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The SPC Performance aluminum axle shims are economical heavy‑duty alignment shims sold six per box for correcting caster on over‑the‑road trucks and trailers. Offered in a variety of sizes with average compression strength and hardness, they let technicians cost‑effectively restore alignment. When using Z‑blocks or axle spacers spread load to prevent crushing; this version is 4" wide, 6.5" long with a 4.0° taper.
SPC Performance AL SHIMS 4X6.5X4 deg.(6)
