The Small Center Trac Bearing is a concave bearing and is a professional grade yoyo bearing that is produced by the Central Bearing Company. The bearing is an upgrade from the traditional yoyo bearing because it's center has a slight groove, which helps keep your yo yo string from touching the response pads on either half of your yo yo. This bearing is meant to replace the F.A.S.T 201, Velocity Yoyo, and the Pocket Change Yoyo by Yoyo Factory.
If you are buying a yoyo, don't forget to buy a yo-yo trick book to carry with you, a yoyo trick DVD for at home, and extra yoyo strings. Learning new tricks makes yoyoing much more fun, and you'll need extra strings, because they wear out with regular use.
Bearing Size: 5 x 10 x 4mm