Take your time when fitting bearings. A bearing that is pressed in crooked or forced against the shield can be damaged before the first session.
Before you start
Work on a clean, stable surface. Check that the bearings and wheel seats are free of grit, and lay out the spacers, washers and axle hardware included with your setup. If parts do not appear to fit, stop and check the product instructions rather than forcing them together.
Fit the bearings
Place a bearing squarely against the wheel seat. Use a suitable bearing press or the axle method recommended for your equipment, applying steady, even pressure so the bearing enters straight. Avoid striking the bearing or pressing on its shield. Fit any spacer between the two bearings if your setup uses a separate one, then install the second bearing squarely.
Check the wheel
Reassemble the wheel with the hardware in the correct order. Tighten the axle nut carefully and spin the wheel by hand. It should turn freely without excessive side-to-side movement. If it binds, check alignment, spacer fit and axle pressure before riding.
Some DSCO sets list built-in spacers, while others list separate spacers or different included parts. Confirm your set’s contents on its product page. For care after installation, see the DSCO care guide.