RPM Front or Rear A-Arms for Traxxas Slash 4x4 1:10 Red RPM80709

Overview

The RPM Front or Rear A-Arms for Traxxas Slash 4x4 in striking red are premium suspension upgrades designed to transform the handling and durability of your RC short course truck. Whether you're a seasoned RC car enthusiast in the UK or a weekend basher looking to improve your vehicle's performance, these A-arms represent a significant step up from factory standard components. RPM, the legendary American manufacturer based in southern California, has engineered these parts to deliver tighter tolerances, reduced play, and dramatically improved durability compared to stock Traxxas suspension arms. This is the suspension upgrade that serious RC enthusiasts choose when they want their Slash 4x4 to handle with precision and consistency lap after lap.

These A-arms are compatible with the 1:10 scale versions of the Traxxas Slash 4x4, Jato 4x4, Stampede 4x4, Rustler 4x4, Hoss 4x4, and Rally 4x4 models, making them a versatile choice for owners of multiple Traxxas vehicles. RPM has engineered these components to replace the stock Traxxas parts (numbers 3655R and 3655X) with a direct fit that requires no modifications or additional components. The red colour option allows you to add a splash of custom style to your suspension while maintaining the premium engineering that RPM is renowned for across the RC hobby world.

What sets these A-arms apart from competitor offerings is the combination of weight savings, improved geometry, and aesthetic appeal. RPM has cut 6.5 grams of weight off each individual A-arm compared to stock components, which translates to just under one ounce of total weight reduction per suspension corner when you upgrade to a complete set. In the RC hobby, especially for short course racing, every gram counts towards improving acceleration, deceleration, and overall handling characteristics.

Key Features

• Eliminated suspension slop — RPM has tightened the tolerances around the hinge pins to remove play and vagueness from your suspension system, resulting in more responsive and predictable handling through corners and over rough terrain.
• Reduced fore and aft movement by over 90% — The A-arm mounting points at both the inner hinge pin and the axle carriers have been engineered to reduce unwanted movement by more than 90% compared to stock, translating to more consistent suspension behaviour and improved cornering stability.
• Dramatically improved durability — RPM manufactures these A-arms from their trademark blend of incredibly durable nylons, which means they're built to withstand the punishment of serious RC bashing and racing without cracking or breaking under stress.
• 6.5 gram weight reduction per arm — Each A-arm is 6.5 grams lighter than the stock Traxxas equivalent, saving just under one ounce total per corner when fully upgraded, which improves acceleration and reduces unsprung weight for better suspension responsiveness.
• Professional aesthetic design — The A-arms feature RPM's traditional design language with precisely moulded 30-degree leading and trailing edges that not only look professional but also contribute to the strength and rigidity of the component.
• Large shock and sway bar bosses — Generous mounting bosses for shock towers and anti-roll bar connections ensure solid attachment points with no flex, maintaining consistent suspension geometry during aggressive driving.
• Available in multiple colours — Choose from black, blue, green, or red to match your RC vehicle's colour scheme and express your personal style while upgrading your suspension performance.
• Industry-leading warranty — RPM stands behind these products with a comprehensive warranty that reflects the company's confidence in the quality and durability of their engineering.
• Made in the USA — Designed, manufactured, and produced in southern California, these A-arms represent American engineering excellence in the RC hobby industry.
• Direct stock replacement — These A-arms are a plug-and-play upgrade that replaces Traxxas parts 3655R and 3655X with no modifications required, making installation straightforward for RC enthusiasts of any experience level.

Technical Performance

The engineering behind these RPM A-arms represents a significant advancement in suspension technology for 1/10 scale short course trucks. The key to their performance lies in the precision engineering of the hinge pin tolerances, which eliminates the play and slop that characterises stock suspension systems. RPM has redesigned the geometry of the mounting points at both the inner hinge pin (where the A-arm connects to the chassis) and at the axle carriers (where the suspension arm connects to the wheel hub assembly) to reduce fore and aft movement by more than 90%. This dramatic reduction in unwanted suspension movement means your Slash 4x4, Rustler 4x4, Stampede 4x4, or other compatible 1:10 scale truck will respond with consistency and precision, whether you're carving through a technical course, hitting jumps at speed, or pushing hard in competitive racing conditions. The material composition—RPM's proprietary blend of durable nylons—provides the perfect balance between flexibility to absorb impacts and rigidity to maintain suspension geometry. These nylon compounds have been proven through years of development to withstand the stresses of serious RC bashing without becoming brittle or developing stress cracks. The weight reduction of 6.5 grams per arm is achieved through careful material selection and geometry optimisation rather than compromising on strength, meaning you gain the benefits of lighter unsprung weight without sacrificing durability. The large bosses moulded into the shock tower and sway bar mounting points ensure that forces are distributed efficiently through the component rather than concentrating at small attachment points, which extends service life and maintains consistent suspension characteristics over time.

What's in the Box

• 1 pair of RPM A-arms (left and right) in red
• Ready to install with no additional hardware required

What You Need to Complete

• A second package of RPM A-arms to complete both front and rear suspension upgrade (each package contains one pair for either front or rear installation)
• Your compatible Traxxas model (Slash 4x4, Rustler 4x4, Stampede 4x4, Jato 4x4, Hoss 4x4, or Rally 4x4 in 1:10 scale)

Important Compatibility Notes

These RPM A-arms are specifically engineered for the 1:10 scale versions of Traxxas vehicles and will not fit the Rally ST variant—if you own a Rally Fiesta ST, please refer to RPM part number 73362 instead. Additionally, Jato 4x4 owners should be aware that these A-arms are not compatible with Traxxas sway bar kits, so you'll need to retain your current anti-roll bar setup. There is a design consideration regarding the rear axle carriers: the upper hinge pin hole of the rear axle carriers cannot be used with these arms due to strengthening designs that reduce the clearance around the rear axle assembly, but this is not a stock location for the Slash 4x4 and other compatible models anyway, so it does not affect normal installation or operation.

Frequently Asked Questions

• How many packages do I need to upgrade my Slash 4x4 completely? — You will need two packages of RPM A-arms to complete one full vehicle, as each package contains one pair (left and right) suitable for either front or rear installation. One package upgrades the front suspension, and a second package upgrades the rear suspension.
• Will these A-arms fit my Traxxas Rustler 4x4 or Stampede 4x4? — Yes, these RPM A-arms are fully compatible with the 1:10 scale versions of the Traxxas Rustler 4x4, Stampede 4x4, Hoss 4x4, Jato 4x4, and Rally 4x4 models. They are a direct replacement for Traxxas parts 3655R and 3655X across all these vehicles.
• How much weight will I save by upgrading to RPM A-arms? — Each individual A-arm weighs 6.5 grams less than the stock Traxxas equivalent, which means upgrading one corner of your suspension saves 6.5 grams. A complete front and rear suspension upgrade (two packages) would save just under one ounce of total vehicle weight, improving acceleration and handling responsiveness.
• What makes RPM A-arms better than stock Traxxas components? — RPM has engineered these A-arms to eliminate suspension slop by tightening tolerances around hinge pins, reduce fore and aft movement at both the inner hinge pin and axle carriers by more than 90%, and improve durability through use of their trademark durable nylon blend. The result is more consistent, responsive handling and longer component lifespan.
• Do these A-arms require any modifications or special installation? — No, these are a direct replacement for stock Traxxas parts 3655R and 3655X with no modifications required. Installation is straightforward and suitable for RC enthusiasts of any experience level.
• Why do RPM A-arms cost more than stock replacements? — RPM's engineering improvements, including tighter tolerances, redesigned geometry, improved durability, and superior materials, justify the investment. The reduction in suspension slop and improved handling precision make these upgrades worthwhile for any RC enthusiast serious about performance.
• Are these available in other colours besides red? — Yes, RPM manufactures these A-arms in black, blue, green, and red, allowing you to choose the colour that best matches your RC vehicle's aesthetic.
• What is RPM's warranty on these A-arms? — RPM stands behind these products with an industry-leading warranty that reflects the company's confidence in the quality and durability of their engineering.

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 FRONT or REAR A-ARMS FOR TRAXXAS SLASH 4x4 - RED 1pr RPM80709 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.