SPC Performance 10413 Zinc Shims 2.5x5x1.0 (6)

The SPC Performance 10413 zinc alloy axle shims provide a fast, accurate solution for aligning the front or rear axles of most tandem trailers and heavy-duty over-the-road trucks. Each pack contains six shims, sized at 2.5" wide × 5" long × 1.0° taper angle, making them a practical choice for professional alignment technicians and fleet maintenance crews.

Why Zinc Alloy?

SPC Performance engineered these shims from a zinc alloy to deliver a meaningful upgrade over traditional aluminum shims. The zinc alloy material provides hardness comparable to SPC's premium manganese bronze shims while significantly improving compression strength versus aluminum — all at a competitive price point.

Key Features:

• Material: Zinc alloy construction for superior hardness and compression strength
• Size: 2.5" spring width × 5" length × 1.0° taper
• Application: Front or rear axle alignment on most tandem trailers and heavy-duty trucks
• Pack Quantity: Six (6) shims included per box
• Performance Advantage: Improved compression strength over aluminum; hardness approaching manganese bronze
• Manufacturer: SPC Performance (Specialty Products Company) — industry leader in alignment parts since 1972

Whether you're correcting axle thrust angle or fine-tuning caster on a heavy commercial vehicle, the SPC Performance 10413 zinc shims deliver reliable, long-lasting alignment correction with professional-grade materials.