I am swapping out the 5100 and 5125 on my '97 Tacoma 4WD to the Bilstein 6112 in the front. I am looking into getting the 5165 for the rear, but it was suggested to me to get the 7100's, since they are basically the same as the 5165, but are revalveable, rebuildable and have a short body option at almost the same price. I have compared the specs between similarly sized and valved 5165 and 7100. The 7100 are a little stiffer with a valving of 275/78 and the 5165 are 255/70. Does anybody have any experience with the two? Wondering if there's any differences Also, I like how the 5100 and 5125 handle and ride. The 5125 might be a little stiff when the bed is empty, but when I'm hauling noticeable weight or a trailer, they seem fine. So, I am wondering if the 7100 might be a little stiff compared to the 5165 or if they can be revalved the same as what the 5125 are.