DISRAELI GEARS

AutoBike Classic

AutoBike (1st style) derailleur main image

The first AutoBike automatic transmission works like this:

  • The rear wheel had three weights mounted on it, which, as the bike accelerates, would move out radially against springs
  • By a system of cables, these weights moved a disc near the centre of the wheel outwards
  • This disc engaged with the small roller mounted on this Autobike derailleur, moving outwards, in turn
  • The derailleur, in its turn, moves the chain across the freewheel sprockets.

It's crude, it's nasty, it used a lot of fragile plastic parts - and it was soon renamed 'Classic' and effectively replaced by a more integrated design. Just to reinforce my point, this particular example has a broken roller.

But none of this addresses two fundamental problems:

  • Firstly, the gear a rider requires does not correlate that well with rear wheel speed
  • Secondly the sytem was not indexed - so it was more than possible for the speed of the bike to determine that your ideal chain position was exaclty in-between two sprockets.

Intriguingly crazy.


  • Derailleur brands: AutoBike, manufactured by Falcon
  • Country: USA, manufactured in Taiwan
  • Date of introduction: 1995?
  • Date of this example: unknown
  • Model no.: unknown
  • Weight: 293g including hanger plate, but with a broken roller and none of the terrifying mechanism that attached to the rear wheel.
  • Maximum cog: 28 teeth?
  • Total capacity: 28 teeth?
  • Pulley centre to centre: 56mm
  • Index compatibility: friction
  • Chain width: 3/32”
  • Logic: low normal
  • B pivot: sprung
  • P pivot: sprung
  • Materials: steel
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Browse associated documents.



US Patent # 4,701,152

US Patent # 4,701,152

US Patent 4,701,152 - AutoBike thumbnail




AutoBike Dealer Pack - 1995

AutoBike Dealer Pack - 1995

AutoBike Dealer Pack - 1995 scan 1 thumbnail
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