Just installed a set of "Super Springs" and couldn't be happier. One of the few products that actually lives up to 100% of it's claims.
This product not only does a fantastic job of replacing expensive air-ride systems and the leak and compressor problems that go along with them when towing or hauling heavy loads, but the stock ride feels exactly the same with the exception that they eliminate a lot of rear end sway, bed bounce and wheel hop.
I towed my 32 foot, 8,700 pound travel trailer without the weight distribution hitch this weekend, and only used my Reese anti-sway bar to see what would happen. The ride was fantastic! Solid control cornering on tight mountain roads and when passing semi's on two lane highways, and none of the "bouncing ball" feel I'd sometimes get with the air-ride system on my 98 Dodge Ram.
I measured the hitch height before hooking up, and it only dropped 1.5" over stock with nothing on it.
Before I went on my trip I ran down the freeway over a concrete section were the semi's have created "waves". Running over this section the day before set up some pretty serious bed bounce between 65 and 70. With these springs I had zero bounce running the same stretch of freeway. That's worth the price alone ($279.99 plus $45.00 for the mounting kit required for the 07 Tundra.)
I also notice a
lot less rear end sway taking some sharp freeway transitions; (40 mph speed limit taken at 67 with dry road conditions.) And this is in a 4x4 with a higher CG! Before I installed the springs I would start to feel uncomfortable hitting this turn at 55 mph.
(By the way, I don't advocate everyone doing this because this is how people get killed. I've been road racing cars for over 20 years, and I progressively push the envelope on familiar roads like this when there's no traffic. I don't do it with others in the truck, so if I loose it and crash, I'm not going to be taking others with me.)
The install was very easy. The instructions could have been a little more detailed, and you MUST be careful that the install doesn't crimp, crush or cut your break lines as that would be a very bad scene! I had to hand bend the stock brake line brackets to make sure nothing would rub.
You also need to use a hack saw to remove 1" off the top of each bumper stop so you can install the above axle brackets that hold the springs. You could totally remove the bumpers if you wanted, as you'll never be bottoming out against the frame once you install these babies.
The springs for the 07 Tundra are rated at 3,000 pounds, and work in conjunction with the stock springs. The beauty of these springs are that they don't work like typical helper springs that are "always on" and make your ride uncomfortably hard. These springs are tapered and have rolling shackles that only start working when you add load. They're truly progressive, which means the amount of positive force against the load is proportional to the amount of weight being loaded, so they're like an active air-ride system that's constantly adjusting psi.
Something I had to find out for myself. I tried to have all of the lower shackle bolts facing in, but soon realized I at least had to have the bolt on the forward side of the spring on the driver's side facing out, as the bolt was so long that it would have rubbed against the gas tank skid plate and possibly the gas tank itself, and you don't want that!
So, if you tow or haul heavy loads with your truck, or are just looking for a much more stable ride without a hard feel, bed bounce or wheel hop, then do yourself a favor and check these out!
