Design and innovation are in the Italian soul. Funny thing, their favorite ski touring binding was invented by an Austrian. Solution to that nationalistic dilemma? Mod the heck out of it.
To that end, Italian metal manufacturing expert Stefano Maruelli is getting crazy with Dynafit mods. He’s published a print catalog chockablock with everything from his silly appearing (yet effective) Natural Walking Plate, all the way to a fascinating variations on the basic tech binding. This plethora of after-market “arte italiana” includes a snowboard toe unit as well as a variety of race rigs. For now, let’s just concentrate on this cool little jingus he’s cooked up (yum, taste that aluminum!) for the Dynafit Speed binding model: The Maruelli Antitwist for Dynafit Speed ski binding (we’re not using trademark or copyright symbols here, but please know that in no way is Maruelli associated with Dynafit, he’s simply making aftermarket add-ons).
Question will be how easy is it to retrofit the Maruelli system on a ski that’s already been drilled for OEM Dynafit Speed? No easy answer, but one way or another it is certainly possible. The longer rails easily allow a mount without overlapping original holes. If you use the shorter rails, you can fit perfectly to original jig-drilled holes of previously mounted Dynafit Speed Radical. If mounting without the rails (lightest configuration, and lower ramp angle), you can probably find a spot without overlap, again depending on where the original mount was located.
Metrics, all for single binding:
OEM Dynafit Speed base/spindle, no mounting screws, 1.9 oz, 54 gr. (This is the part you swap out for all options below.)
Maruelli Antitwist base with no adjustment track, 1.3 oz, 36 grams, allows 6 mm of fore/aft boot length adjustment. (Our favorite configuration — saves 18 grams per binding and also drops your heel 3.3 mm to better ramp angle. Can probably be mounted between existing standard holes.)
Maruelli Antitwist base, short rails version, uses Dynafit Speed Radical mount pattern, 3.5 mm additional heel rise over OEM, 22 mm of fore/aft boot length adjustment: 2.5 oz, 70 gr. (16 gr. penalty over OEM)
Maruelli Antitwist base, long adjustable version is similar to demo bindings and matches screw hole pattern for Dynafit rental binding, 3.5 mm more heel rise than OEM, 58! mm of fore/aft boot adjustment: 2.9 oz, 84 gr.
More info about boot length adjustment ranges for Dynafit bindings.
As of fall 2014 Maruelli aftermarket parts are available here.
Also, check out Dynafit’s twist blocker for Speed Radical.
WildSnow.com publisher emeritus and founder Lou (Louis Dawson) has a 50+ years career in climbing, backcountry skiing and ski mountaineering. He was the first person in history to ski down all 54 Colorado 14,000-foot peaks, has authored numerous books about about backcountry skiing, and has skied from the summit of Denali in Alaska, North America’s highest mountain.