They are supplied with several different fittings, go straight on with just a bit of fiddling. Limited up-down adjustment range, you may have to loosen your bar grips and rotate the grips a smidgeon or two - depends how tall you are, I s'pose. Wiring is easy, just tap 'em into your existing front turn signal wires. No need for any load equaliser. VERY bright, VERY visible. Good stuff...............NOTE: convex mirrors! I soon got used to them, and you do get wider field of vision.