The allure of going faster with less energy is appealing to almost anyone and the latest innovation to make bikes go faster is ceramic wheel bearings. Since the speed of a motorcycle is most determined by the performance of its rotating parts, investing in ceramic wheel bearings by Worldwide Bearings is a logical choice for the serious rider. These bearings are a perfect complement to a set of carbon fiber wheels or as an OEM replacement. Look for them in the winner's circle. Worldwide Bearings Ducati Ceramic Hybrid Front Wheel Bearing Kit Worldwide Hybrid Ceramic Bearings utilize SAE 52100 high-carbon chromium steel races, this air-melted alloy is clean, hard, and wear resistant, combined with Grade 5 Silicon Nitride balls. All ceramic bearings come with low friction removable seals. Set includes 2 Front Bearings Quicker elapsed times and higher MPH's Ceramic bearings offer 40% less friction than steel Less friction = More horsepower 60% less rotating weight Low tension, maintenance free dust seals Mobil Polyrex light weight aerospace grease Bearing life 3 to 5 times longer than steel Lower vibration levels Cooler running No extra maintenance required 2 year warranty 100% hand assembled in the USA to exacting specifications Replaces Ducati Part Numbers 70250451A / 751622566 / 70250621A. For wheels with 25mm Front Axles. Check Part Numbers to confirm fitment. Fits stock OEM Wheels for model specified only.