The Kyosho UM573 Main Chassis is a vital upgrade option for Ultima SB owners in the Legendary Series. It offers a robust base that reduces flex and helps the car remain composed under load, suited to both weekend track use and regular club racing.
Manufactured with attention to durability, the Kyosho UM573 Main Chassis resists the typical wear that comes from repeated running. Its design emphasises stability and consistent feedback so you can fine tune handling with confidence.
Specifically matched to the Ultima SB, this main chassis installs without compromise and supports common upgrade paths. Use the UM573 when you need a reliable replacement or when dialling in a more race-oriented setup.
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