(RAS®) RoadActive Suspension 4611-TDHD | Fits Toyota Tundra 1999-2021

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.

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.

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.

Easy to install . Havent towed with it . Haul several loads of hay about 1600 lbs. Made the truck ride and handle so much better . Even empty the truck handles better . I set it at the 2mm , black chip setting . Have a 3 horse trailer thats 4300 lbs empty waiting for spring / summer to load it and try the suppension out .

Install was straightforward on my 2017 Tundra Pro. Took it on a 1,000 mile trip pulling a trailer within a few days on putting it on. The handling and sag was much improved from previous trips. Also improved handling unloaded. I would recommend this product as Toyota is known to have soft leaf springs.

I honestly can't believe how much the RAS helped my Tundra. This product is worth every penny and then some. I tow a heavy 16' enclosed car hauler trailer filled with equipment. Towing this trailer was "doable" before and now after installing the RAS system it is a piece of cake! Towing my trailer is now stable, smooth, and safe. The ride unloaded is also improved. My truck drives flatter in the turns and with less play in the rear, but the ride is not harsh at all. Win/win! The picture is after installation

Can’t say enough good things but these are a must have if you use your truck as a truck and haul heavy loads or tow. Worked really well with stock leaf springs and installed fairly quickly and straight forward with great instructions. Prevents the rear from sagging too much under heavy load and the ride is very civilized loaded or unloaded. Every truck should come with these from the factory.

I drive a '19 Tundra and never haul anything, but I needed something in the rear end to smooth out my ride. There's not many reviews from anyone that's not a spokesperson for RAS. I like them. My truck has only leaf springs in the rear and no set up for springs without an invasive modification. This product not only helped make the ride softer and more enjoyable, but I was able to adjust my ride height to match the front

I have a 2021 Tundra, and in it I have a smartcap and a heavy duty drawer system. While these are great, I always felt the back end was lacking. I got the OME BP51 shocks fitted, which improved it a lot, but when I went to tow my small trailer, plus filling the back up, the sag was very prominent. I'd toyed with the idea of airbags, but when I read about this, I just had to get it. Way more convenient than airbags, easily installed and adjustable. When I first put it on, I went to High on the settings, so the next day I dialed it down and I can honestly say it's transformed the trucks handling. With it without the trailer, it feels so much more planted on the road. Thank you. Highly recommended