

81382
Upper Suspension Arm for Traxxas UDR (2)
Upper Suspension Arm for Traxxas UDR (2)
RPM Unlimited Desert Racer Upper Suspension Arms guarantee unbreakable performance for the life of your truck. RPM UDR A-arms are tough for a number of reasons but it all starts with some of the best engineering grade nylons in the industry. They then evaluate why the stock parts break and build replacements to solve those problems. For example, customers have reported that the pivot balls tend to rip out of stock A-arms. To fix that issue, RPM added nearly 10% more material surrounding the pivot ball and, coupled with stronger materials, virtually eliminates pivot ball breaks. RPM has also increased the amount of material in both support arms leading to the pivot ball. The extra support material means breakage along any other area of the A-arms will be virtually non-existent.
Features:
- Replaces stock Traxxas TRA8531
- Sold in pairs
- Nearly 10% more material surrounding the pivot ball
- Stronger support arms
- Identical weight to stock components
Pairs well with
Easy to use for beginners
Durable build for long-lasting fun
Quick recharge and extended range for all-day play
Perfect for pools, lakes, and calm rivers

Upper Suspension Arm for Traxxas UDR (2)
Product details
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Engineered for Speed. Built for Control.
Our RC vehicles and parts are crafted with cutting-edge tech and tested for durability. From high-speed drones to rugged RC cars and boats, every product delivers serious fun and unmatched reliability.
Performance You Can Trust
Join thousands of RC enthusiasts who count on ParkFlyers for top-tier quality, responsive customer support, and an unbeatable collection of parts and models.
Got Questions? We've Got Answers
What types of RC vehicles do you sell?
We offer a wide range of RC vehicles including airplanes, drones, helicopters, cars, trucks, boats, and a full selection of parts and upgrades for each.
Are your products ready to run (RTR) or require assembly?
Most of our models are RTR (Ready to Run) or RTF (Ready to Fly), meaning they include everything you need out of the box. Some kits may require minimal assembly—check the product description for details.
Do you offer replacement parts?
Yes! We stock replacement parts for most models we sell. If you’re not sure which part you need, contact our support team and we’ll help you find the right match.
How long does shipping take?
Orders typically ship within 1–2 business days. Delivery time depends on your location, but most customers in the U.S. receive their orders within 3–7 business days.
Do you ship internationally?
At the moment, we primarily ship within the U.S., but international shipping is available on select items. Please contact us for a custom quote.
























