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  • Shimano ES51 Octalink Bottom Bracket
  • Shimano ES51 Octalink Bottom Bracket
NOW$31.49
  • RRP$63.99
  • |
  • SAVE51%

Select  Colour
Select  Option
Italian Thread
English Thread
English Thread - E-Type
Select  Size
70 x 113mm
68 x 121mm
70 x 118mm
73 x 118mm
70 x 121mm
68 x 113mm
68 x 118mm
73 x 113mm
  • IN STOCK(5+)

  • right This item ships to United States of America
  • right Shipping amount : $9.99
  • right 365 DAYS to return or exchange
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Shimano ES51 Octalink Bottom Bracket

8-Spline Interface: Oversize axle with 8-splines provides a more rigid interface between the crank arm and bottom bracket.

Shimano ES51 Octalink Bottom Bracket Specifications:

  • V2 MTB compatible
  • E-type: no
  • Chain Line: 47.5 & 50mm
  • B.B. Shell Width: 73/70/68mm
  • Spindle Length: 113, 118, 121mm
  • Spindle: 22.2 chrome-moly steel/hollow type adapter aluminium

Buy Shimano ES51 Octalink Bottom Brackets from Chain Reaction Cycles, the world's largest online bicycle store.

  • Colour: Silver
  • Size: 70 x 113mm, 68 x 121mm, 70 x 118mm, 73 x 118mm, 70 x 121mm, 68 x 113mm, 68 x 118mm, 73 x 113mm
  • Option: Italian Thread, English Thread, English Thread - E-Type
Rated 3.6 out of 5 by 28 reviewers.
Rated 4 out of 5 by Muy de vez en cuando el pedal avanza más de la cuenta Como me pasaba con el anterior pedalier, de vez en cuando a media pedaleada noto que el pedal avanza más de lo que debería, como si el pedalier girar más de la cuenta; puede que sea cosa de mi bici. 26 November 2013
Rated 5 out of 5 by great upgrade Bought this to replace original (noisey) square taper BB on my trek. Fitted perfectly. You need to do your homework before ordering as there are various size options ( frame width at BB & overall width) my frame width is 68m & overall bracket width was 121mm. Fitting is straight forward. Note the non drive side retaining ring (black) is plastic & its threads should not be greased when fitting. the other side can be greased as normal. With the right tools this is a simple job to do. 01 November 2013
Rated 5 out of 5 by What's not to like? So it's not a 2 piece crank? So you can't change the bearings? So what? It's cheap, to buy, easy to fit, maintenance free which means more time riding less time faffing. What's not to like? 04 October 2013
Rated 4 out of 5 by Cheap and works Had it 4 months and hasn't broken yet. Hasn't been put through too much though. 21 April 2010
Rated 5 out of 5 by Unable to try but no complaints else where. The item is exactly what was stated, brand new & boxed, it arrived very quickly. After removal of the original bottom bracket on my bike; this sealed bearing fitted without any problems. The bearing feels good when twisting, unfortunately I decided to order a new front set from another trader not associated with Chain Reaction & I am still waiting after being assured it was posted on the same day as Chain Reaction's item. Guess I should have purchased all from Chain Reaction, chasing the bargain!!! Well done Chain Reaction, I also sent a personal e-mail to thank Chain Reaction's staff. 18 April 2010
Rated 4 out of 5 by Excellent kit. Just replaced the original unit on my Trek. Easy to change & if lasts as well (2yrs) then this is an ace bit of kit. 18 April 2010
Rated 3 out of 5 by todo correcto todo correcto 08 April 2010
Rated 4 out of 5 by Works Fine, Adapter Protrudes The model supplied was a BB-ES51-K. These are designed for bikes running a chain-guard so assume an E-type plate will be positioned between the drive side and bottom bracket shell, offsetting the BB drive side rim 1.5-2mm. When the chain-guard plate is not present (as it isn't on any MTB) this means the left side adapter can't screw up flush with the BB shell. This does not affect the quality, or fitting of the unit at all. It just seems wrong when you install it, even though it's fine. Solid unit at bargain price. 26 October 2009
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3 Questions : 3 Answers

Product Q&A

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Hi, can I use the ES51 as a direct replacement for a BB-ES25? Sizes of my unit below, many thanks Danny Sizes are 68 BC1.37 x 24 with a length left to right of 118.
Age: 35 to 44
Gender: Male
Attitude: Passionate and Obsessive
8 months ago
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Answer: 
This bottom bracket will act as a direct replacment and upgrade from a BB-ES25.
8 months ago
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Gender: Male
7 months ago
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Naas,IE
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Answer: 
The FC-M430 has a octalink bottom bracket system so this should work fine. The only thing you need to make sure is the correct size is selected. If you need help with this contact us at tech@chainreactioncycles.com
7 months ago
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Can't find a es30 68x113 so was looking for one with the same fitting for giant xtc
8 months ago
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Answer: 
Yes, the 'Shimano ES51 Octalink Bottom Bracket' would have the same fitting as the Shimano ES30 Octalink Bottom Bracket, the ES51would be a newer version of the Shimano Octalink Bottom Brackets.
8 months ago
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