The Optio spring set is a purpose-built replacement from 3Racing for TAMIYA TT-01 Type-E variants, referenced under TT01-14/LB/V2. These springs install into standard shock bodies and are intended to provide predictable changes in damping response and ride height without modifying shock hardware.
Service procedure follows common damper practice: remove the shock from the suspension, decompress the existing spring using the shock collar if fitted, swap in the Optio spring and reassemble. The design requires only standard RC maintenance tools and preserves original shock geometry.
For setup work, treat these springs as part of a system: adjust preload and select shock oil viscosity to complement the spring rate for consistent roll balance and weight transfer during competition runs. Perform iterative test runs and record settings to refine lap-to-lap consistency.