Some brake arm measurements taken on a Tecton heel, measured from the inside of the tips of the plastic ends. Might help folks figure out what they actually have, and what ski width the brake will fit.
---------- Unmounted Arm -------- Tips at ---------- Tips Fully
---------------- (tip to tip) ------------Topsheet -------- Deployed
90 ------------- 135 ------------------- 91 ------------------ 110
100 ------------ 152 ----------------- 102 ----------------- 122
110 ------------- 157 ----------------- 108 ----------------- 130
120 ------------ 170 ----------------- 130 ----------------- 147
Some details:
- There seems to have been some brakes labeled "115mm" in 2017 that were actually 110mm brake arms.
- 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 a bit. (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 moderate inner tip grind, "90" brakes could probably fit 101mm width ski, "100" brakes could fit a 112mm ski, "110" brakes could fit a 118mm ski, and "130" brakes could fit a 140mm ski. This is without even bending the brake arms.
- Interestingly, the "115" (110) and 120 brake arms are the same from the middle to the first bend, and a more shallow bend angle (followed by a tighter outer bend) is what makes the 120 wider. Adjusting the ~45 degree bend angles in a vise should be a lot easier than modifying alpine brakes with 90 degree bends, since you can play with minor changes to the two existing bends instead of completely relocating full 90 degree bends.