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ramp angle data - Page 2

post #31 of 34
Generally the forward lean is in reference to angle of the boot cuff or lower leg really and is not altered by altering the foot ramp angle. Increasing the ramp angle MAY reduce forward lean because in the case of a large calf the extra height at the heel can lift the muscle out and allow the leg to come out of the boot staighter.

I think both of you mentioned the increased ramp angle can open the ankle joint which may allow more effective use of ankle flexion (especially when it's limited) which permits the skier to stay balanced during flexion. Otherwise as flexion occurs and the dorsi flexion bottoms out everything goes back and out of balance.
post #32 of 34
It's simpler than that.

Draw two lines (one horizontal, one not-quite-vertical) forming an acute angle. Label the point at the corner of the angle "B," label the other end of the horizontal line A, label the other end of the almost-vertical line C.

Now draw a new point B' a little way directly above point B, and draw A-B'-C.

A is your toe. B is your heel. C is the top of the cuff of the boot. When you stick a shim under your heel inside the boot, you don't change the position of A or C, you just change the position of B.

Yes, it's not that mathematically precise in the real world. There are some other things at work (like your calf coming slightly out of the boot), but they just make the result "more so."

As I've said in every other post, there are all sorts of reasons to fool with ramp angle and forward lean (angle of ankle), and one relative to the other, etc., but none of that has much to do with trying to compensate for the built-in ramp in one set of bindings v. another.
post #33 of 34
SSJ, I am not hung up on it . I want to know what the "official" defintion of forward lean is in the ski industry. I read your other post with the acute triangle. My idea is that the line from B to A represents the ski, not the boot sole. As L7 says, if you raise the heel within this triangle, the A-B-C angle of front of boot in relationship to ski doesn't change. If you shim the heelpiece the angle changes because B-A is the ski, not the bootsole... Oh hell, I'm confusing myself. Ramp is different from Delta. That is all we know and all we need to know.... Happy skiing, one and all. LewBob
post #34 of 34

Long femur/small foot lady skier.

And the wisdom above with regard to binding ramp certainly applies, thanks guys.

As far as I understand the discussion (and SJJ's triangle) so far, overall binding lift should play a superbly minimal role or none at all (as opposed to ramp)?
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