The ARA330821 is Arrma's shock spring rated at C=0.359N/mm, fitting the 1/10 2WD monster truck range — Freedom Flyer, Gorgon and Quake. Approximately 2.05 lb/in in imperial terms, for anyone working from the American tuning charts.

The spring carries the truck's weight and sets how far the suspension travels under a given load; the shock oil controls how fast that travel happens. The two work together, and changing one without understanding the other is where most suspension tuning goes wrong. A spring that has taken a set — gone shorter and softer after a season of hard landings — will sit the truck lower at rest and bottom out earlier, and because springs sag unevenly, one tired spring on a corner will pull the chassis off level. Springs are a consumable on a bashed truck, not a permanent fitting.

Arrma produces this same 0.359N/mm rate in several colours as part of a coded tuning family. Colour indicates which SKU you have, not a different rate — all of them spring identically.

Features

• C=0.359N/mm spring rate (approximately 2.05 lb/in)
• Direct replacement for the kit-supplied spring
• Suits the 1/10 2WD monster truck shock

Fits

• Arrma 1/10 Freedom Flyer 223S 2WD RTR Brushless Monster Truck, Battery & Charger Included (ARA3530S)
• Arrma 1/10 Gorgon 223S 2WD RTR Brushless Monster Truck (ARA3530)
• Arrma 1/10 Gorgon 2WD RTA Kit Brushed Monster Truck, Battery & Charger Included (ARA3230SK)
• Arrma 1/10 Gorgon 2WD RTA Kit Brushed Monster Truck, Battery & Charger Included, Gun Metal (ARA3230SKT1)
• Arrma 1/10 Gorgon 2WD RTR Brushed Monster Truck, Blue (ARA3230T1)
• Arrma 1/10 Gorgon 2WD RTR Brushed Monster Truck, Battery & Charger Included (ARA3230S)
• Arrma 1/10 Quake 223S DSC 2WD RTR Brushless Monster Truck (ARA3537)

Monster truck platforms only. The 1/10 2WD Vorteks stadium truck and Fury short course truck use different springs.

Includes

2 x Shock Spring, C=0.359N/mm (ARA330821 / ARA-330821)