Type Ⅳ Knuckles for S14,S15Type IV Knuckles Description The Type IV Knuckles offer the most extreme front tire angle in the entire Wisteria lineup. Designed for serious competitive drifting, these knuckles feature the sharpest Ackermann setting and the most aggressive geometry available, pushing vehicle dynamics to the limit while retaining Wisterias signature stability and rideability. Type IV is a step beyond the already powerful Type IIIdelivering even more angle, tighter