Originally Posted by
Butterthebean
I'm sorry to hear that Power Grips give you knee pain. I will agree that there is nothing as efficient as clipless, buy my Power Grips are not too far behind. I must set mine up a little tighter than you do because I can pedal in circles. Pulling back is no problem, my feet don't slip at all unless I turn my heels out, then my foot will come out of the pedal. This is how it should be and I've never had unexpected foot slippage.
If your feet slip out when you pull straight back, the Power Grips may not be quite snug enough.
I wear size 15 wide shoes so I use the XL Power Grips, but I have them on the tightest setting for my usual riding. If I have to wear some heavy winter boots, I open them up a few notches.
It's not the Power Grips that cause the pain, it is the mashing. I have them as tight as I can get them and still be able to get my foot on the pedal. The slippage is not a lot. It isn't like my foot comes completely off the pedals. I have never measured it, but if I had to guess, my foot would slip 1/4 to 1/2 of an inch. Just enough where I would need to reposition my foot. It could be the pedals also. If I got some quills with a good grip, there probably wouldn't be as much slippage. But then I still wouldn't ride it far in soft sole shoes.
I do like Power Grips, I have them on one of my bikes and I don't see a reason to change them. But that bike is for shorter trips where I can mash and not cause pain.