Help me with technic set 42177

[cricetoDUKE]

I have a question for you , i have a set lego technic 42177 and I search to make it rc with one buwizz 2 and 2 buwizz motor   What reductions of torque you put inside and what wheels hubs you would put considering that it weights 2,2 kg 

[Zerobricks]

Use the 46490 hubs, they will provide the necessary gearing. Also, the differentials have a bit of down gearing too, 1,4 to be exact, so total with the hubs should be around 7,5. That's plenty when powered by 2 BuWizz motors.