Bont 688 Mini Inline Skate Bearings
The Bont 688 mini inline speed skating bearing has an exceptionally fine polished bearing track surface and incredibly precise balls.
The lightweight plastic cages allow for lower rolling resistance. The extremely strong steel helps the skate bearing keep its shape when under load.
Bont 688 bearing adapters fit over your 688 mini bearings so that they can fit into 608 inline wheels.
These bearing adapters allow you to use a mini bearing in a wheel that was made for a larger 608 bearing.
The benefit of using a mini bearing and an adapter rather than a 608 bearing is that you can create a much lighter setup with better acceleration.
This product requires cylinder spaces, not the usual self-centering spacers.