OEM tires on the front of a Goldwing Trike just doesn't last long. I put a BT 45 on the front of my Wing with a CSC kit this Spring. It had 7 MM worth of tread at installation. Now, after 9,000 miles on the tire I have 5 1/2 MM left. I mounted it backward after reading everything I could find on the subject. I'm sure I'll get 20,000 or more on the tire.
I get a slight vibration at 70-75 MPH but I don't think it has anything to do with the front tire. I believe you will be happy with the BT 45.