Phil Lee, Squid wrote:
http://weightweenies.starbike.com/ph...ic.php?t=19036

Aluminum BB axles are not a good material selection...

they're fine if they're dimensionally appropriate for the job. aluminum
shimano axles anyone?

the problem comes when you use the same size in aluminum as you do in
steel given aluminum's much lower strength. presence of scandium in
this situation is pretty much irrelevant.