At the beginning of the Plump Grips life the O rings will be rough but over time it will get softer, but apply the Brooks proofide to make them smoother and softer, it also helps nourish the leather by not allowing it to dry out and crack. Tighten the screws carefully and try not to over do it as this can snap them. For a great grip on the handlebar you would need to have the end side flushed and levelled to the end of the handlebar.
