The ShimanoFront Freewheel (FFS) was a proprietary bicycle drivetrain design of the 1970s that placed a freewheel between the pedal cranks and the front chainrings — enabling the rider to shift gears while coasting.[1] FFS rear freewheel is different than a standard freewheel because it's "stiff" with more friction than a normal rear freewheel. It will slip if necessary however, to stop the chain in the event of, for example, a clothing tangle — which could otherwise lead to injuries of the leg by the drivetrain, crashing of the bicycle, or both.
Integer FF crankset on Schwinn Suburban
Detail showing logo
FFS marketing followed Shimano's then-current path of beginning with lower-cost implementations of the system using low tech and usually heavier materials. The resulting system was substantially heavier than the standard freewheel and, in any event, did not penetrate the market noticeably, although Panasonic, Ross, Schwinn, and Raleigh briefly equipped bicycles with FFS. The late Sheldon Brown called FFS a "solution in search of a problem."[2]
Non-proprietary front freewheels can currently be found on bikes used for bike trials riding, such as the Honda RN-01 G-cross. Such a system allows for the use of cheaper fixed-gear rear hubs instead of cassette hubs, lower gear ratios, and increased ground clearance at the bottom bracket.[3]
front, freewheel, shimano, front, freewheel, proprietary, bicycle, drivetrain, design, 1970s, that, placed, freewheel, between, pedal, cranks, front, chainrings, enabling, rider, shift, gears, while, coasting, rear, freewheel, different, than, standard, freewh. The Shimano Front Freewheel FFS was a proprietary bicycle drivetrain design of the 1970s that placed a freewheel between the pedal cranks and the front chainrings enabling the rider to shift gears while coasting 1 FFS rear freewheel is different than a standard freewheel because it s stiff with more friction than a normal rear freewheel It will slip if necessary however to stop the chain in the event of for example a clothing tangle which could otherwise lead to injuries of the leg by the drivetrain crashing of the bicycle or both Integer FF crankset on Schwinn Suburban Detail showing logo FFS marketing followed Shimano s then current path of beginning with lower cost implementations of the system using low tech and usually heavier materials The resulting system was substantially heavier than the standard freewheel and in any event did not penetrate the market noticeably although Panasonic Ross Schwinn and Raleigh briefly equipped bicycles with FFS The late Sheldon Brown called FFS a solution in search of a problem 2 Non proprietary front freewheels can currently be found on bikes used for bike trials riding such as the Honda RN 01 G cross Such a system allows for the use of cheaper fixed gear rear hubs instead of cassette hubs lower gear ratios and increased ground clearance at the bottom bracket 3 References Edit Shimano 1982 Catalog FF System Retrieved 2012 10 16 Sheldon Brown Shimano Trials Tech www biketrials com Retrieved 2015 10 08 Retrieved from https en wikipedia org w index php title Front freewheel amp oldid 875199228, wikipedia, wiki, book, books, library,
