On Wednesday, June 12, 2013 10:04:24 AM UTC-4, iBoaterer wrote:

So, you now have a car with 4 times the mass using about the
same tire contact area as the motorcycle.

BS. Cite?

BTW... like many sports and race cars, my old Boxster's rear tires had a lot of camber to allow the tire to have better contact with the road when in a high speed turn. Wears out the inside edge quickly, but increases grip dramatically. That big, flat patch of rubber stays on the pavement.

Bikes can't have flat surfaced tires, so their contact patches are very small all the time.