04/15/2020
Weather-sealed bike transmissions that are currently on the market are the Rohloff (internal hub), Shimano (internal hub) and Pinion (internal gearbox). Though they meet the main goal of keeping the transmission clean they weigh more, cost more or required a custom frame (or all three). If another option were available at the same price and weight as a derailleur, that could fit on a commonly-available frame, would you be interested. Take a look at the Speedcase from Pedalmotive.