For racers and weekend drivers wanting more tunability, the RACEOPT Progressive Dynamic Springs bring a T2.5 to T3 progressive rate that adapts under load. They are aimed at improving chassis balance across a variety of surfaces.
The red and black springs firm up as they compress, helping to prevent harsh bottoming and giving extra support during heavy landings or fast cornering. That progressive change in rate helps keep the car predictable at speed.
These springs are suitable for many standard RC shock configurations and install with basic tools. They make a practical upgrade for drivers who want more control without a major rebuild.
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