This Linear Ultra Shock Spring 3.0 is an RC-scale suspension spring intended for use in shock assemblies where a linear-rate response is required. Its name denotes the 3.0 designation used by the manufacturer to identify the spring version, and it is designed for hobby applications such as touring and pan car setups where consistent spring behavior matters.
Use this spring when you want predictable compression and rebound characteristics without progressive ramp-up. In practice that means it helps you evaluate other suspension changes—damper oil, piston size, preload—by keeping the spring rate consistent throughout travel.
Installation is standard for shock springs: remove the shock cap and shaft assembly, slide off the old spring, and fit the new spring onto the shock shaft and spring retainer. Verify that spring seats and retainers are clean, and check preload and end-to-end symmetry between left and right shocks after fitting.
Tuning notes: replacing springs is one of the primary ways to change chassis balance and roll behavior. A stiffer linear spring increases resistance through the stroke, reducing body roll and increasing mid-corner support, while a softer linear spring improves compliance and traction on low-grip surfaces. Combine spring swaps with incremental preload adjustments to dial in ride height and initial response without altering damper valving immediately.
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