Originally Posted by SIX-1-NINE Motorsports
I dont know about anyone else's thoughts on this kind of situation but here is my thought. Being that the 5100's are preload adjustable the O.E. coil springs are sufficient and will offer the best possible ride quality. Toyota has spend millions in R&D developing their coil springs to be progressive and rated for the weight of the specific models. Setting the preload ring at the 2" setting will lift the truck while saving the added money you would spend on OME springs. Just my thoughts...
Hey, Jon. Some things to consider. The OEM Toyota spring has a 540# rate. As you add preload to the spring, you are increaseing its spring rate. The Bilstiens have adjustments from a stock setting on up to 2.5". When set at a 2.5" setting, the spring is compressed and in less of a space, to acheive the lift. The OME springs are a 590# spring rate, and they are Longer than stock springs. SO, in the same space of the stock spring, you get more lift, with only a slight increase in spring rate, giveing a better ride.
Also, IMHO, Progressive springs arent that good off road. A straight rate spring is prefered. Look at all the big name coilover makers. They all use a standard rate spring, as does OME, as opposed to a "Progresive rate".