Rough Country 684198 — M1R Reservoir Loaded Struts | Adjustable Height | Front | Leveling | Toyota 4Runner (25-26).

About this part

Improved Stance, Balance, and Handling: If you want to improve your vehicle's on-road performance and off-road capabilities, Rough Country's M1R Struts are the way to go. Our M1R Reservoir Struts help stabilize your vehicle's movements, enhancing control when you turn, brake, accelerate, or ride over uneven road surfaces. Designed with adjustable ride height, these M1R Struts provide superior suspension control, preventing overextension for a smoother, more consistent ride. With a 46mm monotube design and 2-inch digressive piston, they offer exceptional damping and handling, giving you the stability you need for rough terrains and off-road adventures. Whether on-road or off-road, these struts deliver fade-free performance for ultimate control and comfort. Quality Construction: Rough Country's M1R Loaded Struts are engineered for long-lasting durability and outstanding performance. Crafted from a durable 2-inch seamless extruded tube, they’re designed to withstand the toughest conditions while maintaining strength. The monotube strut with an external reservoir features an internal floating piston for better heat dissipation, ensuring your suspension performs under heavy loads and extreme conditions. The 16mm centerless-ground, case-hardened chromed rod adds further durability and corrosion resistance. Additionally, the struts feature durable vulcanized natural rubber bushings to minimize noise and vibration, enhancing comfort during your drive. The powder-coated silver finish offers superior protection against rust and environmental wear, making these struts a reliable choice for any adventure. Advanced Suspension Technology: These M1R Reservoir Struts are built for performance with self-adjusting, deflective-disc independent rebound and compression, adapting quickly to varying terrains for an even smoother ride. The 2-inch digressive piston optimizes control and comfort in all driving conditions. Plus, the increased suspension travel offers a more responsive and adaptable system, perfect for off-roading enthusiasts who demand flexibility. The superior heat dissipation and increased travel ensure you maintain peak performance, no matter how challenging the terrain. Installation and Warranty: This bolt-on installation requires basic tools and takes about 2-3 hours to complete. For added confidence, the Rough Country M1R Strut Kit is backed by a 3-year Manufacturer’s Warranty, protecting against defects and ensuring your purchase is built to last. With our comprehensive warranty, you can trust that your suspension system will perform reliably for years to come. Get peace of mind with the industry-leading warranty that ensures durability and reliability in all conditions.

Manufacturer features

Adjustable ride height: Customize your vehicle's ride height for improved handling and clearance, providing ultimate control over your suspension system. Monotube strut with external reservoir: Features an internal floating piston for enhanced shock absorption and better heat dissipation, ensuring maximum performance. Increases travel: Designed to increase suspension travel, allowing for smoother rides and greater off-road capabilities. Faster heat dissipation: Superior heat management ensures that the strut maintains peak performance even under heavy loads and extreme conditions. Durable 2-inch seamless extruded tube: Engineered with a robust, seamless design for enhanced strength and long-lasting durability. 2-inch digressive piston: Offers superior control and comfort with a piston designed for optimal damping and handling in all driving conditions. Self-adjusting, deflective-disc independent rebound and compression: Provides a more responsive and adaptable suspension system by independently adjusting to varying terrain and conditions. 16mm centerless-ground, case-hardened, chromed, and super-polished rod: Built with a high-strength, precision-machined rod for enhanced durability and corrosion resistance. 46mm monotube design: Ensures consistent, fade-free performance in any environment, whether on-road or off-road, delivering superior handling at all times. Digressive valving: Instantly adapts to changing surface conditions, providing a smoother and more controlled ride, no matter the terrain. Powder-coated silver finish: Offers resistance against harsh environmental factors like rust and corrosion, ensuring long-lasting quality. Durable vulcanized natural rubber bushings: Built to withstand high-impact environments while reducing noise and vibration for a more comfortable ride. 3-year Manufacturer’s Warranty: Confidence in your purchase with a comprehensive 3-year warranty to protect against defects and ensure lasting performance.

Important application and installation requirements

Not compatible for installation with a strut spacer, ensuring proper fit and functionality. Does NOT fit models equipped with Adaptive Variable Suspension (AVS). Does NOT fit Trailhunter models. (Models equipped with OLD Man EMU suspension.) Does NOT fit TRD PRO models. (Models equipped with TRD-tuned FOX suspension.)

Manufacturer installation time estimate

2-3 hours

Manufacturer-listed applications

2025-2026:4WD:Toyota:4Runner

Read the complete trim, drivetrain and installation restrictions. Application records are manufacturer supplied; they are not an independent fitment certification.

Manufacturer installation instructions

Manufacturer part number: 684198. Shipping weight: 53.42lbs. Supplier shipping classification: No Restrictions.

Rough Country product specifications and restrictions

Compare products and plan your setup

Compare Struts from the existing category · More from Rough Country

Find manufacturer-listed Rough Country applications. Check each part’s requirements before combining products.