The Tekno RC 68mm Shock Springs are designed as an optional upgrade for the Tekno RC EB48 2.0, EB48 2.1, EB48 2.2, NB48 2.0, NB48 2.1, and NB48 2.2 platforms. They are offered in a wide range of spring rates, giving drivers the flexibility to fine-tune suspension behavior for different tracks, surfaces, and driving styles.