Review on Stylrtop Aluminum Bearing Derailleur Pulleys by Adam Huper

This is my second set since I bought another set for Gf bike when their tensioners started to fail. They've held up well enough for me to buy a kit for my bike as my life is ending. Of the two colors I received both are sharp and hold up well, the bearings are smooth and the pieces fit together perfectly. Would buy these again without hesitation. Not sure if I would use them on a high end bike but for our training bikes and eventually my mountain bike I will use them as there is no difference we can tell from original Shimano parts.