Has anyone cut them open or had the misfortune to see the cross section unintentionally?

I’m looking at dabbling with super short cranks and as I have SLX cranks already, they look ideal to drill and tap further down the arm. From rough measurements this would give about a 150mm length. I would consider getting steel inserts too as I’ve noticed some models of SLX have them.

Someone beat you to it

Not so much but exactly the info I needed. Cheers.

Zee’s aren’t hollow if you’re after something to modify.

Good call DD

Zee are also heavy, Deore is lighter and is not hollow.

Not sure there will be enough thickness left on a Deore to shorten to 150mm. Depends on the application I guess.

I’ve got some old XT like the ones in the link it they will do. Just have shimano written on them as they are of a specialized.

http://www.ebay.com.au/itm/PROMAX-ST-CRANK-ARM-SET-RED-150MM-PX-CK13ST150-RD-/231245404310?_trksid=p2054897.l4275
150mm cranks (5 bolt and probably road…)
and some discussion on short cranks
http://forums.mtbr.com/drivetrain-shifters-derailleurs-cranks/150mm-crank-arms-681400.html

http://bikesmithdesign.com/Short_Cranks/hollow.html

Think I’ll ditch the idea for shimano cranks!