--- product_id: 115487350 title: "RPM Rear A-arms Arrma 3S 4x4-Big RockSentonGranite RPM81502 Electric Car/Truck Option Parts" brand: "rpm" price: "$26.01" currency: USD in_stock: true category: "Rpm" url: https://www.desertcart.us/products/115487350-rpm-rear-a-arms-arrma-3s-4x4-big-rocksentongranite-rpm81502 store_origin: US region: United States of America --- # Lightweight design boosts speed and handling Dual shock mount holes for ultimate adjustability Engineered nylon for unmatched durability RPM Rear A-arms Arrma 3S 4x4-Big RockSentonGranite RPM81502 Electric Car/Truck Option Parts **Brand:** rpm **Price:** $26.01 **Availability:** ✅ In Stock ## Summary > ⚡ Upgrade your ARRMA’s edge with RPM Rear A-arms — where precision meets power! ## Quick Answers - **What is this?** RPM Rear A-arms Arrma 3S 4x4-Big RockSentonGranite RPM81502 Electric Car/Truck Option Parts by rpm - **How much does it cost?** $26.01 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/115487350-rpm-rear-a-arms-arrma-3s-4x4-big-rocksentongranite-rpm81502) ## Best For - rpm enthusiasts ## Why This Product - Trusted rpm brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Race-Ready Stability:** Lower ride height enhances trackability and corner speeds across all terrains. - • **Unbreakable Durability:** Crafted from RPM’s signature engineering-grade nylon to survive the toughest crashes. - • **Lightweight Performance:** Optimized design sheds unnecessary weight for faster acceleration and sharper handling. - • **Perfect Fit for ARRMA 3S 4x4:** Seamlessly replaces stock #AR330516 on Big Rock, Granite & Senton models. - • **Precision Tuned Adjustability:** Second shock mount hole lets you dial in ride height and cornering stability like a pro. ## Overview RPM Rear A-arms are engineered replacement parts for ARRMA 3S BLX 4x4 Big Rock, Granite, and Senton models, featuring dual shock mount holes for enhanced adjustability, durable engineering-grade nylon construction for superior crash resistance, and a lightweight design that improves handling and speed. These A-arms directly replace stock part #AR330516, offering racers and hobbyists a performance upgrade that boosts stability and cornering on all surfaces. ## Description RPM A-arms for the 44 3S BLX versions of the Granite, Senton & Big Rock are the answer to the questions you didnt know you had. Are you looking for more adjustability? Check! How about better durability? Got that covered too. How about light weight ? Yup, no problem!Adjustability: Weve added a second shock mount to both our front and rear A-arms to the outside of the stock shock mount, adding adjustability and improving trackability. Our outer shock mount lowers the ride height, increasing stability on all surface types. A lower ride height also means faster corner speeds. Durability: Molded from our trademark blend of indestructible, engineering grade nylons, you cant get much tougher! Weve also redesigned the shape of the A-arms while retaining stock suspension geometry to help improve survivability for those oops moments. light weight : With our stronger materials and improved designs, were able to cut out unnecessary weight while still offering suspension components that are unparalleled in performance and durability. TechNOTES: RPM A-arms fit the following ARRMA vehicles; Big Rock 44 (#AR102711), Senton 44 (#AR102668, #AR102667 & #AR102678) & Granite 44 (#AR102665, #AR102666 & #AR102676). RPM Rear A-arms replace ARRMA #AR330516.TechNOTES: RPM A-arms fit the following ARRMA vehicles; Big Rock 44 (#AR102711), Senton 44 (#AR102668, #AR102667 & #AR102678) & Granite 44 (#AR102665, #AR102666 & #AR102676). RPM Rear A-arms replace ARRMA #AR330516.Version CompatibilityNOTES: Big Rock owners, please use caution and double check the stock ARRMA part number of the a-arm you are replacing. Some Big Rock versions use the Granite 44 a-arms shown here while others use Typhon 3S a-arms. ## Features - Fits 3s BLX 4×4 versions of the Big Rock, Granite & Senton - Exclusive 2nd shock mount hole for added adjustability - Replaces stock #AR330516 ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07PPSQFNH | | Age Range Description | Kid | | Best Sellers Rank | #266,613 in Toys & Games ( See Top 100 in Toys & Games ) #147 in RC Vehicle Suspension A-Arms | | Brand Name | RPM | | Customer Reviews | 4.6 4.6 out of 5 stars (252) | | Educational Objective | Team Building Skills | | Indoor Outdoor Usage | Outdoor | | Item Dimensions | 4.5 x 4 x 0.5 inches | | Manufacturer | RPM | | Manufacturer Part Number | RPM81502 | | Manufacturer recommended age | 14 months - 9 years | | Material Type | Plastic | | Model Number | RPM81502 | | Number of Packs | 1 | | Number of Players | 1 | | Operation Mode | Manual | | Power Source | Battery Powered | | Set Name | Arrma | | Size | Small | | Supported Battery Types | rechargeable battery pack | | Theme | Sports | | UPC | 672415815021 | | Unit Count | 1 Count | ## Images ![RPM Rear A-arms Arrma 3S 4x4-Big RockSentonGranite RPM81502 Electric Car/Truck Option Parts - Image 1](https://m.media-amazon.com/images/I/418jA2PyW1L.jpg) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/115487350-rpm-rear-a-arms-arrma-3s-4x4-big-rocksentongranite-rpm81502](https://www.desertcart.us/products/115487350-rpm-rear-a-arms-arrma-3s-4x4-big-rocksentongranite-rpm81502) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-09-27*