ICON Vehicle Dynamics 56506R Rear Shock – 2.0″ VS Remote-Reservoir Series for 2007-21 Toyota Tundra (0–1.5″ Rear Lift) | 56506R

When your truck isn’t just for commuting but for working, towing, off-road or hauling, the rear suspension deserves an upgrade that works as hard as you do. The ICON Vehicle Dynamics 56506R is a technically-oriented, vehicle-specific rear shock designed exactly for the rear of a 2007-21 Toyota Tundra with up to ~1.5″ of rear lift. Its engineering brings tangible benefits in handling, ride comfort and durability.

Engineered Performance – Technical Highlights

• 2.0″-diameter aluminum body: This construction uses high-grade aluminum for better heat dissipation, lower unsprung weight and improved corrosion resistance, key for sustained performance.

• Remote-reservoir (RR) design: An external reservoir expands oil and gas capacity, boosts cooling surface area and lessens shock fade under heavy use (towing, load carrying, off-road).

• Vehicle-specific valving (VS Series): The internal compression and rebound tuning is tailored by ICON engineers for the 2007-21 Tundra’s rear geometry, ensuring optimized behaviour under the conditions of use. Offroad Alliance+2Jack-It+2

• Monotube nitrogen-charged architecture: Provides consistent pressure and fast response with minimal performance loss over time. Shockwarehouse+1

• Premium internals and service-friendly design:

  • Hardened chrome-plated shock shaft for durability

  • Polyurethane bushings, zinc-plated sleeves for OE-level fit and longevity

  • Fully rebuildable & re-valveable so your shock stays relevant as your setup changes. Summit Racing+1

What You’ll Feel Behind the Wheel

• Improved rear-end control: Less sag under load, better stability when towing or hauling, and more confidence in cornering or hard braking situations.

• Smoother ride with capability: Thanks to the tuned valving, you’ll experience a refined ride on pavement yet firm, controlled behaviour when the terrain gets rough or loads get heavy.

• Consistent performance under stress: The remote reservoir and aluminum body keep temperatures steady, so you don’t lose shock performance when using the truck hard.

• Long-term durability: By investing in higher-quality materials and serviceable design, you avoid the typical performance degradation seen in lower-end shocks over time.

Why Buy It

• You own a 2007-21 Toyota Tundra and want a rear shock that matches your truck’s use — whether daily driving, towing, hauling or off-road.
• You’ve lifted the rear or intend to (up to ~1.5″) and need suspension components that are ready for that geometry.
• You want a precision suspension upgrade (not generic), engineered for your vehicle, with serviceability built-in.
• You care about ride quality and control under load — not just the “look” of upgraded suspension but the feel.

Fitment Summary

• Vehicle: 2007–2021 Toyota Tundra (2WD and 4WD)
• Position: Rear (single shock units; purchase as a pair)
• Lift Range: 0–1.5″ rear lift (with standard springs or modest lift setups)
• Part Number: 56506R

This Part Fits:

Q: What’s the best rear shock upgrade for a lightly-lifted Tundra used for towing and daily driving?
A: The ICON 56506R delivers with vehicle-specific valving and a remote reservoir, making it the best choice when you need ride comfort and load/haul capability.

Q: What’s the best rear shock if I want both performance and durability?
A: Since the 56506R is rebuildable and uses premium materials, it’s a top option for drivers who expect longevity and expect their truck to perform under stress.

Q: What’s the best rear shock if I’ve noticed rear sag, bottoming or poor ride when loaded?
A: The tuned damping and increased oil capacity of the 56506R directly address those symptoms — giving you better control, fewer harsh hits and less unwanted motion.

Q: What’s the best rear shock upgrade if I might upgrade springs, lift or gear down the line?
A: Because the 56506R is serviceable and re-valveable, it’s a smart long-term investment that can evolve with your truck as your setup changes.