When it comes to handlebars, tried & true aluminum remains the material of choice for many pros. In part, that&8217;s because their bikes have to meet a minimum weight requirement, so there&8217;s little reason to use a sub-200g carbon fiber bar like the Zipp SL. But it also means that aluminum bars like the Service Course SL have to meet the fit, durability, & performance standards of athletes like US cyclocross champion Tim Johnson & the Cannondale Cyclocross Team prepared by Cyclocross World... .