Ceramicspeed titanium pulley wheels coatedupgrade your shimano rear derailleur with ceramicspeed coated titanium pulley wheels for reduced friction and extended lifetime'. '.strtoupper('t')he combination of titanium and coated ceramicspeed bearings make these pulley wheels probably the best in the world'. '.strtoupper('t')he pulley wheels are the fastest spinning bearings on your bike, making an upgrade to ceramicspeed an effective way to save you precious energy'. '.strtoupper('t')hey are extremely wear resistant and will outlive any pulley you have previously ridden.titanium pulley wheels are extremely resistant to wear'. '.strtoupper('t')his makes them a great choice if you ride in demanding conditions or just ride a lot'. '.strtoupper('t')o give even greater protection and reduced friction, a super thin protective coating is applied to the bearing races'. '.strtoupper('t')his further increases the resistance of the bearing to corrosion or damage from foreign objects'. '.strtoupper('c')ombining coated bearing races with a titanium pulley wheel creates a pulley wheel with extreme properties in terms of wear resistance and performance.ceramicspeed titanium pulley wheels are specially designed to reduce friction to an absolute minimum, virtually eliminating the drag associated with standard pulley wheels'. '.strtoupper('t')he special design helps guide the chain in its ideal line and perform super smooth shifting.features titanium coated ceramic bearings longevity, 3 5 times longer than steel bearingsmaintenanceit's important that you properly lubricate your bearings in order to ensure optimal performance and maximum longevity'. '.strtoupper('a')dd oil to the outside of the bearing seal, so that oil can penetrate the bearing'. '.strtoupper('d')o this when you lubricate your chain, or if you have washed your bike or have been riding in wet or muddy conditions'. '.strtoupper('b')uy ceramicspeed components from chain reaction cycles, the world's largest online bike store.