Renthal Fatbar Handlebar The championship proven Renthal Fatbar continues to set the industry standard in an unbraced tapered MX handlebar. The oversized (1-1/8in | 28.6mm) clamping diameter uses computer aided profiling tapering down to (7/8in | 22.2mm) to accept standard controls. Engineered from Renthal's exclusive 7010 T6 aluminum specially formulated to reduce vibration and provide superior strength. The above product photos are used for illustration purposes only and may vary slightly.