Added these to my Kuryakyn hiway peg mounts on my '08 vtx 1800 F3. Gave me the extra leg extension that I needed. Going to add the 1.5 inch peg extensions to just kick the pegs out a little farther. Honestly, I think that Kuryakyn could have done a better job designing the highway peg mounts, they are good quality, but the pegs end up way too close to me, therefore causing me to add the 4 inch extensions. I am 6'1", but i think that the pegs would be too close even for shorter riders, fortunately, Kuryakyn has many ways to modify peg locations in a stylish way with very high quality products.