Recently I read abuot the Pinion P1 gear-box for the first time. It is a new bike gear system which is located in the bottom bracket (region). In contrast to the Schlumpf drives or similar products, we are not talking about 2 or 3 gears but 18 of them. The gears are 11.5% away from each other and the whole system covers more than 630%. The wheels are very light as they will only have to carry one pinion. Of course, this system is rather thought for upright bikes and a heavy system like this in a light noseboom would probably not be perfect. However it might be the perfect intermediate gear box and the best solution for a completely protected chain. I am looking forward to read more about this little device.