Red Line | HeavyWeight 30WT Suspension Fluid - 16 oz

ed Line HeavyWeight 30WT Suspension Fluid is a synthetic suspension fluid formulated for applications that require a heavier-viscosity shock or fork oil. It is especially well suited for many Harley-Davidson® and American V-Twin motorcycle forks and rear shocks that have not been revalved.

Its advanced formula provides superior shear stability compared with many popular shock oils, allowing more consistent damping performance over time. It also helps reduce shock fade, lowers operating temperatures for the same viscosity versus conventional fluids, minimizes foaming, and provides excellent seal lubricity. Anti-wear additives also help support longer shock life.

Like other Red Line suspension fluids, it can also be blended with other Red Line suspension fluids to create intermediate viscosities for more precise tuning based on suspension setup and rider preference.

Key Features

• Heavy-viscosity synthetic suspension fluid for forks and shocks
• Commonly used in many Harley-Davidson® and American V-Twin applications that have not been revalved
• Provides superior shear stability over many popular shock oils
• Helps reduce shock fade and lower operating temperatures
• Minimizes foaming and improves seal lubrication
• Anti-wear additives help extend shock and suspension component life
• Can be blended with other Red Line suspension fluids for intermediate viscosities

Technical Data

• Viscosity at 100°C: 22.8 cSt
• Viscosity at 40°C: 67.9 cSt
• Viscosity Index: 358
• Pour Point: -40°C / -40°F