AZ7121320734 Intermediate Axle Main Reducer Assembly for Sinotruk

AZ7121320734 heavy truck STR middle axle main reducer is a mainstream interchangeable spare part for Sinotruk old STR and early Howo trucks. Different from low-precision rough cast reducers from small manufacturers, our product adopts paired gear calibration technology to greatly reduce equipment failure rates and extend service life significantly. It fully matches all standard STR middle drive axle wheel reduction assemblies, and can replace worn original 4.8-speed main reducers directly. Our professional technical team provides parameter verification and step-by-step installation guidance to help overseas buyers cut vehicle maintenance and bulk procurement costs efficiently.

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