Derailleurs and mechs are sophisticated bike components to shift your chain from one gear to the next. Unless you are riding a singlespeed or hub geared bike, your road bike or mountain bike will need at least a rear derailleur to change gear and a front derailleur if you have more than one chainring.
Shimano and SRAM are the biggest names in derailleur components and reliable brands if you need to upgrade or replace your front or rear mech.
Finance available on all baskets above £280
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