Both stock and custom anti-sway bars are designed as a link between the suspension and the frame, and both use the weight of the axle as a brace against the chassis, so that pressure to one side of the motorhome (by weight shift, wind, or passing trucks) is countered by the bar. An RSS anti-sway bar, however, is built to offer significantly more resistance to sway. RSS anti-sway bars have a thicker diameter than stock bars - often, a quarter to three-eighths of an inch more. Each incremental increase in diameter has an exponential effect on performance - on average, torsional roll stiffness is increased by 30 percent with every eighth-of-an-inch increase in diameter. In plain English, RSS anti-sway bars offer up to 90 percent more resistance to sway. A remarkable improvement in stability and cornering control is just a few bolts away. Anti-sway bars from Roadmaster Suspension Solutions deliver a "Wow!" difference in control you'll notice the first time you turn the wheel.