Wishlist
Checkout
Wishlist
Post results
    View all posts
    Product results
      View all products

      Cart

      No products in the cart.

      RC Cars

      Excitement for a lifetime

      Servo Arms

      Servo arms are essential components that transfer movement from the servo to your RC vehicle’s steering, throttle, brake, or auxiliary systems. Choosing the correct servo arm improves steering precision, durability, and overall control while helping to reduce unwanted flex under load. We offer a wide selection of aluminum, composite, and heavy-duty servo arms compatible with popular 21T, 23T, 24T, and 25T spline servos from leading RC brands.

      Servo Arms – Complete Buying Guide
      Servo arms are often overlooked, yet they play a major role in the performance and reliability of any RC vehicle. Even the most powerful servo cannot perform properly if paired with an unsuitable or flexible servo arm.
      A high-quality servo arm improves steering accuracy, reduces flex, and ensures efficient power transfer from the servo to the steering system. This is particularly important in crawlers, racing vehicles, monster trucks, and high-speed RC applications.
      Why Upgrade Your Servo Arm?
      Many RTR vehicles come equipped with molded plastic servo arms. While these work adequately for casual use, upgrading to a stronger servo arm can provide significant benefits:

      Improved steering precision
      Reduced flex under load
      Better durability
      More consistent steering feel
      Increased reliability with high-torque servos

      Aluminum vs Composite Servo Arms
      Aluminum Servo Arms
      Aluminum servo arms are the preferred choice for performance-oriented applications.
      Benefits include:

      Maximum rigidity
      Superior durability
      Increased steering precision
      Ideal for brushless and high-torque servos
      Excellent for crawlers and racing vehicles

      Recommended for:

      Crawlers
      Rock Crawlers
      1/8 Buggies
      1/8 Truggies
      Touring Cars
      Drift Cars
      Monster Trucks

      Composite Servo Arms
      Composite servo arms remain popular for many applications.
      Benefits include:

      Lower weight
      Lower cost
      Some impact absorption
      Reduced risk of damaging servo gears during crashes

      Recommended for:

      Beginner vehicles
      Lightweight models
      Scale builds
      Aircraft applications

      Understanding Servo Splines
      Servo arms are not universal. The spline count must match the servo output shaft.
      Common spline standards include:

      Spline
      Common Brands

      25T
      Savöx, SRT, AGFRC, Power HD

      24T
      Hitec

      23T
      KO Propo, some Sanwa

      15T
      AGFRC Large Scale

      Using the wrong spline type can damage both the servo arm and the servo output shaft.
      Choosing the Right Servo Arm Length
      Servo arm length affects both steering speed and steering force.
      Short Servo Arms
      Advantages:

      More steering torque
      Better holding power
      Increased durability

      Best for:

      Crawlers
      Rock Crawlers
      Heavy vehicles

      Long Servo Arms
      Advantages:

      Greater steering throw
      Faster steering response
      Increased steering angle

      Best for:

      Touring Cars
      Drift Cars
      Racing Vehicles

      Popular Applications
      Crawler Servo Arms
      Crawlers place extreme loads on steering systems. Aluminum servo arms are strongly recommended to maximize durability and steering precision.
      Racing Servo Arms
      Touring cars and buggies benefit from rigid servo arms that maintain precise steering geometry at high speed.
      Boat Servo Arms
      Water-resistant aluminum servo arms help maintain reliable steering performance in marine applications.

      Frequent Questions & Answers
      What does a servo arm do?

      A servo arm (also called a servo horn) connects the servo output shaft to the steering, throttle, brake, or other control linkages. It transfers the servo’s movement into mechanical motion, making it a critical part of any RC control system.

      Should I choose an aluminum or plastic servo arm?

      Aluminum servo arms offer maximum strength, precision, and durability, making them ideal for crawlers, racing vehicles, and high-torque servos. Plastic servo arms are lighter and can sometimes act as a sacrificial part during crashes, helping protect the servo gears.

      How do I know which servo arm fits my servo?

      The most important factor is the spline count and diameter of the servo output shaft. Common spline configurations include:

      • 25T – Savöx, SRT, AGFRC, Power HD, Futaba and many others
      • 24T – Hitec
      • 23T – KO Propo and some Sanwa models
      • 15T – AGFRC Large Scale

      Always verify your servo’s spline specification before purchasing a servo arm.

      Do I need an aluminum servo arm for a crawler?

      For most crawlers and rock crawlers, an aluminum servo arm is highly recommended. Large tires and high steering loads can quickly wear or flex plastic servo arms, reducing steering precision and reliability.