FREE shipping on this item! This is a great little piece that was actually made for SRAM Rival/Force front derailleurs to help get them to the correct angle. We have found that on some bikes the Front Derailleur braze on is simply just not in the right place to accomodate the Osymetric Rings. The is a nice little wedge that fits in between any brand of derailleur to pitch it either up or down slightly. If you are have trouble this could be the fix.