The parts of the handlebar you hold should always be covered because bare metal or carbon fiber can be slippery. For a drop-type handlebar, use handlebar tape. For a flat or mountain-type handlebar, use approved grips.
Grips use a variety of methods to secure them on the handlebar. With any attachment, the grips should be firmly attached so that they do not move with normal riding. If the grips slip on the handlebar, you could lose control and fall.
If you are unsure of the safety of your grips, do not ride the bicycle; take the bicycle to your dealer for adjustments.
Once a month test the security of the grips by attempting to rotate them in the handlebar. The grips should not move.
Some grips have a textured surface to provide a better grip. If the texture of your grips is worn out, replace the grips. If your bicycle has handlebar tape that is loose or worn, replace the tape.
Most grips are round or cylinder-shaped, so do not require adjustment.
Do not apply lubrication to the grips.