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The SPC zinc alloy axle shims are offered six per box as a fast, accurate way to align front or rear axles on tandem trailers and heavy‑duty trucks. Zinc alloy brings improved compression strength and greater hardness than aluminum at a small cost increase. When using Z‑blocks or spacers distribute load to prevent crushing; this version lists 3.5" width, 6.25" length with a 0.5° taper.
SPC Performance ZINC SHIMS 3.5x6.25x0.5 deg.
