Shimano bb size

[TAV]

Hi I bought a triple shimano 105 hollowtec fc -5502/5505 I bought a shimano bb-es51 68 113 but its not fitting correctly. I must have bought the wrong size does anyone on here no what one I should have bought cheers.

 

[Cycleops]

What you mean it's not fitting correctly? Is this a road bike?

Edit: On closer inspection I don't think that's a Hollowtech chainset, if it were the drive side would have a long spindle, so might be Octalink I despite being labelled Hollowtech and the BB is Octalink II, or visa versa. Fix is to get the correct BB.
Be aware there are issues with Octalink, they need to be tightened to a very high torque setting, if not they become loose and the steel spindle eventually destroys the soft alloy cranks making them useless. Shimano has now discontinued them.

This is a current Hollowtech chainset

 

[TAV]

OK cheers for the info I didn't know that I had a square bb on it before it's says Hollowtech on the arm though.

 

[TAV]

If you zoom in on the photo it says the Hollowtech 2 has a spindle.

 

[Cycleops]

Well they both do, just that it's part of the RH crank with the Hollowtech II and part of BB on the Octalink.

 

[Jameshow]

Right BB afaik

https://www.wiggle.co.uk/shimano-10...VtYBQBh3TRw34EAQYBSABEgLYSPD_BwE&gclsrc=aw.ds

Could it be it's too short? 113mm rather than 118mm

 

[chriswoody]

The Chainset in your picture is correctly labelled with the Hollowtech One sticker, Hollowtech just means the crankarms are hollow, Hollowtech 11 is the same, but this time with the spindle attached to the drive side crank, rather than the bottom bracket.

This is the tech doc for your crankset:

https://hollandbikeshop.com/images/SI-1DG0C-000-ENG.pdf

This is the BB you need according to that document, as mentioned above you need a 118.5 spindle rather than the 113mm you have bought.

 

[Deleted member 121159]

BB5500 seems to be Octalink V1. bb-es51 is Octalink V2

https://www.sjscycles.co.uk/bottom-...racket-english-thread-137-x-24-triple-118-mm/

 

[TAV]

Cheers for all the info guys yeah it looks like I've gone and bought the wrong size I just went off the bb that was on my dawes audax audax square bb.

 

[TAV]

Which was a triple their a bit expensive

 

[TAV]

Anyone know what the torque setting is needed for this octalink.

 

[chriswoody]

It's all in the technical document I linked to in my post above.

 

[cyclintom]

Hi I bought a triple shimano 105 hollowtec fc -5502/5505 I bought a shimano bb-es51 68 113 but its not fitting correctly. I must have bought the wrong size does anyone on here no what one I should have bought cheers.

Remember that English threads are 1.37" x 24 threads per in and Italian threads (used also on some Belgian bikes) are 36 x 24 You can get really weird bottom brackets for Trek for their carbon fiber bikes and in that case it is best to take them to a Trek dealer.

 

[TAV]

Cheers Guys for all the help it's super helpful.