Search function wasn't a big help. What is the effective spindle length of a shimano bb-5700? Many thanks.

BB-5700 is only a pair of external bearing cups and has no spindle. The spindle is built into the drive side crank arm of Hollowtech II cranks and they are available in double and triple formats.

Road Bike Action | The Bottom Bracket Breakdown
Notes: The most ‘standard’ bottom bracket shell width is currently 68mm. Once the external cups are installed, it measures out to 86mm wide.

"effective spindle length" means what the spindle length would be if there was a spindle. The question was not whether this external bearing has a spindle. A for effort.

@Slash5 - many thanks.

Not enough information....

What kind of spindle would you be trying to be effective to?

Square taper, Octalink, ISIS (haha) double or triple? This type of BB doesn't directly correspond to any of those.

It is most commonly used for a Hollowtech II Shimano road double or triple if that helps.

BTW: the article linked while accurate certainly hypes the new press in bearings.

A 68mm English road BB or a 73mm English Mountain BB will always have a crank available from one of the big 3 mainstream component manufacturers.

C for not understanding. There is no "effective spindle length" for these bottom brackets. If you need a number, try 112.7 mm which is the length of the built-in spindle on an FC-5703 105 triple crank measured from the bearing seat to the end of the spindle. Does that help?

Uhh, the spindle that would exist at that length if one was there. The whole "effective" qualifier is really throwing people off.

C for me or the other poster?

Effective spindle length is a theoretical length, ie of course it doesn't exist. To answer your question, yes the information helps but related to a follow up question rather than the OP. Many thanks either way.

Your question was poorly conceived and your snarky f/u was unwarranted. With that said, maybe if you just explained your issue (use this crank with this bike or whatever) a helpful reply would not be hindered by your lack of proper terminology.

Ehhhh, sure thing there, junior. I'll try to consult you next time.

Sure, don't mind helping. Just try to learn enough to know what to ask! That is what you were doing, right? Asking for help?

Shimano's exploded view of this part, which one could hope had the desired information, is, by mistake, the same as the front chainwheel's, findable at SHIMANO Dealer's Manual / User's Manual

I have a 5700 laying here, but can't figure out where exactly OP wants measurement from.

If measured from the center of the spindle's splined clamping area on non-driveside to the theoretical center of where the spindle is pressed into the driveside arm, it would be asymmetrical from centerline. The non-driveside spindle clamping area is wider than the driveside's pressed interface.

I believe on more modern 5800 version (and 6800), the driveside is even shallower and more asymmetrical (designed with crankarm face being flatter for more shoe/heel clearance)...but I'd have to take one off to measure.

Double? Maybe 109.5.

Righteous, many thanks.