BB spindle length

[Southside Mike]

I need to replace the bb on my Sirrus - it's a 68mm cartridge square taper ( English). The spindle length is 111mm and this doesn't seem easily available. Any suggestions as to whether I'd be better going for 110 or 113?

 

[Leaway2]

Personally, I would use either. I am sure the tapers will fit on a different position each time you fit them due to wear, stretch in the cranks and the amount of humpty you put on the screws.
A mm is such a small amount.
Fit one and forget it.

 

[Poacher]

A difference of 3mm is neither here nor there! Assuming your bb is still fitted, check the chain line. Would it be better moved inwards a smidgeon? Go for the 110. Would a slight outwards adjustment be better? Go for the 113. If in doubt, allow for future wear and tear and get the 113.

 

[Nigelnaturist]

Mine should be 116mm but have fitted 115mm and its fine.

 

[Leaway2]

Which type are you looking at? Personally I don't like the Shimano UN55. The reason I dont like them is the way the non drive side is supported (or not) by the cup. I know there is a lot of debate on this, but I was never happy and replaced it with a Tange.

 

[Nigelnaturist]

I can't remember, I think its a UN55 its been fine.