Derailleur chain tensioner idler or jockey wheels, DR (pair), a Brompton replacement part for use on 2 and 6 speed bikes.
Brompton Chain Tensioner Idler and Fittings - DR (Pair)
$40.00Price
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Derailleur chain tensioner idler or jockey wheels, DR (pair), a Brompton replacement part for use on 2 and 6 speed bikes.