Review on GUB 31.8MM Carbon Fiber Handlebar Extender: Super Long 🚴 Bike Bicycle Mount Bracket for Light, Lamp, Computer, and Phone Holder by Jeff Kern

I use an extension on a round but tapered (31.5mm - 22.2mm) handlebar at its widest point near the center clamp. I cut some rubber strips from a used tube to get maximum grip and not scratch the handlebars. Swivel mount simplifies installation. The carbon shaft is tight and it only took a full turn of the bolt to get the slight resin compression sound. I stopped tightening it and was very careful not to overtighten the other screw. My lamps on the rubber mount are firmly fixed. This is the perfect extension for my Cruzbike Q 45.