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The SPC Performance aluminum axle shims are an economical heavy‑duty solution sold six per box for correcting caster on over‑the‑road trucks and trailers. Offered in multiple sizes with average compression strength and hardness, they provide a cost‑effective way to align axles. When using Z‑blocks or axle spacers, spread the load to prevent shim crushing; specified here as 4" wide, 6.5" long with a 2.5° taper.
SPC Performance AL SHIMS 4X6.5X2.5 deg.(6)
