I run the 896's with a full steel rear bumper, and tire carrier with a 33" spare hanging out back. To me, the springs are borderline too heavy even with that load. When I have the rear loaded up for trips and a couple people in the car, it feels about right. I got about 2.5" of lift over OEM springs and about .75" more than the Icon springs I had on previously. I swapped to the OME springs because I was bottoming out the Icon Springs too easily. I believe the Icon springs are around a 215# spring compared to the OME 896 springs which are 318. and OEM springs which are around 180# I think... they may be less.
So here is how it breaks down:
Here is a photo of the OEM Toyota Spring on the left, Icon in the middle, and OME 896 on the right.
So the OME 896 and 898 are both 318# springs, referred to as heavy springs. The 896's net around 2.5" +/- of lift and the 898's net around 3.0" +/- lift
The OME 889 and 895 are both 260# springs, referred to as medium springs. 889's are meant for a 3" or so lift, the 895's are closer to 2.5" lift depending on other factors.
Lastly, you have the XXL ultra heavy OME springs - The 897 and the 899. The are both 387# springs and provide approx. 2.5" and 3" of lift, respectively. I can't imagine a scenario where those would be wanted, except someone who had their truck loaded down to the max and was towing...
I would look at the 889's or 885's if I were you. Even with all the weight I have on my truck, I may swap the 896's out for the 889's here soon for a bit better flex and softer ride.
PS-
I have also ran the OEM springs with spacers:
And I had a custom set of Deavers wound up, which were sent back shortly after. They were way to stiff and cost 2x as much as the Icon or OME springs. Not worth it to get custom springs would unless you are doing something truly custom with a different shock setup or something. There are plenty of viable options in spring rates and lift heights out there to satify 99.99% of the market.
Here are the Deavers: