1-1/4" O.D. steel handlebars provide a massive look To keep the switch wires out of sight the bars have been dimpled and slotted under the switch housing area so the wires can be run internally The brake side has been clearanced to be used with OE style master cylinders and most custom brake master cylinders Risers are threaded 1/2"-13 and mount on 3-1/2" centers Fits models with 3-1/2" riser spacing