The Kyosho UB013 aluminium rear hub carrier is manufactured to match the Ultima RB7.5 chassis locations, providing a precise upgrade path from stock parts. Its machining ensures consistent fit and predictable behaviour.
Aluminium construction reduces the chances of cracking under stress compared with plastic alternatives, helping drivers keep a consistent rear profile lap after lap.
Made with the RB7.5 in mind, the UB013 slides into place using the standard fastenings. After installation, inspect for correct bearing preload and recheck wheel toe to preserve handling balance.
Aluminium strikes a practical balance of stiffness and lightness, so upgrading to the UB013 supports a tougher rear assembly while keeping the car lively on corner exit.
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