If you run rough trails or hard-packed circuits, the Kyosho UM580 Rear Shock Stay gives the Ultima SB a stronger rear mounting area. It helps your shocks hold alignment through impacts and supports consistent handling under load.
The Kyosho UM580 improves the rigidity where the shocks attach, lending more stable rear behaviour during corner exits and over jumps. That stability makes tuning for balance and traction easier session to session.
Made to cope with frequent off-road use, the Kyosho UM580 enhances the chassis resilience and keeps rear suspension geometry more predictable, helping drivers stay in control across varied terrain.
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