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The knuckle allows for 45mm roll center and bump steer correction when used with the PSM Limit Break lower arm and up to 70 degrees of steering angle with PSM’s limit break supporting parts. The knuckles also lower the car 25mm without loosing travel with an upward offset axle location.
PSM also makes a high-trail knuckle that works with lower caster settings that give smoother, transitional handling and reduces front wheel layover at high steering angles that are induced and exaggerated by high caster angles. This can reduce mid-turn understeer under very high angle drifts. The high trail knuckle is also easier on the power steering system. This works because the self-steering forces are generated by the trail instead of caster and kingpin inclination, so the steering does not need to fight to lift the weight of the entire car as the wheel is turned.
Both knuckles work well but we prefer the traditional OEM trail location knuckles for our personal preference in setup. We prefer the self steer feeling, snappy transitions and high impact initiation of the OEM spindle for our power level on a short course. The fluidity offered in the trailing spindle is more appropriate for the higher power machines that steer with the rear of the car & get judged upon the ability to fill outer zones consistently.
