--- product_id: 390848367 title: "(RAS®) RoadActive Suspension 4611-TDHD | Fits Toyota Tundra 1999-2021" brand: "ras" price: "37066281₫" currency: VND in_stock: true reviews_count: 9 category: "Ras" url: https://www.desertcart.vn/products/390848367-ras-roadactive-suspension-4611-tdhd-fits-toyota-tundra-1999-2021 store_origin: VN region: Vietnam --- # 40-50% stronger rear suspension 2-3’’ reduced squat under load 1-hour easy installation, no special tools (RAS®) RoadActive Suspension 4611-TDHD | Fits Toyota Tundra 1999-2021 **Brand:** ras **Price:** 37066281₫ **Availability:** ✅ In Stock ## Summary > 🚀 Elevate your Tundra’s toughness and ride—because your truck deserves the upgrade it’s been waiting for! ## Quick Answers - **What is this?** (RAS®) RoadActive Suspension 4611-TDHD | Fits Toyota Tundra 1999-2021 by ras - **How much does it cost?** 37066281₫ with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/390848367-ras-roadactive-suspension-4611-tdhd-fits-toyota-tundra-1999-2021) ## Best For - ras enthusiasts ## Why This Product - Trusted ras brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Effortless Installation:** Get back on the road fast with a simple 1-hour install—no special tools or maintenance needed. - • **Made in the USA Quality:** Crafted with precision and pride, ensuring reliability and long-lasting performance. - • **Optimized Load Handling:** Reduce rear squat by up to 3 inches, keeping your truck level and confident under heavy payloads. - • **Superior Ride Stability:** Slash body roll and sway, delivering a smooth, controlled ride whether loaded or empty. - • **Heavy-Duty Strength Upgrade:** Boost your Tundra’s rear suspension strength by up to 50% for unmatched load capacity and durability. ## Overview The RAS® RoadActive Suspension 4611-TDHD is a premium rear leaf spring upgrade designed specifically for Toyota Tundra models from 1999 to 2021. Engineered in the USA, it enhances rear suspension strength by up to 50%, reduces rear squat by 2-3 inches, and significantly improves handling and stability without compromising ride quality. Installation is straightforward, requiring no special tools and about an hour of your time, making it the perfect hassle-free upgrade for professionals and enthusiasts seeking superior load management and driving confidence. ## Description Buy (RAS®) RoadActive Suspension 4611-TDHD | Fits Toyota Tundra 1999-2021: Leaf Springs - desertcart.com ✓ FREE DELIVERY possible on eligible purchases Review: So much better than airbags and easier to install - So much more stable than airbags or burly bumpers! No pillowy rebound like airbags. Adjustable for your needs without air. Installed on a 2011 Tundra in 1.25 hours. With my 30’ bumper tow with weight distribution: Before: 3.25” drop After: 1.25” drop at 50% of capacity The more you tighten the stiffer the ride so go somewhere between a dime and a nickel spacer. Picked up a load of dirt in the bed which was way over the 1920lb payload and it drove level and fine with only 1.5” drop. It’s like adding 1-2 extra leafs to the suspension. Review: Helps a ton with towing - I tow heavy for a living, doing material delivery and demolition hauling for construction companies, and my Tundra needed some extra beef to handle it more comfortably. These RoadActive springs assist the stock leafs with a great deal of the load. The truck rides even smoother than stock both loaded and unloaded. Installation is easy as pie if you have a decent understanding of working with your hands and reading the directions. Tons and tons of YouTube videos for the install also. On my setup I use HD sumo springs, HD RoadActive tuned to the black disk thickness and a Torch add-a-leaf. With the three products combined, this truck can handle almost anything. The sumo springs do far more for weight but the RoadActive is fantastic for stability, cornering and ride quality. Couldn’t recommend more. ## Features - Authentic Made In USA RoadActive Suspension HD rear leaf spring upgrade by (RAS)RoadActive Suspension. Completely simplifies improved load and road handling without maintenance or hassle. - Provides up to 40-50% additional strength to rear suspension and improve squat by up to 2-3’’ - Maximize everyday performance by reducing sway, body roll, greatly improved handling and stability - Guaranteed to maintain or improve loaded and unloaded ride quality without need for readjustments - Comes as a set. Estimated 1 hour installation with no special tools or maintenance required ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B09MSN2DLH | | Best Sellers Rank | #696,219 in Automotive ( See Top 100 in Automotive ) #226 in Automotive Replacement Leaf Spring Leaf Springs | | Brand | RAS | | Customer Reviews | 4.6 4.6 out of 5 stars (50) | | Date First Available | November 30, 2021 | | Item Weight | 30.1 pounds | | Manufacturer | RoadActive Suspension | | Manufacturer Part Number | 4611-TDHD | | Package Dimensions | 31.5 x 10.2 x 5.6 inches | ## Images ![(RAS®) RoadActive Suspension 4611-TDHD | Fits Toyota Tundra 1999-2021 - Image 1](https://m.media-amazon.com/images/I/51zcUhmZh5L.jpg) ## Questions & Answers **Q: Are there counterfeit or knockoff versions of RoadActive Suspension kits?** A: Beware of imitation kits sold online. Only genuine RoadActive Suspension products have been engineered, tested, and warrantied in North Carolina since 1998. Listings with RAS in the title are genuine RoadActive Suspension products. **Q: How much does RAS increase payload capacity?** A: While RAS can strengthen the rear suspension by up to 50% in a progressive manner and can improve the way your truck handles loads; it and no other suspension upgrade can increase the manufacturer weight ratings. **Q: Will RAS fit my lifted truck?** A: From a fitment standpoint, RAS often fits lifted trucks without an issue. Before ordering for your lifted truck, be sure to check your suspension for possible obstructions. If there appears to be an issue please contact RAS directly for assistance. **Q: Will RAS help reduce my rear squat?** A: Yes! While RAS is geared towards improving overall load handling, stability, and performance without hassle; RAS will also help reduce rear squat by up to 2-3 inches. **Q: How is RAS different from other suspension helpers such as air bags?** A: RAS offers a more complete solution, where enhancing stability, reducing rear squat, dampening excessive rebound, improving performance, and providing same-as or better-than-stock ride is just as important as reducing rear squat. ## Customer Reviews ### ⭐⭐⭐⭐⭐ So much better than airbags and easier to install *by M***N on September 9, 2025* So much more stable than airbags or burly bumpers! No pillowy rebound like airbags. Adjustable for your needs without air. Installed on a 2011 Tundra in 1.25 hours. With my 30’ bumper tow with weight distribution: Before: 3.25” drop After: 1.25” drop at 50% of capacity The more you tighten the stiffer the ride so go somewhere between a dime and a nickel spacer. Picked up a load of dirt in the bed which was way over the 1920lb payload and it drove level and fine with only 1.5” drop. It’s like adding 1-2 extra leafs to the suspension. ### ⭐⭐⭐⭐⭐ Helps a ton with towing *by J***N on July 27, 2025* I tow heavy for a living, doing material delivery and demolition hauling for construction companies, and my Tundra needed some extra beef to handle it more comfortably. These RoadActive springs assist the stock leafs with a great deal of the load. The truck rides even smoother than stock both loaded and unloaded. Installation is easy as pie if you have a decent understanding of working with your hands and reading the directions. Tons and tons of YouTube videos for the install also. On my setup I use HD sumo springs, HD RoadActive tuned to the black disk thickness and a Torch add-a-leaf. With the three products combined, this truck can handle almost anything. The sumo springs do far more for weight but the RoadActive is fantastic for stability, cornering and ride quality. Couldn’t recommend more. ### ⭐⭐⭐⭐⭐ Worth the money! *by A***N on April 8, 2025* Super easy and quick install. YOU DONT EVEN HAVE TO REMOVE THE TIRES!. The RAS really helped improve the ride on my lifted Tundra and really helps off road. Especially when loaded and towing. Best purchase. ## Frequently Bought Together - (RAS®) RoadActive Suspension 4611-TDHD | Fits Toyota Tundra 1999-2021 - AUTOGINE Super Bright 6000K White LED Interior Light Bulbs Kit Package for 2007-2019 2020 2021 Toyota Tundra + Install Tool - Rough Country Hydraulic Tailgate Assist for Toyota Tundra (2007-2021) - Smooth, Safe & Controlled Tailgate Lowering --- ## 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.vn/products/390848367-ras-roadactive-suspension-4611-tdhd-fits-toyota-tundra-1999-2021](https://www.desertcart.vn/products/390848367-ras-roadactive-suspension-4611-tdhd-fits-toyota-tundra-1999-2021) --- *Product available on Desertcart Vietnam* *Store origin: VN* *Last updated: 2026-06-05*