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Replacement chain for your Brompton.
Replacement chain for your Brompton. This chain is 102 total links. You'll want this length if your Brompton is a 2-speed with standard gearing (in other words, your Brompton has a 54 tooth front chainring and two sprockets in the rear: either a 16 tooth/12 tooth combo, a 16t/13t, or a 15t/13t).