RC4WD 70mm Ultimate Scale Shocks Internal Spring Assortment Z-S1345

Overview

Fine-tune your RC suspension setup with the RC4WD 70mm Ultimate Scale Shocks Internal Spring Assortment (Z-S1345), the essential upgrade for enthusiasts who demand precise damping control across different terrains and payloads. Whether you're running a scale crawler over rocky obstacles, tackling muddy woodland tracks, or adjusting your rig for varying track conditions, these optional internal springs deliver the suspension customisation that serious RC hobbyists require. Designed specifically for RC4WD's acclaimed 70mm Ultimate Scale Shocks, this assortment gives you the flexibility to dial in the perfect suspension feel for your driving style and terrain, making it an invaluable addition to any RC car UK collection.

The RC4WD 70mm Ultimate Scale Shocks Internal Spring Assortment represents the kind of precision engineering that separates casual RC driving from genuine performance tuning. Rather than being locked into a single spring rate, you gain access to four distinct spring rates, allowing you to experiment and optimise your suspension without purchasing multiple shock units. This is particularly valuable for UK RC enthusiasts who might be switching between different terrains — from tarmac car parks to off-road trails — or adjusting their crawler for heavier payloads and accessories. The colour-coded identification system makes spring selection quick and intuitive, so you can spend more time driving and less time squinting at component specifications.

If you're serious about getting the most from your 70mm Ultimate Scale Shocks and want the kind of suspension versatility that transform how your RC rig performs, this spring assortment is a no-brainer addition to your spares box. With enough springs included to outfit four shocks completely, you have the option to run matched spring rates across your suspension or experiment with mixed rates for unique handling characteristics.

Key Features

• Four Distinct Spring Rates — The assortment includes springs rated at 0.8, 1.2, 1.6, and 2.0, giving you genuine versatility for different driving conditions, payloads, and terrain types without needing to purchase additional shocks.
• Colour-Coded Identification System — Each spring is marked with a colour on the bottom (White for 0.8, Green for 1.2, Red for 1.6, and Black for 2.0) so you can instantly identify the correct spring rate during setup and maintenance.
• Complete Four-Shock Kit — With four springs of each rate included, you have enough components to equip all four corners of your RC rig, allowing you to run matched sets or experiment with mixed configurations.
• Precision Engineering — Manufactured to exacting standards with specifications of 0.22 inch (5.6mm) outer diameter, 0.18 inch (4.46mm) inner diameter, and 1.16 inch (29.5mm) length, these springs deliver consistent performance and durability.
• Black Surface Treatment — The durable black finish protects against corrosion and oxidation, ensuring your springs maintain their appearance and functionality through outdoor use and varied UK weather conditions.
• Lightweight Construction — At just 0.39 ounces (11 grams) per spring, these components add minimal weight to your suspension system whilst maintaining structural integrity and performance.
• Direct Compatibility — Specifically designed for the RC4WD Ultimate Scale Shocks 70mm (Silver) (Z-D0004), ensuring perfect fitment and reliable performance without modification.
• Benchmark Spring Rate — When compressed to 25mm, these springs deliver a reference spring rate of 1.32N, providing objective performance data for tuning and setup documentation.

Technical Performance

The RC4WD 70mm Ultimate Scale Shocks Internal Spring Assortment represents thoughtful engineering focused on delivering genuine suspension tunability. Each spring is manufactured to tight tolerances, with the outer diameter of 5.6mm and inner diameter of 4.46mm ensuring consistent performance and reliable fitment within the shock body. The 29.5mm length places these springs in the scale-appropriate range for 70mm shock units, maintaining the proportions and visual authenticity that attracts serious scale crawlers and rock-crawling enthusiasts in the UK RC community. The black surface treatment is more than cosmetic — it actively protects the spring steel from corrosion during wet conditions and muddy terrain work, extending the lifespan of your suspension components. The range of spring rates from 0.8 through to 2.0 spans a genuine performance envelope, allowing you to address specific handling issues whether you need softer damping for compliance over small obstacles or stiffer damping to support heavier loads and aggressive driving. The reference specification of 1.32N when compressed to 25mm provides an objective baseline for comparing your setup against other configurations, making it easier to document your tuning changes and share setup notes with fellow RC enthusiasts.

What's in the Box

• 4x 70mm Shock Spring (0.8 spring rate marked White)
• 4x 70mm Shock Spring (1.2 spring rate marked Green)
• 4x 70mm Shock Spring (1.6 spring rate marked Red)
• 4x 70mm Shock Spring (2.0 spring rate marked Black)

Frequently Asked Questions

• Will these springs work with my 70mm Ultimate Scale Shocks? — These springs are specifically designed for the RC4WD Ultimate Scale Shocks 70mm (Silver) model Z-D0004, so compatibility is guaranteed if you're running this shock unit. They will not fit other shock brands or sizes, so always verify your shock model before ordering.
• How do I know which spring rate to use for my setup? — The colour markings on each spring bottom make identification straightforward: White is 0.8 (softest), Green is 1.2, Red is 1.6, and Black is 2.0 (stiffest). Start with the middle rates (Green or Red) and adjust based on how your rig performs — if it feels too bouncy, try stiffer springs; if it feels harsh and unresponsive, try softer springs.
• Can I mix different spring rates on the same RC rig? — Absolutely, and many experienced RC enthusiasts do this deliberately. You might run stiffer springs on the rear for load support whilst using softer springs on the front for compliance, or vice versa depending on your specific driving style and terrain. The assortment gives you enough springs to experiment with different configurations.
• Do I need any special tools to change the springs? — The specific tools required depend on your shock design, but generally you'll need a small wrench or hex key to disassemble your shocks and access the internal springs. Always refer to your shock assembly instructions for the correct procedure and tools needed.
• Is this suitable for beginners? — Spring selection and suspension tuning require some mechanical knowledge and understanding of how spring rates affect vehicle handling, so this is more suitable for intermediate and experienced RC enthusiasts rather than absolute beginners. However, if you're willing to learn suspension tuning and experiment with different rates, the assortment provides an excellent educational tool.
• What is the difference between these springs and other aftermarket options? — RC4WD springs are manufactured to OEM standards and specifically engineered to work within RC4WD 70mm shocks, ensuring precise fitment and predictable performance. The colour-coded system makes setup intuitive, and the inclusion of four rates in one package offers excellent value for tuning-focused drivers.

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 70MM ULTIMATE SCALE SHOCKS INTERNAL SPRING ASSORTMENT Z-S1345 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.