Spank Spike 30 Grips - 30mm Diameter BlueSpank Spike 30 Grips 30mm Diameter Blue. Spank Spike grips feature an interlocking column design offers the comfort and durability benefits of a finned grip without unwanted float. Asymmetric cushioning design provides firmness where its needed and added softness where comfort is requiredThree directional ribs at the front of each grip and flare at outboard end add traction in any condition Extra long body with single lock ring and smooth thumb zone