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The SPC Performance aluminum axle shims are a low‑cost heavy‑duty option sold six per box for correcting caster on over‑the‑road trucks and trailers. With average compression strength and hardness, these shims come in many sizes to suit spring pad dimensions. When using Z‑blocks or axle spacers, spread the load to prevent crushing; this entry lists 3.5" width, 6.25" length and a 3.0° taper.
SPC Performance AL SHIMS 3.5X6.25X3 deg.(6)
