There's a lot of 100mm brakes and then the 130's but I don't think there is too much in between. Probably some 105mm but I hear of 100mm and 130mm brakes a lot more than say a 115 mm brake.
Choose Ski Binding Color and Brake Width The R stands for brake width. The STH takes a different brake than that of the Z bindings, but the regular brake can be modified to fit. R80 =
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