Low-Friction Type Ball (Compatible with IF18-3/IF15-2) Introducing low-friction balls optimized for the lower rear shock of the IF18-3! Special surface treatment significantly reduces friction, enabling smooth suspension operation. The ball center height is set lower at 2.95mm (from 3.1mm) compared to the previous model (R0332), preventing interference with the wheel. Furthermore, it's also ideal when converting the IF15-2 rear upper rod to 5.8mm! The flange diameter at the base is reduced by 1mm to ensure clearance with the wheel. The inner side features a low-profile design that increases the slant angle, enhancing grip performance during acceleration.