Originally Posted by
cyccommute
Are you sure about that? I've been unclipping inward since I started using clipless in the mid 90s and have never had a problem with it. I've used almost exclusively Shimano but I've also use some Wellgo and Xpedo as well as old Onzas. Never had a problem with it no matter which cleat (multi-release or single release) I used.
Bi-direction release
AND no tension adjustment. Narrows the field down considerably. It's been 4-5 years since I last looked (when I found the BeBops). As I remember, the only other one was Speedplay Frogs. There was a molded lump that prevented inward motion. File that off and you could rotate inward. Unfortunately that voided the warranty as I was told by a Speedplay person.
Incidently, my original motivation was this:
When I got back into riding I went to various shops when I was traveling for business. Early on, I was riding a mountain bike and decided put some real acceleration into it. One foot slipped off the pedal and as everyone knows, it whacks the back of your leg about halfway between your ankle and calf. The visible bruising took 3 to 4 weeks to go away. The lump underneath took maybe 6 months.