Winter Traction System
Ah, one of my favorite subjects!
I am not a real big fan of instep crampons. They are ridiculously tall and tippy, squirm about on your foot, don't give ANY traction during toe-off or heel plants when you need the traction the most, and are dangerous on rock to boot. In short, I think they suck and perform better as paperweights.
Although I have used screwed boots previously only during early and late season conditions that would not require the additional use of snowshoes or "real" crampons, I have now come up with a "Screwboot System" that is compatible with full crampons and snowshoes. ( It does require putting screws in your boots, so if that concept is simply too shocking for you, stop right here - BTW the screws are easily removed with no damage to the sole)
First, acquire some 1/2 inch motorcyle ice racing screws from Magicracing.com. These are FAR better than plain ol' sheetmetal screws - sharper, taller, and harder.
Attach your full crampon to your boot.
Install the screws as close as you can to the perimeter of the boot, without interfering with the crampon frame - (check to see that the crampon is still easy to put on and off) Install anywhere from 16 to 25 screws in each boot, making sure to have a few well placed on the toe and heel.
Snowshoe bindings would get quickly shredded by the sharp screws. To eliminate this problem, I add a piece of FIRM 3/8"- 1/2'" foam rubber installed atop the binding that has been cut from an outline of my boot placed on the foam ( I used a piece of the foam rubber tiles my wife bought to baby proof our slate floor - sleeping pad foam is too squishy)
Every binding is going to present a different challenge as far as mounting this - I simply used a short piece of stiff copper wire ran through holes in the foam and through a few slots in the snowshoe claw.
Try the snowshoes out with the foam spacer and the screwboots in the woods near you before heading out to make sure everything is compatible. One bonus of the foam pad is slightly warmer feet, "to boot".
The screwboots give great traction on low angle ice, and for safely navigating mixed LOW ANGLE ice and rock, and icy water crossings particularly at speed, they can't be beat. And you NEVER have to take them on or off. The traction on bare rock is also superb on everything BUT water polished rock. Walking on pavement is OK, but nothing I would want to do for miles. Once the slope angle exceeds 25-30 degrees or so, they will slip, and that would be time to change to real crampons.
Other minor caveats - the screws WILL shred your pants cuff if not protected from wandering foot placements - gaiters are recommended. Also, they probably wouldn't be welcome at Grey Knob or any of the huts - bring some hut slippers!
I would have added some pics of the system, but my wife made off with the digital camera - I will try to add some next week.
Here is a pic of the "original" screwboot ( Shown with std. sheetmetal screws before the racing screws were installed to accomodate full crampons)
Ye old screwboot