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This replacement chain pusher/wing plate set is responsible for shifting the chain onto one of two cogs on 2- and 6-speed Bromptons.
The Brompton derailleur chain pusher wing plate set is a standard component on all 2- and 6-speed Bromptons. The wing plate rotates around a bushing, when the rider shifts, the plates contact the chain, pushing it on to either of the exterior cogs on a Brompton with a derailleur. This kit includes all the parts necessary to replace a worn out chain pusher/wing plate.