Shock Spring Sprindex Downhill 490-560 lbs

Sprindex Adjustable Downhill Coil Spring (490–560 lbs / 75mm Stroke)
Upgrade your rear suspension with tool-free, micro-adjustable coil spring performance. Featuring a 490–560 lb/in rate range, 75 mm stroke, and progressive end-stroke support, this lightweight high-tensile steel spring allows you to fine-tune your sag and ride feel without changing preload. Includes 5 low-friction Delrin adapters for broad shock compatibility.

Sprindex Adjustable Downhill Coil Spring (490–560 lbs / 75mm Stroke)

Achieve the ultimate rear suspension setup without the hassle of swapping traditional coils. The Sprindex Downhill Coil Spring brings tool-free, micro-adjustable spring rate tuning to your coil shock, allowing you to fine-tune your sag, adapt to changing trail conditions, or stiffen your rate for long climbs. Engineered from super high-tensile spring steel and lightweight glass-reinforced polymer, Sprindex delivers custom coil performance in a lightweight package.

How Sprindex Works

Spring rate is determined by active coil length. By turning the Sprindex dial, the system alters the number of active coils available for deflection—adjusting your spring rate without changing coil length or affecting your preload setting. The selected spring rate is clearly displayed through the window on the dial, giving you precise control over your suspension's performance.

Progressive End-Stroke Support

While traditional coils are strictly linear, Sprindex features a progressive spring rate through the final 20% of its stroke (80–100%). This provides supple small-bump traction and plushness through the initial travel, combined with ramped-up bottom-out resistance for big hits, heavy drops, and linear frame linkages.

Key Features

• Tool-Free Adjustment: Easily turn the dial to adjust spring rate anywhere between 490 lbs/in and 560 lbs/in.


• Super High-Tensile Steel: Stronger and lighter than standard coil springs, reducing overall coil mass while handling high stress.


• Low-Friction Delrin Adapters: Includes 5 performance adapters to ensure smooth fitment across a wide range of shock models while preventing coil-windup and preload ring self-adjustment.


• Independent Preload: Adjusting spring rate does not affect preload, ensuring your sag is always achieved through proper rate rather than excessive preloading.

Specifications

• Spring Rate Range: 490–560 lbs/in (micro-adjustable)


• Stroke: 75 mm


• Length (without adapters): 160 mm


• Weight: 563 g


• Material: Super high-tensile steel coil, glass-reinforced polymer dial assembly, Delrin adapters


• Compatibility: Fits most major coil shock brands using included adapters (RockShox performance washer included)