Designed with Nathan's preferred geometry, and now available in a 4pc design. Nathan himself alternates between riding 2pc and 4pc bars, and thus the Williams bars are available in both, no matter which your preference is. With a classic 4pc shape and design, these bars feature a custom end cap design for a cleaner look. The straight gauge chromoly tubing construction and TruTherm post weld construction ensure these bars are super strong and can withstand Nathan's insane level of riding. TruTherm Post Weld Heat Treated.