Core RC have released new progressive big bore springs for 1/10th Off Road. These high quality precision made springs allow the car to float over bumps but not roll too much during cornering. The consistent wire diameter means that the characteristics of each spring in the line-up is similar, giving a consistent performance across the range. The spring stiffness increment between springs is very small, allowing fine adjustment of the suspension. Also to enable the big bore springs to be used on small bore shocks they have released 2 optional converters for the top of the spring, enabling better seating of the spring. The bottom of the spring fits regular small bore shock bottoms.