Embodiments of the present invention include a tire having depth indicators arranged along an interior tire surface and methods of removing material from an interior tire surface. Particular embodiments of the present invention include a tire having a pair of beads spaced axially along a rotational axis of the tire; an inner exposed surface extending between each pair of beads and annularly about the rotational axis of the tire, the inner exposed surface being spaced from an exterior surface of the tire by a thickness of the tire, the inner surface including a depth indicator having a feature, where the feature of the depth indicator corresponds to an inward distance extending from the inner exposed surface into a thickness of elastomeric material, the elastomeric material extending between the inner exposed surface and a reinforcement embedded within the tire thickness. Particular embodiments include a bladder for forming the tire.