Spec-R 20mm touring car shock springs
Spec-R have six new 20mm “big bore” spring for 1/10th touring cars available. Coming in fine steps from a soft 0.271kgf/mm to a hard 0.318kgf/mm the springs are meant to fit a wide range of today’s short TC shocks that make use of low-profile 20mm springs. Made from high-quality spring steel and sporting laser-etched markings for easy identification the springs are available separately or as a a complete set with all six pairs from soft to hard.
Source: Spec-R [spec-r.com]