Chapter 18 Driving Axle 同©大学 TONGII UNIVERSTTY wheel reductor >For heavy duty truck off-road vehicle or large coach,when the ratio is bigger and ground clearance is higher,another Wheel reductor grade reduction is added beside the driving wheels on both sides,which is called wheel reducter; >Hub reduction can be regarded as the second stage transmission of final drive. Final drive >Axle ratio:io=i01X i02 Wheel reductor >Wheel reductor uses planetary transmissionChapter 18 Driving Axle Wheel reductor uses planetary transmission Axle ratio：i0= i01 × i02 wheel reductor For heavy duty truck 、off—road vehicle or large coach，when the ratio is bigger and ground clearance is higher，another grade reduction is added beside the driving wheels on both sides，which is called wheel reducter； Hub reduction can be regarded as the second stage transmission of final drive. Final drive Wheel reductor Wheel reductor