Stars

     

    (2)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (1)

100%

of respondents would recommend this to a friend.

Pros

  • Lightweight (4)

Cons

No Cons

Best Uses

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

Reviewed by 6 customers

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Displaying reviews 1-6

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5.0

Easy enough to install and works well

By Eric P.

from Clifton Park, NY

About Me Avid Cyclist

Verified Reviewer

Pros

  • Lightweight

Cons

    Best Uses

    • Mountain biking

    Comments about Shimano SM-BB91-41A Bottom Bracket:

    I installed these with the Park Tools (headset press and bottom bracket remover that comes with the necessary #669 bushings) and had no problems. The bike rides great, so the bearings are doing their job great so far. Using these with XT cranks.

    • Was this a gift?:
    • No
     
    5.0

    Very Smooth

    By Yes

    from HiDesert

    About Me Avid Cyclist

    Verified Buyer

    Pros

    • Highly Compatible
    • Lightweight

    Cons

      Best Uses

      • Stock Upgrade

      Comments about Shimano SM-BB91-41A Bottom Bracket:

      Really light and easy to install

      • Was this a gift?:
      • No
       
      4.0

      We will see

      By Al

      from SoCal

      About Me Avid Cyclist

      Verified Reviewer

      Pros

      • Extremely Easy To Install
      • Highly Compatible
      • Lightweight

      Cons

        Best Uses

        • Casual Trails
        • Cross Country
        • Single Track
        • Stock Replacement

        Comments about Shimano SM-BB91-41A Bottom Bracket:

        Can't speak to the durability yet-just installed it today. This is an upgrade from stock. After seeing how this is sealed, its a crank issue,(pre-mature wear)not a bottom bracket issue. Got 11 months out of the stock one.

        • Was this a gift?:
        • No
         
        4.0

        Easy to install, smooth ride

        By Simon

        from Melbourne, Australia

        About Me Avid Cyclist

        Verified Buyer

        Pros

        • Easy to Install
        • Lightweight

        Cons

        • None yet

        Best Uses

        • Casual Trails
        • Cross Country
        • Downhill
        • Free Riding
        • Single Track

        Comments about Shimano SM-BB91-41A Bottom Bracket:

        I bought this bottom bracket to replace the existing bearings on my Pivot Mach 5. I also purchased the two Park tools (one for removing a bottom bracket, the other for pressing either a bottom bracket or headset bearings)...and with these tools, the BB was easy to install. It provides a nice smooth feel...with no issues yet!

        • Was this a gift?:
        • No
         
        5.0

        Easy to Install

        By Mark the Biker

        from Toronto, Ontario

        Verified Buyer

        Pros

        • Ease of installation

        Cons

        • Not as smooth as BB30

        Best Uses

          Comments about Shimano SM-BB91-41A Bottom Bracket:

          I like the design for ease of installation. Very similar to installing bb30. However, the smoothness of the bearings is not quite comparable to the bb30 standard. A close 2nd however. The future is in press fit bearings

          (2 of 2 customers found this review helpful)

           
          1.0

          have gone through...

          By Joseph

          from Albuquerque, Nm United States

          Comments about Shimano SM-BB91-41A Bottom Bracket:

          have gone through two of these bb. first came with the bike. lasted 500 miles when nondrive bearings started seizing up. bought the second. within 200 miles nondrive side also began seizing up. these cannot be serviced because you can't remove the bearings from the cups, doing so will EASILY damage your cups or the outside seals, all of which are made of very fragile plastic. damage any of these and the bb is useless. seals are terrible.will try metal based bb cups. ie fsa, but not sure if compatible with xt cranks. xxf from china. will not go back to these. wish chris king makes them.

          Displaying reviews 1-6

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          Free Shipping Offer

          Get free Standard Shipping with your $50 purchase today! Just choose Standard Shipping during 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.