The most common frame part to need replacing is the rear derailleur hanger, sometimes known as the rear mech hanger. This is because not only is it often damaged in crashes, but it is also designed to bend easily to save damaging the derailleur or the frame. These derailleur hangers are usually specific to your bike and can depend on what rear derailleur you have equipped.
At Westbrook Cycles we have over 100 different types of mech hanger available from bike manufacturers such as Bergamont, Cannondale, Giant and Scott as well as aftermarket solutions from brands like Wolf Tooth Components.
If you have any questions about derailleur hangers or anything else, please get in touch with our friendly staff.