Racera Bearing Spinner Tool for 8mm Bearings - 7mm available too - see below.

Racera Bearing Spinners

The Racera Bearing Spinners enable you to check the condition and cleanliness of your bearings before and after cleaning them. They also allow you to accurately compare different bearings to ensure you choose the ones with the best roll, when you have several sets free. Simply put the bearing onto the spinner, hold it in your hand and spin it with your thumb from the same hand and time how long each bearing spins for. This is a professional tool that we use in our factory and here at Racera to test each and every bearing for consistency. They are a really handy thing to pop into your skate toolbox.

If you need a spinner for 7mm bearings, we can modify it so it will do 7mm bearings.  It can only do one size, so if you have both 7mm and 8mm bearings, you are best to buy two of them and choose one to suit 7mm bearings. There is no extra charge for the modification. Just choose the 8mm or 7mm button (8mm is default).