Root Industries Oversized T Bars are a 4130 chromoly steel scooter bar with an oversized inner and outer diameter, as well as a slit, making them compatible with HIC compression ONLY. They are NOT compatible with any other type of compression unless you cut the bars down to remove the slit, making them compatible with an oversized SCS. Oversized T Bars require an oversized clamp. Steel bars are not as light as aluminum scooter bars but HIC compression is one of the most effective compression systems on the market today.