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Do I need a Gas pedal?

post #1 of 5
Thread Starter 
I'm replacing my Tecnica XT24 plug boots with a pair of Diablo Race Pro 130's. These will be used on hard-snow carving days.

I've read multiple sources that observe that the Diablo Race Pro has excessive forward lean.

If I understand correctly, a plate can be installed under the toe of the boot and the lug is machined to meet DIN specs.

What are the pros 'n cons of this?

post #2 of 5
1) increase response to turn initiation
2) change fore/aft bias
3) standing taller
4) quad muscle firing response
5) increased "stacking" effect
6) perceived balance differential

1) Change fore/aft bias
2) perceived balance differential
3) decrease response to turn "end phase"
post #3 of 5
Thread Starter 
Thanks for the reply, I'll add some info about my skiing & gear.

I tend to ski with weight forward while producing short turns on steeper slopes but like a more relaxed and upright stance while making easier GS like turns. I’ll describe what I feel is happening when I ski;

I’m looking at the slope ahead and planning my line. I’m trusting my gear to carve rail-road tracks and I’m planning a line that keeps speed in control by making full “C” turns. On steeper runs I’m often skiing shoulder to shoulder to perform a “C” shaped turn every 25 yards or so.

If the run is groomed, I’m skiing at Gold level Nastar speeds. I’m staying on the balls of my feet and against the tongue to pressure the tips at the start of the turn. My weight is equal on both skis at the beginning of the turn. I imagine an arc when starting a turn. I will roll my knees into the arc and the skis will roll on edge and reverse camber. Once an arc is established, I move my weight between the balls of my feet and my heel. I’m still forward on the tongue of the boot and never am on the spoiler if conditions are firm and smooth. I move 75% of the lateral forces to the outside ski which tightens the arc. I can usually reach down and touch the ground at this point. I try to use the rebound of the ski to bring the ski under me at the end of the turn. I often make a short traverse before starting the next turn, but things are happening quickly due to the speed.

If moguls are present I use the bumps to time my transitions. I will carve a turn in-between the moguls and change edges on the back side of a mogul.

I now use two boots: I use a 2005 Salomon Course that works well out of the box once the canting was adjusted. I am slightly knock kneed. I usually need 1.5 to 2 degrees on the right side and 0.5 degrees on the left. The forward lean and stance is on the Course comfortable & responsive.

The Tecnica XT 24 fit even better out of the box. I expected sole grinding would be required, but two evaluations suggested that a dense pad between the shell and the cuff on the outside of the right boot was all that was required. The XT 24 is stiffer and has more feel than the Course, but my posture is about the same IMO.

I do notice that some Look bindings produce too much ramp for comfortable all day skiing. I prefer the minimum ramp of Tyrolia bindings more.

Hope that helps.

post #4 of 5
I agree Cantman's response to what the pros and cons of messing around with "gas pedaling" are. Was this your question or did you mean pros and cons to making the change by raising the toe and countering the toe lug to fit into your boot?

The easiest way to figure out whether you need change in your positioning either with ramp angle change internally or externally is to test it.

External lift is the easiest to do. Take a 3mm shim ( I use 3mm bontex shims).

Pick your favorite terrain take 3 runs with the same line and varied turn shapes. 1 run with the shim between the boot toe and binding AFD. 1 run with the shim between the boot heel and the binding heel piece. 1 run with the shim removed.

Repeat this test 2 more times on different terrain or snow. I would also check out the differences on your GS versus SL skis. At some point in the process something will feel better and something will feel worse. There are 4 possibilities:

1. You will like the toe externally raised
2. You will like the heel externally raised
3. You will like the boot just as it is
4. You will be so confused that you will have to quit skiing for the season

Before you do this, I would recommend that you find your bootboard ramp angle first. You can test this in the same way.

You can do this same test with internal ramp angle by raising the heel 3mm, or raising the toe 3mm. Perform the test the same way. A little harder to do because you have to stop take off the boot, insert or remove toe or heel lift, etc.

In terms of order, I would always figure out your internal ramp angle first, and then figure out your external changes. Be consistent with binding ramp angle as this will have effect on the outcome.

You have read sources that describe the Diablo Race Pro as having excessive forward lean. IMO Excessive is a relative term for boot forward lean. Relative only to the individual that is inside the boot, not the dimensions that you read on the company brochure. The Diablo Race Pro is not the least in forward lean, and is not the most in forward lean. For some skiers it will feel like too much forward lean, for other skiers it is just right, and for others it will not be enough. The Diablo Race Pro also has a bootboard that has a little lower ramp angle then other boots in that class. This adds to the feeling that this boot forces you forward. By changing the internal heel height or internal toe height for that matter, you can alter the feel of the forward lean on any skier.

One other point is lumping all bindings of a brand as being the same ramp angle. All models of the same brand are not the same ramp angle, as well as model years within a brand can be different. ("running changes", this is when a manufacturer makes subtle changes in production and runs away without telling anyone) Also there are manufacturers that have made adaptations to some ski models and plates that change the ramp angle of some models of bindings.

Maybe more info than you wanted? So here's the simple answer:

Gas pedaling - could work as a way of straightening up the lean of your boot.

Gas pedaling with an external Boot Lifter - the preferred method of implementing the gas pedal effect - allows you to step into any ski with the same feeling.

post #5 of 5
Thread Starter 
Thanks Jim, that's a very complete answer. Also thanks to Billy. The info available at Epic is remarkably solid.

My question was prompted by the comments I've seen on the Diablo Pro.

I need to get on the boot and see how I feel about the new gear before deciding about any changes.

Based on your & Billy's comments and other info I have received, I now a basis for evaluation.

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