One more thing to consider might be the fact that the longer, wider radius left turn tends to be taken at higher speeds because you can! The F6B is heavy and at higher cornering speeds exerts a lot of force on the traction point on the tires. Years ago we ran Dunlop K91 tires on a 24 hour race bike at Nelson Ledges. Talk about tire side wear!!! The center looked almost new after over 1700 miles.