Wikipedia gives the following numbers-
Duke
Rake, Trail- 25°, 100 mm (3.9 in)
Wheelbase- 1,367 mm (53.8 in)
RC 390-
Rake, Trail- 23.5°, 89 mm (3.5 in)
Wheelbase- 1,340 mm (53 in)
I thought both bikes used the same frame, but I'm open to correction. So these dimensional difference are the...