Grab the new bearings with a pair of tweezers and place them in a ring around the hub opening. Press down so they stick to the grease. Replace each bearing that you removed on each spacebar clicker side.You can buy new bearings at any bike shop or online. On most bikes, the rear wheel uses 1/4" bearings and the front wheel uses 3/16". If you aren't sure what type your bike uses, check the user...