Fun 3 BarDescription The Fun 3 bar has been a staple offering in the Simworks by Nitto handlebar family for almost 10 years. Since discontinued in the Chromoly offering, Sim Works now have it available in 2 widths in their heat treated aluminum variety. The 31. 8mm bar clamp along with the material will provide stability and accurate steering input while keeping your hands comfortably positioned. Strength test, test again, then test again Fun 3 is an ATB bar