Finish Line's Shock Oil is a premium suspension fluid specifically formulated for oil-damped bicycle forks. It is 100% compatible with all suspension designs and seals.

This semi-synthetic mineral oil formulation has become the choice of professionals worldwide. It does not thicken or thin due to temperature fluctuations. The low-foam technology ensures consistent and predictable damping under all riding conditions.

Race-tested for outstanding performance in all suspension systems. A high viscosity index provides consistent damping under the longest and most extreme riding conditions. 16oz bottles are available in five different oil weights: 2.5wt, 5wt, 7.5wt, 10wt, and 15wt.

Customize your fork performance by choosing the oil fill and weight: you can accelerate or decelerate the compression and rebound characteristics of your fork by changing the oil viscosity. 2.5wt is lighter, thinner, and faster. 15wt is heavier, thicker, and slower. If you are light and small, choose thinner oil; if you are larger and heavier, choose thicker oil. Additionally, you can adjust the oil height and fill volume in your fork to make the spring rate more linear and consistent or more progressive and increasing as it approaches the end of the compression stroke.