I've heard that SPDs (the MTB ones) are easy to clip out because of the multi-release.
If people insist on using SPDs wrong then they'll not work.. first: don't use cleats with M-marking (M for multirelease), second: tighten down the tension screw at least a full turn, and third: make sure you have adjusted the angle of the cleat on your shoe so that you don't get to "clip out angle" without wanting to..
I have had 3 unclips i didn't want on my SPDs since starting using them, first was due to a wrongly adjusted cleat + too loose tension on the pedal (at least that's what i suspect), second was because a small stone stuck on the shoe by the cleat had blocked the cleat from being securely locked in, third i don't know, but i changed the pretty worn cleats and have not had problems since..
Skid all the time, run brakeless, and 48x17 gear, about 75 GI.
If people insist on using SPDs wrong then they'll not work.. first: don't use cleats with M-marking (M for multirelease), second: tighten down the tension screw at least a full turn, and third: make sure you have adjusted the angle of the cleat on your shoe so that you don't get to "clip out angle" without wanting to..
I have had 3 unclips i didn't want on my SPDs since starting using them, first was due to a wrongly adjusted cleat + too loose tension on the pedal (at least that's what i suspect), second was because a small stone stuck on the shoe by the cleat had blocked the cleat from being securely locked in, third i don't know, but i changed the pretty worn cleats and have not had problems since..
Skid all the time, run brakeless, and 48x17 gear, about 75 GI.