Jesa Bont 688 Steel bearings

- This bearing has an exceptionally fine polished bearing track surface and incredibly precise balls.
- Light weight plastic cages for lower rolling resistance.
- The steel is extremely strong which helps the bearing keep its shape when under load.
- Jesa increased the radial clearance providing slightly less 'total contact ball patches', which reduces drag.
- Made in Switzerland.

* This product requires cylinder spaces, not the normal self centering spacers. 

* 688 bearing adapters fit over your 688 bearings so that they can fit into 608 wheels.