I have timbren on my work truck (95 Dodge Ram2500 4wd Diesel) for the past 7 years. They are a cheap and simple alternative to air bags or stiffer add-a-leaf springs. The timbren's do add some side to side stability. With no load on the truck bed; the timbren's have less the 1/2" clearance off of the rear axle. I usually have 1500# to 2000# of materials or a 300 gal. tank on the truck or am towing up to 10,000# of trailer weight. The timbren ride great with a load and can be a little harsh on expansion joints (bridges and interstate) when running empty. I can remove them off of the truck in less than 5 minutes by removing four bolts. If I towed a taller profile trailer or carried a slide in camper the timbrens would be replaced with air bags and a helwig sway bar for better adjustability and added stability control.