Firestone Vehicle Suspension

Does your vehicle's rear sag when hooked up to a trailer/fifth wheel? Do you experience body roll when turning corners? Is your vehicle's front end elevated due to rear sagging, which causes headlights to blind oncoming vehicles, and causes difficulty steering and braking (feels like you're floating)? Does your vehicle feel very rigid when you driver over bumps and potholes? Do you want to extend the life of your vehicle's suspension and reduce tire wear?