A twin rear wheel trike usually only has the pedal drive to one rear wheel due to the costs of providing a differential, and with the weight carried on two rear wheels traction can be lost in slippery conditions like ice or against obstruction like snow.
E-power is usually only practical by adding a front hub motor, and with little weight on the front wheel of a three wheeler, traction can again be a problem.
This doesn't apply so much to a "tadpole" trike like that piotrmacheta has above, with adequate weight on the single rear wheel for both pedal and motor traction. Best of all are the Russian tadpole trikes with both front wheels or even all three wheels driven like the one below, what we might expect from a nation to whom snow is the norm:
E-power is usually only practical by adding a front hub motor, and with little weight on the front wheel of a three wheeler, traction can again be a problem.
This doesn't apply so much to a "tadpole" trike like that piotrmacheta has above, with adequate weight on the single rear wheel for both pedal and motor traction. Best of all are the Russian tadpole trikes with both front wheels or even all three wheels driven like the one below, what we might expect from a nation to whom snow is the norm:
