G3 recommends using the 4.1 diameter drill bit for all mounts. Otherwise while inserting or removing the stainless steel screws you can damage or even break them. The G3 OEM stainless steel screws are weak, in skis with metal top sheet or metal binding reinforcement plate you use a 9.5 mm long ski drilling bit, at 4.1 mm diameter. After drilling holes, we’d recommend a slight countersink of the screw hole in the ski to compensate for volcanoing. MOUNTING TIPS for do-it-yourself: The ION heel unit is unforgiving of mistakes in screw hole positions, and is likewise unforgiving of screw hole “volcano-ing” wherein the top of the screw hole bulges up as you insert the screw. (I’d make a graphic comparing the two screw patterns, but it would be misleading since they end up quite differently in terms of fore/aft, depending on boot size as well as optional adjustments in fore/aft binding position.)įor those of you concerned about how wide your binding mount pattern is, note that ION is significantly 10 mm wider at the toe, and insignificantly wider at the heel. That may sound like it’s still close, but ION appears to place the screw holes in significantly different positions in the forward/back direction once the boot is matched to its correct position on the ski - thus preventing overlap if you want to change binding models/brands or buy used skis with the ubiquitous tech binding screw holes. Major brand popular tech binding model is 30 mm wide x 40 long at toe, and 32 mm wide x 53 long at the heel. Our ION ski touring binding mount mount template. 25 mm per hole, easily within the variations caused by hand drilling. Don’t obsess, if for example a pair of holes is. Be aware, however, that manufacturing tolerances combined with slight variations in how the template is printed (paper even expands and contracts with humidity and heat) can result in slight variation. Earlier models may be 39.5 mm wide at the toe, this template is intended to match the latest bindings, easy to check by setting your binding on the template and seeing how the holes line up with marks on template. Moreover, the layout is wider than most tech binding screw patterns.Ģ015-2016 ION pattern is 40mm wide x 45 long (mm) mm at toe, and 36.5 wide x 52.5 long at the heel.
Word from G3 is they designed ION screw pattern (and mounting position on ski) to have the least overlap possible with existing tech binding mount patterns. G3 ION tech ski binding, based on the standard tech binding but with many small changes and definitely a different screw mounting pattern.
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