The 15027-S is designed for high-stress racing environments where aluminum shafts might be prone to deflection. By utilizing a steel shaft in conjunction with spherical bearings (rather than traditional bushings), the A-arm is allowed to pivot with zero resistance. This ensures that your shock and spring handle 100% of the suspension loads without being "masked" by the friction of a binding pivot.
Detailed Technical Specifications
1. High-Tensile Steel Construction
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Maximum Rigidity: Unlike aluminum counterparts, this steel shaft resists flexing under the extreme lateral G-loads of asphalt or high-bite dirt tracks.
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Impact Resistance: Steel provides a higher safety margin during wheel-to-wheel contact or heavy curb strikes, ensuring the A-arm remains securely attached to the chassis.
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Precision Ground Finish: The shaft is machined to exact tolerances to provide a perfect press-fit or slip-fit with the inner race of the spherical bearings.
2. Bearing-Specific Architecture
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Zero-Bind Performance: Specifically engineered to work with spherical bearings. This removes the "memory" and resistance found in rubber or poly bushings, allowing the suspension to react instantly to the track surface.
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Improved Tuning Clarity: Because the pivot is friction-free, changes to shock valving or spring rates become much more noticeable and effective.
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Centered Alignment: Machined to provide the correct spacing for standard chassis mounts, ensuring your caster and camber settings remain locked in place.
3. Serviceability & Maintenance
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"Shaft Only" Convenience: This part allows teams to refresh their suspension after a collision or long season without having to purchase a complete new A-arm assembly.
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Durable Coating: Typically finished with a protective layer to prevent rust and corrosion, ensuring the bearings can be easily serviced or replaced.
