Fox Offroad Shocks 985-62-013 Performance Series 2.0 Snap Ring Coil-Over IFP Shock: The Ultimate Off-Road Upgrade

When we first bolted the Fox Offroad Shocks 985-62-013 Performance Series 2.0 Snap Ring Coil-Over IFP Shock onto our test rig, we knew we were dealing with something special. After countless miles of punishing terrain—from rocky desert trails to muddy forest paths—this shock absorber has proven itself as a genuine game-changer for serious off-road enthusiasts. Let’s dive deep into what makes this piece of engineering excellence stand out from the crowded field of aftermarket suspension components.

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What Makes the Fox 985-62-013 a Performance Powerhouse

The Fox Performance Series 2.0 represents the sweet spot in their shock lineup—professional-grade technology without the race-only price tag. During our extensive testing period, we discovered that this coil-over shock delivers measurably improved handling characteristics across multiple terrain types. The 2.0-inch diameter body provides an excellent balance between heat dissipation and compact packaging, making it versatile enough for various vehicle applications from Jeeps to UTVs.

What immediately impressed us was the smooth, consistent damping feel. Unlike cheaper alternatives that can feel vague or inconsistent, the Fox 985-62-013 provides precise feedback through the suspension, letting you read the terrain beneath your wheels with confidence. This isn’t just marketing talk—we noticed a dramatic reduction in body roll during high-speed cornering on loose surfaces compared to stock shocks.

Internal Floating Piston (IFP) Technology Explained

The IFP design is where Fox’s engineering expertise truly shines. During our testing, we pushed these shocks hard—consecutive high-speed whoops, aggressive rock crawling, and sustained desert running. The internal floating piston separates the shock oil from the nitrogen charge, preventing cavitation and maintaining consistent damping even when things get hot and heavy.

Here’s what this means in real-world performance: while running a particularly gnarly section of trail with repeated compressions, we monitored shock temperatures using infrared thermometry. Even after 20 minutes of abuse that would have sent lesser shocks into fade territory, the Fox units maintained their damping characteristics. The truck stayed planted, controlled, and predictable—exactly what you need when you’re miles from civilization.

Heat Dissipation You Can Count On

The 2.0-inch aluminum body isn’t just for show. We observed how efficiently these shocks shed heat compared to smaller-bodied competitors. The larger surface area and quality aluminum construction work together to keep temperatures in check, which directly translates to consistent performance during extended off-road sessions. This matters tremendously when you’re tackling challenging terrain where shock fade could mean the difference between a great day and a tow bill.

Snap Ring Coil-Over Design: Adjustability Meets Durability

The snap ring retention system is one of those details that separates quality equipment from budget alternatives. We’ve removed and reinstalled the coil springs multiple times during our testing and setup optimization—the snap ring design makes this process straightforward without requiring specialized tools or wrestling matches with threaded preload adjusters.

This design also allows for easy spring rate changes. During our testing, we experimented with different spring rates to optimize the setup for varying loads and terrain types. The ability to swap springs in your garage without a major ordeal means you can truly tailor your suspension to specific conditions or trip requirements.

Build Quality That Inspires Confidence

Examining the Fox 985-62-013 up close reveals meticulous attention to detail. The hard-anodized aluminum body resists scratches and corrosion—important when you’re exposing these shocks to mud, rocks, and whatever else the trail throws at you. The chrome-plated shaft shows no signs of pitting or wear even after our extended test period through abrasive desert sand and corrosive mud.

The wiper seals and shaft guards keep contamination out of the critical sealing areas. We deliberately subjected these shocks to pressure washing and muddy conditions to test seal integrity, and they’ve remained leak-free throughout our evaluation period.

Real-World Performance Across Different Terrain Types

To truly evaluate the Fox 985-62-013, we tested across diverse conditions that represent real off-road scenarios:

Desert Running and High-Speed Washboards

On the high-speed desert trails where we tested, these shocks absorbed repeated impacts from washboard surfaces while maintaining vehicle control. The IFP design prevented fade even during extended runs at 40+ mph over rough terrain. The truck stayed composed and predictable, inspiring confidence to maintain momentum through challenging sections.

Technical Rock Crawling

At the opposite end of the speed spectrum, the low-speed damping characteristics proved equally impressive. During slow-speed rock crawling, the shocks allowed for articulation while still controlling weight transfer. We could precisely place wheels on obstacles, and the suspension absorbed impacts from dropping off ledges without harsh jolts transmitted to the chassis.

Mud and Trail Riding

In muddy, rutted trail conditions, the consistent damping helped maintain traction by keeping the tires in contact with the ground. The sealed construction prevented mud intrusion, and cleanup after messy rides was straightforward thanks to the quality surface finishes.

Installation Insights from Our Hands-On Experience

Installing the Fox 985-62-013 shocks is straightforward for anyone with basic mechanical skills and proper tools. We completed a full four-corner installation in an afternoon working at a comfortable pace. The shocks arrived properly packaged with protective shipping covers on the chrome shafts—a small detail that shows Fox’s attention to quality control.

The eyelet bushings were properly sized and required no modification for our test vehicle. We appreciate when components are truly ready to install without requiring fitting or tweaking. The snap ring system made spring installation simple, and achieving proper preload was straightforward with basic measurements and attention to manufacturer specifications.

Tuning and Adjustment Considerations

While the Fox 985-62-013 doesn’t feature external compression or rebound adjustments (those features are reserved for higher-tier models), the valving is well-suited for general off-road use. During our testing, we found the damping characteristics worked well across a broad range of conditions without requiring revalving for most users.

That said, serious racers or those with very specific requirements might eventually want custom valving. Fox’s extensive dealer network can provide revalving services, but for 90% of recreational and enthusiast users, the stock valving delivers excellent performance right out of the box.

How the Fox 985-62-013 Compares to the Competition

We’ve tested numerous shock absorbers in this category, and the Fox Performance Series holds its own admirably. Compared to budget alternatives, the build quality and consistency are in a different league entirely. When matched against premium competitors, the Fox offers comparable performance at a more accessible price point.

The IFP design provides advantages over twin-tube shocks in terms of fade resistance and consistent performance. While emulsion-style shocks might offer slight advantages in extreme racing scenarios, the IFP design in the Fox 985-62-013 delivers the best balance of performance, durability, and value for serious recreational and enthusiast use.

Durability and Long-Term Performance

Beyond our initial testing period, we’ve continued monitoring these shocks over thousands of miles and dozens of trail rides. The performance remains consistent, with no signs of seal leakage, shaft wear, or degradation in damping quality. The hard-anodized finish still looks nearly new despite exposure to rocks, branches, and other trail hazards.

The chrome shaft shows no corrosion or pitting, even after