For experienced hobbyists and club-level racers, the Serpent 500021 Spyder SDX4 EVO refines a proven chassis with targeted improvements. The EVO focuses on serviceability and on-track adjustability without overcomplicating the setup.
The chassis is machined from 7075 T6 aluminium to provide a controlled mix of stiffness and compliance. Countersunk fasteners keep the bottom clean, and composite side-guards plus a centre spline help protect key sections while allowing easy alterations for different circuits.
Both ends use closed-type composite arms, and you can fit carbon inserts for added stiffness. Several shock leverage points allow drivers to alter roll behaviour, while the hard-coated aluminium suspension mounts help maintain geometry under load.
The drivetrain uses spring steel CVDs and driveshafts for strength. 2.5mm driveshaft pins increase retention reliability, and the two-pad slipper clutch delivers a broader adjustment window for tuning traction on various surfaces.
Battery and motor placement choices include shorty and saddle pack options so you can shift the centre of gravity to match track demands. A detailed setup sheet is supplied to speed up corner-weighting and shock tuning.
Overall, the Serpent Spyder SDX4 EVO balances durability and tunability for racers who want a straightforward platform to tweak and develop.
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