This format should be easier to read, and hopefully not get screwed up when viewing on mobile.
"Stated size": Tip width when passing topsheet > Tip width fully-deployed (Bare brake tip width, not in binding)
"90mm": 91 > 110 (135)
"100mm": 102 > 122 (152)
"110mm": 110 > 130 (157)
"120mm": 130 > 147 (170)
As you can see, the stated widths are actually pretty accurate, except for the "120mm" size, which should really be called 130mm (as of the 2017 and 2018 seasons anyway, maybe they changed it for 2019). The "Tip width when passing topsheet" is the critical dimension, since you don't want the tips to get stuck on the topsheet instead of deploying after binding release.
Any of the brake arms can fit skis about 8mm wider than the "Tips at Topsheet" measurement if you grind off the inner points of the plastic brake arm ends at an angle. With the brakes mounted, move the brakes from stowed-to-deployed to see where they need to be ground to clear the topsheets. (If you do a heavier grind, you could go an additional 10mm or so.) So with a mild inner tip grind, "90" brakes could probably fit 99mm width ski, "100" brakes could fit a 110mm ski, "110" brakes could fit a 118mm ski, and "120" brakes could fit a 138mm ski. This is without even bending the brake arms.
Bookmarks