Ask a Mechanic: Installing Headset Cups Ask a Mechanic: Installing Headset Cups Greg O'Keeffe2015-12-17T11:25:24-08:00 Joseph asks: “I need to install headset cups into my new mountain bike frame, Ask a Mechanic: Installing Headset CupsGreg O'Keeffe2015-12-17T11:25:24-08:00