Bicycle Mechanics - How can this be? splined/square tapered

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pj7
08-18-07, 05:36 PM
My crankset is the Shimano FC-M440 (engraved right on the crank arm) and everything I have found tells me that this is a square tapered crankset.
But when I take the crank bolt out it looks nothing like a Sq-Tapered deal, in fact it looks almost exactly like this splined Octalink pic I found at the Park Tool site:
http://www.parktool.com/images_inc/repair_help/bb228.jpghttp://www.parktool.com/images_inc/repair_help/bb228.jpg

So is it possible that the engraving is wrong or am I missing something?

HillRider
08-18-07, 07:04 PM
When you removed the crank fixing bolt, how big were the threads on it? If they were 8 mm it's a square taper. If they are 15 mm, it's an Octalink.
pj7
08-18-07, 07:14 PM
14.91mm by my old calipers. I was already thinking it was octalink because of the 8 splines I see when I take off the crank bolt and look in there.
I wonder how this can be though, I can find nothing online about the FC-M440 crankset being octalink, everything I see claims that crankset to be square tapered, and I know I'm not reading the numbers incorrectly.

Soil_Sampler
08-18-07, 07:26 PM
http://techdocs.shimano.com/media/techdocs/content/cycle/EV/bikecomponents/FC/EV-FC-M440-1958B_v1_m56577569830612973.pdf

http://techdocs.shimano.com/media/techdocs/content/cycle/EV/bikecomponents/FC/EV-FC-M440-8-2112_v1_m56577569830612974.pdf
HillRider
08-19-07, 09:00 AM
http://techdocs.shimano.com/media/techdocs/content/cycle/EV/bikecomponents/FC/EV-FC-M440-1958B_v1_m56577569830612973.pdf

http://techdocs.shimano.com/media/techdocs/content/cycle/EV/bikecomponents/FC/EV-FC-M440-8-2112_v1_m56577569830612974.pdf

Based on these two documents, the FC M440 came in both square taper and Octalink bottom bracket types despite having the same model number. Surprising.
operator
08-19-07, 09:26 AM
Based on these two documents, the FC M440 came in both square taper and Octalink bottom bracket types despite having the same model number. Surprising.

This deserves a haha.
DieselDan
08-19-07, 11:32 AM
This deserves a haha.

More like a dee-dee-dee.