A new bearing may feel different after installation as the lubricant spreads and the parts settle into use. There is no need to force a long or aggressive break-in period based on the information on this site.
Do a setup check
Before riding, spin each wheel by hand and check for binding, unusual grinding or excessive side-to-side movement. Confirm the bearings sit squarely, the hardware is in the correct order and the axle nuts are secure without preventing the wheels from turning freely.
Start gently
Use a short, low-risk ride to check that the setup behaves normally. Pay attention to a wheel that sticks, makes a new grinding sound or feels rough under normal use. Stop and inspect it rather than trying to ride through a problem.
If something feels wrong
Check installation, wheel contact and axle adjustment first. If the bearing remains rough, damaged or corroded, do not rely on a break-in period to fix it. Follow the product’s instructions or replace a faulty part.
For step-by-step fitting help, read how to install skateboard bearings.