Not sure where to put this so I am putting in General.
I bought some Shimano M540 Petals for a new Cyclocross bike I got but I keep having trouble with them releasing when I pull on the hard side (going up a incline or accelerating). They feel like they are secure when I test them (e.g. try to pull them out while coasting, etc.). I am using the multi-directional cleat as I use the same shoes for riding and commuting.
I have a pair of A530 on my commuter bike and those feel very secure and I never have had a similar problem. I have the tension set about the same on both the M540 and A530 petals (by eye) so I thought they should have the same feel in terms of how secure they are. I thought my first pair of M540 were defective so I exchanged them, but the new pair are the same.
Should I just increase the tension significantly? I just don't think I should have to make the tension high on one pair, but not the other but maybe this is normal. Would the cleats wear in such a way that they fit the A530 better but won't work as well for other? Is it possible the larger base of the A530 would keep my foot from twisting in such a way to cause the M540 to release as it has no platform?