Finish Line Shock Oil
Finish Line Shock Oil is a semi-synthetic suspension oil available in 16 oz bottles and five weights (2.5–15wt). Race-proven to deliver consistent damping, low friction and reduced stiction for forks and shocks.
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Product Details
Overview & technology
Key features & benefits
Fit, compatibility & use notes
Who this is for
Key Features
- ✓ Semi-synthetic suspension oil with race-proven performance
- ✓ High viscosity index for consistent damping across temperatures
- ✓ Available in five weights: 2.5, 5, 7.5, 10 and 15wt
- ✓ 16 oz bottle — enough fluid for multiple full services
- ✓ Formulated to reduce stiction and protect bushings and seals
- ✓ Anti-foaming additives for stable, predictable damping behavior
- ✓ Works with most cartridge forks and rear shock damping circuits
Specifications
Product Identifiers
Frequently Asked Questions
Which oil weight should I choose for my fork or shock?
Pick the weight based on your manufacturer's recommendation, rider weight and desired damping feel. Lighter weights (2.5–5wt) give faster rebound and lower drag; heavier weights (7.5–15wt) provide firmer damping and better cold-weather stability. When in doubt, consult your fork/shock manual or a suspension technician.
Can I mix Finish Line Shock Oil with other brands or different weights?
Mixing oils will change damping characteristics and is not ideal for consistency. You can mix weights in a pinch, but for repeatable performance, use the same weight and chemistry recommended by your suspension maker. Avoid mixing with hydraulic brake fluid or incompatible chemistries.
Is this safe for seals and foam rings inside my suspension?
Finish Line Shock Oil is formulated to be seal-compatible for standard suspension materials and includes lubricity agents to reduce wear on bushings and seals. Always check your suspension manufacturer's compatibility notes, and replace foam rings/low-friction components per the service schedule.
How often should I change my fork or shock oil?
Service intervals vary by manufacturer and riding conditions. A general guideline is to perform a lower-leg/top-out service every 50–100 hours of riding and a full damper service every 100–200 hours. Heavy use in muddy or competitive conditions may require more frequent fluid changes.
Can I use this oil in hydraulic brakes or dropper post cartridges?
No. Finish Line Shock Oil is designed for suspension damping circuits only. Do not use it in hydraulic brakes (mineral oil or DOT fluid) or in dropper post hydraulic systems unless the manufacturer explicitly specifies compatible suspension oil.
What is the bottle size and how much does it weigh for shipping?
Each bottle is 16 oz (volume) and the shipping package measures approximately 3.9" x 1.7" x 7.8" with a weight around 1 lb. That volume is convenient for multiple services or shop use.
Buying Guide
When buying suspension oil, match the oil weight to your fork or shock manufacturer's recommendation, consider rider weight and the climate you ride in. Lighter oils reduce drag and speed rebound; heavier oils increase damping and resist thinning in heat or cold. Choose a 16 oz bottle if you do regular DIY servicing or maintain multiple bikes—it's enough for several lower-leg or damper services. Semi-synthetic formulations like Finish Line's balance low-friction performance with thermal stability and anti-foam properties. For consistent, repeatable damping, use the same brand and weight for each service and follow your suspension manufacturer's service intervals.
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