1Pair 17mm Steering Strut Knuckle Spindle Fit For 50cc 70cc 110cc ATV Go Kart Buggy UTV Bike Disc Brake Wheel Hub Parts This knuckle spindle set is designed for use with 50cc, 70cc, and 110cc off-road vehicles including ATVs, go karts, buggies, UTVs, and similar bikes equipped with disc brake wheel hub systems.The 17mm diameter strut is engineered to support steering and suspension functions, providing structural connection between the wheel hub and control arms.Constructed for in rugged terrain applications, it fits standard mounting configurations for compatible models.This package includes one pair of knuckle spindles for left and right side installation.This is a non-OEM replacement.Any mention of brand names is strictly for compatibility clarification.