Brompton Derailleur chain pusher assembly

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Replacement Brompton derailleur chain pusher assembly. Brompton chain pusher The Brompton derailleur mechanism which pushes the chain tensioner wheels between the two rear sprockets on a two or six speed Brompton - it works in conjunction with the DR style chain tensioner The chain tensioner has not changed from the pre-2017 to the 2017 onwards integrated shifter derailleur