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Shimano BB51 Deore Bottom Bracket

Avg: 3.0/5

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From $18.35

RRP $23.53

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Genuine Shimano HollowTech II bottom bracket assembly. •Set includes left and right hand cups, spacers, inner cover, and inner O-rings. •Sealed cups keep out dirt and water •Maintenance free •Compatible with 68mm and 73mm shell •Durable silver a ....Read More...

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68/73mm Shell

$18.35

RRP $23.53

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Add to Basket - Shimano BB51 Deore Bottom Bracket - 68/73mm Shell

Shimano Deore Bottom Bracket Set BB51

Genuine Shimano HollowTech II bottom bracket assembly.

Shimano Deore Bottom Bracket Set BB51 Features:

Set includes left and right hand cups, spacers, inner cover, and inner O-rings.
Sealed cups keep out dirt and water
Maintenance free
Compatible with 68mm and 73mm shell
Durable silver anodised finish
Easy installation

Buy Shimano Deore Bottom Bracket Set BB51 from Chain Reaction Cycles, the worlds largest online bicycle store.

Mike from Japan Owner 12 July 2012 07:54

I'm on my third BB51, I have given a crank-set that this was in a bad review before, but I think now I was too critical and the problems I had weren't really with the BB itself. I am an avid fan of this BB now - I do some hard cross country with some killer hills and occasional wet conditions - this BB takes the punishment and when the time comes to change it is so easy to remove and change - I gave it a 5 star rating because it's so cheap and easy to install/remove.

toddatron from Japan Owner 16 June 2012 03:16

I say GOOD.. 4 stars. Yea they last about 4 to 6 months hard commuting in rain and heavy rider with cargo. For the price I got two and will swap them out every season. If you want spend 100 dollars or more on a BB do it and don't complain when your swapping bearings and seals eventually. FYI this is the direct replacement for the BB50 that came on my DEORE FC-M533 hollow crank which had no numbers on it.

Dougal from United Kingdom Owner 01 December 2011 13:22

You can't really fault the BB, just because of its rediculously low price. I bought one last year and its done the daily commute for a year, plus a fair amount of aggressive XC riding, a total of about 1200 - 1500 miles. The non drive side bearings have now gone, but as I said before, it's so cheap that it doesn't really matter. It's also very easy to install and remove.

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Jonny Watson from United Kingdom asks

how do i measure the size of a BB from the frame - if i havent got an old BB to measure????

CRC Replies:

To get the correct BB size you will need to measure the Width of the bottom bracket on the frame. It will be 68mm or 73mm on a Mountain Bike. The axle length depends on the cranks, as a guide, most modern ISIS cranks use a 113mm but there are exceptions