I saw a demonstration of the new World Bicycle Relief Buffalo bike 2 - and the gearing system has broken my brain.
The bike is designed for use in Africa - with the hope that transport will allow more people to stay in school and allow families to move from subsistence farming by allowing them access to markets.
This bikes a beast with a 100kg limited rack and built of steel heavy enough to be stick welded.
The gearing on the new version was designed by SRAM, has won EuroBike awards, but my head doesn't understand it. The bike has 2 chains to the freewheel, on 2 different sized chainring cogs. Backpedaling changes which chain is used. I've no idea how - but this bike is designed for field servicing in rural Africa so it can't be too difficult or it wouldn't be maintained.
How the new Buffalo gears work?
How the new Buffalo gears work?
A novice learning...
“the dreamers of the day are dangerous men, for they may act their dreams with open eyes, to make it possible.”
“the dreamers of the day are dangerous men, for they may act their dreams with open eyes, to make it possible.”
Re: How the new Buffalo gears work?
Thread up and running here. viewtopic.php?t=163793
Peugeot 531 pro, Dawes Discovery Tandem, Dawes Kingpin X2, Raleigh 20 stowaway X2, 1965 Moulton deluxe, Falcon K2 MTB dropped bar tourer, Rudge Bi frame folder, Longstaff trike conversion on a Giant XTC 840, Giant Bowery, Apollo transition. 
