Help you to find your perfect handlebar position: move them up and down, forward and backward, 2D.GT handlebar risers give you still unseen adjustability and stylingFor top yokes with 10.5 mm holesForward and backward adjustable in 3.6 mm stepsMaximum range forward and backward 25 mm (depends on height adjustment and bike tank)Adjustable up and down in 5 mm steps with spacers (maximum number of spacers is 5, depending on the bike)For 1-1/8” handlebars (spacers available separately for 7/8'' handlebars)