Side-by-Side Comparison

See how Probearing stacks up against FK rod ends. This direct comparison covers bearing torque consistency, corrosion resistance, and material strength—so you can see exactly what sets Probearing apart.

🔧 Bearing Torque - Predictable Ride Starts with Tight Tolerances

Probearing rod ends and spherical bearings maintain consistent tightness within their specified tolerance range. In contrast, we found FK products to commonly exceed the upper tightness threshold.

For example, under F1 fit standards, a Probearing 1" uniball consistently falls within a no-load breakaway torque range of 5.5-32.5 N.M. By comparison, FK’s 1" uniballs—also labeled as F1 fit—have shown significant variation, with breakaway torque ranging from 21.5–62.35 N.M.

🌊 Salt Spray Test – 120-Hour Corrosion Exposure

After 120 hours in a salt spray chamber simulating marine-grade corrosion, the visual difference is clear. Probearing’s coating provides noticeably stronger resistance to rust and oxidation.

🔍 Bearing Surface Quality – A Closer Look

Probearing spherical bearings feature a precision-machined radius along the outer edge rather than a chamfer. This design simplifies installation into the uniball cup and helps prevent gouging during assembly.

📊 Strength Comparison: Yield & Tensile

Independent lab testing shows that Probearing spherical bearings have significantly higher yield and tensile strength than FK's. This means Probearing parts are more resistant to deformation under extreme loads—making them ideal for the brutal demands of off-road racing and high-impact applications.

🛠️ Final Thoughts

While both brands have earned recognition in the motorsport world, Probearing continues to rise by delivering superior quality, strength, and reliability.

When performance matters, choose Probearing.