TKR9184W – Suspension Arms (wide pivot, rear, EB/NB48 2.1+)TKR9184W Suspension Arms (wide pivot, rear, EB NB48 2. 1+) TKR9184W Suspension Arms (wide pivot, rear, EB NB48 2. 1+) are designed and required for use with our wide pivot C D blocks, delivering increased rear support and stability on medium to high grip tracks. The wide pivot setup enhances precision during quick direction changes and improves throttle control, giving your buggy a more planted and responsive feel.