which is the best combination of a motor and the wheels?
120:1,
25 in*oz, motor (with 31.2mm (1.23in) diameter and 11.2mm wheels)
145 rpm,
5V, 88 mA
or
143:1,
43 in*oz, motor (with 65mm (just under 2-5/8"), by 7.62mm wide(0.3") wheels)
70 rpm,
5V, 57.6 mA
an explanation will be appreciated