A unique gearing system offering a large increase in gear range. The unit is installed at the bottom bracket and front chain ring. It doubles the number of gear speeds and lowers the original range 250%. Beautifully made and very reliable. Used with favor around the world on all types of bikes. Manufactured in Switzerland by Florian Schlumpf and his company Schlumpf Innovations. A very useful accessory for Brompton hill climbing riders.
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Links to more information:
| Florian Schlumpf who invented the Mountain Drive gearing
product which he manufactures in a shop behind his alpine house in Switzerland.
He wears a constant smile as he hears of more happy Brompton bikers who enjoy
his Mountain Drive gearing system.
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Here you see Florian's UNICYCLE with a Mountain Drive Installed. He
had just ridden it to the top of a Mountain Pass. I must say the cows are impressed!
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This is Florian's workshop where he makes the Mountain Drives and Speed Drives |
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Florian's cozy home on a snowy day in his Swiss alpine town. The Mountain Drive workshop is in the back of his house |
