Minimum clearance angles be to prevent boot out?
I love this discussion!
I am trying to determine the minimum clearance angles need to prevent boot out. I agree with most of the posters here, that boot out is rarely, if ever a concern with normal race ski setups. However I am planning on mounting my bindings in a 4 to 8 degree outward angle abducted stance to compensate for severe duck feet. This setup will of course substantially increase the potential for boot out.
Garrett posted earlier measurements of 84 degrees inside clearance and 74 degrees outside boot out clearance with his ski setup. I am considering reducing the boot out clearance to 80 degree inside and 70 degrees outside.
What do you think? Is this too little angle clearance?
After determining the minimum boot out clearance angles I can live with, I will determine the maximum binding offset angles achievable with the given equipment. I am a masters racer and hope to come close to emulating Liggety's edge angles and want appropriate clearance.
I am planning to take the following steps to increase boot clearance angle with the angled bindings:
1. Use 3/8" aluminum plates front and rear on top of conventional plate to provide angled binding mount and additional rise height.
2. Relocation of lower boot buckles and possible plug boot sidewall grinding.
3. Mount bindings on 70 to 72 mm. wide waist cross skis.
4. Will use Tyrolia bindings with retracting brake.
On my skiing:
My severe duck feet prevent me from angulating the inside knee to the in a turn and results in an A-frame stance. This stance of course severely limits my ability to pressure and edge the inside ski. I will be skiing on the Fischer plug boot that I estimate will provide an initial 5 degrees abduction for each foot on top of which the angled binds will add. I have tried a posted footbed with a raised inside arch but that solution does not provide the added range of motion needed.
I am betting that my skiing improves with the abducted stance more than the slightly wider and softer ski slows me down. Of course this is very experimental and may not work at all in which case I will just go back to conventional race skis and binding setup.
I am stretching trying to get more range of motion with knee angulation to the outside, but several physical therapists have told me not to expect much improvement.
All opinions welcome.