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Preferably Hollowtech but not open to suggestions of square taper.
Should I just go hollowtech King and take a crappy spare with me. They weigh next to nothing for the peace of mind.
tbh i would use square taper - even when it goes[develops play] it will last for a few thousand miles
I have had a hollowtech seize though it was not on a ride but two days later it would not move.
If hollowtech then probably hope and a spare and a spanner.
ive found the standard shimano ones do fine, I repack with proper grease...
rock n roll super web is my personal fave.
a spare if going way off the beaten track... an a tool... i use:
[url= http://www.jejamescycles.co.uk/icetoolz-crank-adaptor-tool-for-shimano-hollow-tech-ii-id71735.html?gclid=CPmioLHHpLYCFczHtAodpScA_w ]ice toolz HT2 tool[/url]