B:rear hub motor is 135mm,front hub motor is 100mm
2.A:How much wheel size you need?
B:PLese tell us wheel size you need,because differernt wheel size,differernt freight cost.
We use 1.75-2.125 rim.If snow hub motor and big power hub motor for fat bike,use 4.0 rim.
You can choose single rim or doube rim.
B:You can choose normal or waterproof cables,waterproof cables need to pay addtional charges.
B:If you buy battery from other suppliers,please note battery conntector to connected with controller.
B: 25km/h,if you want to other speed,if possible for hub motor,it is ok according your requirements.
B:One sample is possible,you can try to test quality.100% payment before sample production.
7.A:choose motor specifications?
B:please tell us voltage/power/speed/wheel size/colour for hub motor,spoke,rim/front or rear;
We will recommend suitable hub motors for you.
B:it is possible.