The topeak bar xtender is a perfect product for anyone that needs a little extra room for their gear when they39re riding it39s stays stable on the front of the handlebar perfect for any lights computers mp3 players or gps systems the bar xtender attaches securely to the handlebars or stem and can be easily adjusted for optimum positioning features clamp fits oslash22oslash38mm shims included crossbar fits oslash254mm above material engineering grad