RC4WD 90mm Rock Krawler Shock Spring Assortment Four Spring Rates Z-S1189

Overview

The RC4WD 90MM Rock Krawler Shock Spring Assortment (Z-S1189) is an essential tuning component for scale rock crawlers and off-road RC vehicles across the UK. This comprehensive spring kit provides four different spring rates, allowing you to dial in the perfect suspension setup for your specific driving style and terrain conditions. Whether you're tackling rocky trails, navigating technical obstacles, or simply looking to optimize your RC car's handling characteristics, this assortment gives you the flexibility to experiment and find the ideal balance between comfort and performance.

Rock crawling has become increasingly popular among UK RC enthusiasts, and having the ability to adjust your suspension geometry is crucial for success on challenging terrain. The RC4WD Rock Krawler 90mm shocks are renowned for their durability and realistic scale proportions, making them a favourite among serious scale builders and competitive drivers alike. This spring assortment is specifically engineered to work seamlessly with RC4WD's Rock Krawler 90mm shock absorbers, ensuring perfect fitment and reliable performance every single time you take your ready to run or custom-built RC vehicle out on the trail.

For anyone serious about optimizing their RC crawler performance, whether you're a seasoned competitor or an enthusiast looking to improve your setup, this spring assortment represents an investment in better control and more predictable handling. The colour-coded identification system makes it incredibly easy to track which spring rate you're using, eliminating confusion and allowing you to make meaningful comparisons as you dial in your suspension.

Key Features

• Four Distinct Spring Rates — This assortment includes spring rates of 2.0 (Blue), 1.6 (Red), 0.8 (White), and 0.4 (Yellow), giving you a comprehensive range of stiffness options to suit different driving conditions, terrain types, and personal preferences for suspension responsiveness.
• Colour-Coded Identification — Each spring features a small colour mark at the base to help you instantly identify which spring rate you're using, eliminating the need for complicated record-keeping and making it simple to switch between setups during testing or competition days.
• Precision Engineering — RC4WD's Rock Krawler springs are manufactured to exacting tolerances, ensuring consistent performance across the entire assortment and guaranteeing that each spring delivers exactly the stiffness characteristics you expect.
• Direct Fit Compatibility — These springs are engineered specifically for RC4WD Rock Krawler 90mm shocks and also fit the RC4WD Rock Krawler RRD Emulsion Scale Dual Spring Shocks (90mm), providing confirmed compatibility with popular scale suspension systems used throughout the UK RC community.
• Complete Pairing Solution — The assortment includes enough springs for one complete pair of shocks (four springs of each rate), meaning you receive a full set ready to install and test without needing to purchase additional components.
• Quality Construction — All springs feature robust black construction with durable finish and reliable performance across countless hours of driving, whether on technical courses, aggressive terrain, or during regular weekend bashing.

Technical Performance

The RC4WD 90MM Rock Krawler Shock Spring Assortment represents the pinnacle of suspension tuning flexibility for dedicated RC crawler enthusiasts across the UK. With spring rates ranging from 0.4 to 2.0, this kit provides an exceptionally broad range of tuning options to suit everything from loose, forgiving setups perfect for rocky obstacle courses to stiff, responsive configurations ideal for technical precision driving. Each spring measures 1.29 inches (34mm) in length and features an internal diameter of 0.49 inches (12.6mm), with outside diameters carefully engineered to match each specific spring rate: the Blue 2.0 rate spring measures 0.59 inches (15.2mm) in diameter, the Red 1.6 rate measures 0.57 inches (14.6mm), the White 0.8 rate measures 0.56 inches (14.3mm), and the Yellow 0.4 rate measures 0.55 inches (14.1mm). The total weight of the complete assortment is just 1.05 ounces (30 grams), making these springs an excellent choice for weight-conscious builds where every gram matters. The precision machining ensures that spring characteristics remain consistent throughout the travel range, providing predictable and repeatable handling characteristics that allow you to make confident tuning adjustments and measure their real-world impact on vehicle performance. Whether you're fine-tuning for competition or simply exploring different suspension setups for recreational crawling, these springs deliver the quality and consistency that RC4WD is renowned for throughout the hobby.

What's in the Box

• 4x Black 90mm Shock Spring with 2.0 Spring Rate (Blue identification mark)
• 4x Black 90mm Shock Spring with 1.6 Spring Rate (Red identification mark)
• 4x Black 90mm Shock Spring with 0.8 Spring Rate (White identification mark)
• 4x Black 90mm Shock Spring with 0.4 Spring Rate (Yellow identification mark)

Frequently Asked Questions

• What is the difference between the four spring rates in this assortment? — The four spring rates (2.0 Blue, 1.6 Red, 0.8 White, and 0.4 Yellow) represent different levels of stiffness. The higher numbers indicate stiffer springs that resist compression more, providing firmer suspension response ideal for smooth terrain or when you want more responsive handling. Lower numbers like 0.4 indicate softer, more compliant springs that compress more easily, providing better absorption over rough, rocky terrain and offering a more forgiving ride over obstacles.
• How do I know which spring rate to use for my RC crawler? — Spring rate selection depends on your specific terrain, driving style, and vehicle setup. Stiffer springs (2.0 and 1.6) work well on relatively smooth tracks or if you prefer tighter, more responsive handling. Softer springs (0.8 and 0.4) excel on technical rocky terrain with lots of obstacles, as they allow the suspension to articulate more and maintain better tyre contact. The best approach is to test different rates to find what works best for your particular conditions.
• Are these springs compatible with other RC4WD shocks besides the Rock Krawler models? — These springs are specifically engineered for RC4WD Rock Krawler 90mm shocks and RC4WD Rock Krawler RRD Emulsion Scale Dual Spring Shocks (90mm). While they may physically fit other 90mm shock absorbers, we recommend only using them with confirmed compatible models to ensure optimal performance and prevent potential damage.
• Can I mix and match different spring rates on the same vehicle? — Yes, many RC enthusiasts experiment with running different spring rates front and rear to achieve specific handling characteristics. A softer spring rate in the rear combined with a stiffer rate in the front can provide different balance and control characteristics. Experimenting with different combinations is part of the fun of scale RC crawling, and this assortment gives you plenty of options to try.
• How many springs do I get in this assortment? — You receive four springs of each rate (16 springs total), which is enough to equip one complete pair of shocks with springs of any single rate, or to create mixed setups combining different rates. This quantity allows for testing and experimentation without running short.
• What makes the colour identification system useful? — The colour marks on each spring make it incredibly easy to identify which rate you're using at a glance, without needing to measure the springs or refer to documentation. This is especially valuable when you're testing different setups or swapping springs during competition days when you need quick, reliable identification.

Why Buy from RC Model Shop?

RC Model Shop is a trusted UK RC retailer and authorised dealer for all the brands we stock, including Traxxas, ARRMA, Losi, FTX, Hobbywing, Spektrum and more. Based in Walsall, we have a physical store where customers are welcome to come in, view products and purchase in store. Whether you are a seasoned competitor, a weekend basher, or just discovering the world of RC for the first time, our team of experienced RC enthusiasts is here to help you find the perfect setup and provide ongoing support. Order the RC4WD 90MM ROCK KRAWLER SHOCK SPRING ASSORTMENT Z-S1189 today with confidence, knowing you are buying from an authorised retailer with genuine products, expert knowledge and a commitment to customer satisfaction. Shop online or visit us in Walsall — we look forward to helping you get the most out of your RC experience.