RPM Pink Rear A-Arms for Traxxas Electric Stampede Rustler 2WD RPM80187

Overview

The RPM Pink Rear A-Arms for Traxxas Electric Stampede or Rustler represent a sophisticated upgrade solution for RC enthusiasts looking to enhance their 2WD electric vehicle's suspension performance. These precision-engineered components combine lightweight construction with superior durability, making them an ideal choice for anyone serious about improving their RC car handling and consistency. Whether you're a competitive racer fine-tuning your setup or an RC hobbyist seeking better performance from your Traxxas electric Stampede 2WD or Rustler 2WD, these rear A-arms deliver tangible improvements that translate directly to on-track results.

RPM has engineered these replacement A-arms to be stronger and more durable than factory Traxxas parts whilst simultaneously eliminating over 7 grams of weight per arm. This represents a significant achievement in suspension tuning, as reducing unsprung weight improves suspension response and overall handling characteristics. The pink colour option adds visual appeal whilst maintaining the same performance characteristics as the black, blue, green and red alternatives. For serious RC car UK enthusiasts, these arms represent genuine value-for-money suspension upgrades that professional and weekend bashers alike will appreciate.

These rear A-arms replace the stock Traxxas #3655 and #3655X components and fit exclusively the 2WD versions of the electric Stampede and electric Rustler. By installing a matching set of RPM front A-arms alongside these rear components, total weight savings exceed 24 grams—nearly a full ounce—without sacrificing any rigidity or introducing weak points into your suspension geometry.

Key Features

• Significant Weight Reduction — Each A-arm sheds more than 7 grams compared to stock Traxxas components, and a complete pair eliminates 14 grams of unsprung weight. This reduction dramatically improves suspension response, allowing your shocks to react more quickly to track conditions and resulting in better handling and consistency during racing or bashing.
• Enhanced Durability — RPM's ultra-durable nylon blend material ensures these A-arms are stronger and longer-lasting than factory parts, without introducing any weak points. You gain durability and strength alongside the weight savings, a rare combination that justifies the investment in quality aftermarket suspension components.
• Maintained Rigidity and Stiffness — Despite reducing weight, RPM engineers maintained the structural stiffness that competitive racers demand. These A-arms flex no more than stock versions, meaning you get performance gains without compromising suspension precision or track feedback.
• Reduced Suspension Slop — These rear A-arms eliminate over 0.030 inches (1/32 inch or 0.8mm) of slop from the inner arm mount and more than 0.010 inches (just under 1/64 inch) at the outer hinge pin. This reduction in play creates a smoother, more responsive suspension system with improved consistency and predictability on the track or in the dirt.
• Improved Shock Mount Tuning — RPM engineers slightly revised the shock mount locations to provide more noticeable adjustment changes when using the inner or outer shock mount holes. The centre shock mount remains in the stock location for easy setup transitions, allowing drivers to make meaningful tuning adjustments whilst maintaining compatibility with standard Traxxas setups.
• Available in Multiple Colours — The pink option offered here is one of five available colours, including black, green, blue and red. This allows you to match your chosen colour scheme or build a custom-themed RC vehicle.
• Direct Stock Replacement — These A-arms directly replace Traxxas stock #3655 and #3655X components, ensuring perfect fitment with your Rustler 2WD electric or Stampede 2WD electric without requiring modifications or additional adapters.

Technical Performance

These rear A-arms represent precision suspension engineering at its finest. Manufactured from RPM's proven ultra-durable nylon blend material, they deliver the kind of performance improvements that serious RC enthusiasts seek when upgrading their Traxxas electric Rustler or Stampede 2WD platform. The weight reduction—7 grams per arm, totalling 14 grams for the pair—has measurable effects on suspension dynamics. This unsprung weight reduction improves how quickly your shock absorbers respond to track inputs, resulting in better traction consistency and more predictable handling characteristics. The engineering focus on eliminating suspension slop, particularly at the inner arm mount (0.030 inches) and outer hinge pin (0.010 inches), creates a noticeably tighter, more precise suspension system. When combined with properly tuned shocks and dampers, this slop reduction translates to improved steering response and better feedback from the track surface. The revised shock mount positions offer enhanced tuning capability without departing from the proven Traxxas suspension geometry, making these arms suitable for drivers transitioning from stock setups whilst providing experienced tuners with additional adjustment options. Built from material that has proven itself in demanding racing environments, these A-arms represent a significant quality step up from factory Traxxas components while maintaining perfect mechanical compatibility with your electric Stampede or Rustler 2WD platform.

What's in the Box

• One left rear A-arm (pink)
• One right rear A-arm (pink)

What You Need to Complete

• Traxxas Electric Stampede 2WD or Electric Rustler 2WD (or compatible vehicle using this suspension design)
• Basic RC tools for suspension work
• Shock absorbers and springs (vehicle-specific)
• Hinge pins and hardware (usually retained from stock A-arms)

Frequently Asked Questions

• Will RPM pink rear A-arms fit my Traxxas Rustler or Stampede? — These A-arms fit exclusively the 2WD versions of the electric Stampede and electric Rustler, replacing stock Traxxas #3655 and #3655X components. They are not compatible with 4WD versions or nitro-powered variants. Verify your vehicle is a 2WD electric model before purchasing.
• How much weight do these A-arms actually save? — Each A-arm reduces weight by more than 7 grams compared to stock Traxxas parts. A complete pair saves 14 grams of unsprung weight. If you pair these with matching RPM front A-arms, total weight savings exceed 24 grams—nearly a full ounce—without any loss of durability or rigidity.
• Will lighter A-arms compromise durability? — No. RPM achieved this weight reduction without introducing weak points or increasing flex. The material is actually stronger and more durable than stock Traxxas parts. RPM engineers ensured these arms maintain the stiffness and reliability that competitive racers demand.
• What is the benefit of reduced suspension slop? — Removing 0.030 inches of slop from the inner arm mount and 0.010 inches from the outer hinge pin creates a tighter, more responsive suspension system. This reduction in play improves consistency and predictability, allowing your shocks to perform more precisely and your vehicle to respond more predictably to track inputs and terrain changes.
• Can I use just the rear A-arms, or should I buy fronts as well? — You can use just the rear A-arms for an upgrade. However, RPM recommends installing matching front A-arms for optimal suspension balance and maximum benefit. Using both front and rear sets provides total weight savings exceeding 24 grams and ensures consistent improvements across your entire suspension system.
• Do the revised shock mount locations require a complete suspension rebuild? — No. The centre shock mount position remains in the stock location, allowing easy setup transitions from stock A-arms. The inner and outer shock positions offer additional tuning options for drivers who want to make more noticeable adjustment changes, but you can maintain your current setup if preferred.
• Are these arms suitable for competitive racing? — Yes. These A-arms are designed for both competitive racing and recreational bashing. The combination of weight reduction, improved rigidity, reduced slop and enhanced shock mount tuning capability makes them particularly valuable for racers seeking setup refinement and consistent performance.
• What material are these A-arms made from? — These A-arms are moulded from RPM's ultra-durable nylon blend, which has proven itself in demanding RC racing environments. This material provides superior durability compared to stock Traxxas plastic whilst maintaining the light weight necessary for performance improvements.

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 RPM PINK REAR A-ARMS FOR TRAXXAS ELECTRIC STAMPEDE OR RUSTLER RPM80187 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.