ICON Vehicle Dynamics 2007-2021 Toyota Tundra Multi-Rate RXT Leaf Spring Pack with Add-In Leaf

The ICON Vehicle Dynamics Multi-Rate RXT Leaf Spring Pack is a direct bolt-in replacement leaf spring for 2007–2021 Toyota Tundra, engineered to work with the ICON RXT Rear Suspension System and deliver three user-selectable spring rates through an included add-in leaf. Sold individually; two are required per vehicle.

Shipping: ICON parts ship direct from ICON Vehicle Dynamics, mostly by UPS Ground. Lead times vary by part and some items are built to order, so please allow extra time. We email tracking as soon as your order ships.

Tunable Rate for Any Build

Most leaf springs ship with a fixed rate and leave owners to choose between ride quality and load capacity. The RXT Leaf Spring Pack solves that by including an additional leaf that can be exchanged or added to the pack, yielding a 15% or 25% increase in spring rate over the base tune. A Tundra running stock weight gets a slightly lowered base rate for improved droop travel and a more compliant ride; the same truck loaded with a bed rack, rooftop tent, or extra spare tires can step up to a stiffer rate without swapping the entire pack.

Hardware Built to Last Off-Road

A military-wrapped front eyelet reinforces the highest-stress point of the spring, improving durability where OE springs commonly fatigue. Galvanized leaf separators reduce inter-leaf friction and resist corrosion from mud, water, and road salt. Leaf tip inserts dampen noise at the ends of each leaf, keeping the pack quiet over rough terrain. ICON validates the tune, performance, strength, and durability of this spring under the "ICON 1K" test protocol of rigorous off-road conditions.

Direct Bolt-In Installation

The RXT Leaf Spring Pack mounts directly to the OEM spring location on the 2007–2021 Tundra without modification to the frame or axle perch. Installation requires U-Bolt Kit part number 52050, sold separately. Up to 25% additional wheel travel without sacrificing up-travel is available when the pack is used with ICON RXT rear shocks. The pack is not compatible with the TRD rear sway bar kit.

Features

• Three user-adjustable spring rates: base tune plus add-in leaf options for +15% or +25% spring rate
• Military-wrapped front eyelet: increased durability and strength at the spring's highest-stress point
• Galvanized leaf separators: reduce inter-leaf friction and aid corrosion resistance
• Leaf tip inserts: reduce noise and increase ride comfort
• Direct OEM bolt-in fitment: mounts to stock spring location on 2007–2021 Toyota Tundra
• ICON 1K tested: validated under rigorous off-road conditions for tune, performance, strength, and durability

Specifications

Who This Is For and Isn't

This leaf spring pack suits 2007–2021 Toyota Tundra owners who want a tunable rear suspension upgrade, whether running a lightly loaded daily driver or a heavily outfitted overland build with a bed rack, rooftop tent, or extra cargo weight. It is designed to pair with the ICON RXT rear shock system for maximum travel gain.

This pack does not fit any vehicle outside the 2007–2021 Toyota Tundra. It is not compatible with the TRD rear sway bar kit. U-Bolt Kit #52050 is required for installation and is sold separately. Each listing covers one spring; two must be purchased per vehicle.

Common Questions

How many leaf spring packs do I need for my Tundra?

The ICON RXT Leaf Spring Pack is sold individually. Two packs are required to complete a full rear suspension installation on a 2007–2021 Toyota Tundra, one for each side of the axle.

What other parts are required for installation?

Installation of the ICON RXT Leaf Spring Pack requires U-Bolt Kit part number 52050, which is sold separately. For the full travel benefit the pack is designed to deliver, it should be used in conjunction with ICON RXT rear shocks.

How does the add-in leaf work, and which rate should I choose?

The ICON RXT Leaf Spring Pack ships with an additional leaf that can be exchanged into or added to the pack. Exchanging it yields a 15% increase in spring rate over the base tune; adding it on top yields a 25% increase. Lightly loaded Tundras typically run the base rate; heavily outfitted trucks with bed racks, rooftop tents, or extra spare tires benefit from the higher rates.

Is this pack compatible with the TRD rear sway bar kit?

No. The ICON RXT Leaf Spring Pack is not compatible with the Toyota TRD rear sway bar kit. Owners running that kit will need to remove it before installing these springs.

Does this product carry a California Proposition 65 warning?

Yes. This product contains chemicals known to the State of California to cause cancer, birth anomalies, or other reproductive harm. California residents should review the full Proposition 65 warning before purchasing.