Originally Posted by
corrado33
Just for your information, the reason these bolts are hard to remove is because they're also removing the cranks at the same time. It's quite hard to turn tool to remove square taper cranks, so I'd say if you're rounding off the bolt then remove the ring. Good luck, working with a pin spanner sucks.
Whups- I agree. I got ahead of myself.
If you can unscrew the bolt one or two turns then it gets tight again, it's doing what it's designed to do: remove the crankarm. I still say that 6mm is too small a hex to correctly torque the crankarm, either tightening or loosening. Conventional 14mm bolts work much better, but you need the "normal" crankarm removal tool to take them off afterward.