My 3 Wheeler has a Yokohama Blue Earth rear tyre. So far, it seems pretty good and I drove through some heavy rain on the way home from my dealer, Marcassus Sport of Toulouse (a journey of 600km/372 miles). But it's difficult to draw any definite conclusions with the restrictions imposed by the running-in limit.
What other OE rear tyres does Morgan use for the 3 Wheeler and what do you intrepid owners think of them? I recall seeing a Vredestein, my tyre of choice for my sensible car, on the back wheel in a factory photo.