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Regular freight transport with standard STAA sized trucks on varying cross country routes. If you're running dedicated routes in fairly flat states, you might prefer 3.25 or 3.36 rears. If you're running dedicated in mountainous terrain, 3.70 or 3.90 rears might suit you better.

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13y ago
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Q: What are 3.55 rears best for in a semi truck?
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