[user removed]

My feeling about any non passenger car tire is the vehicle's interaction with the road will more resemble a passenger car. With two passenger car tires on the front I think a motorcycle tire could create unpredictable handling consequences. Without the vehicle leaning in turns, as a motorcycle leans, the specifics of motorcycle tire design would be compromised. I am fairly sure that commercially available tadpole trike designs use passenger car type tires.

I think this thing will handle nicely, the CG is very low but the weight on each wheel will be a fairly small percentage of each tires capacity. That should tend to make it slide versus rolling over. Only time will tell if that assumption is correct, but as of this point in time, I am much more in favor of the passenger car tire, expecially since I have found one that "fills the bill" as far as dimensions and clearance. A significant plus is the height of the tire wheel combo which reduces the overall final drive ratio and should mean fewer tire revs per mile.

regards
Mech