matchy99, Seat tube angles are not always slacker for touring bikes than they are for a race based roadie. My 23" (58.4 cm) Cannondale touring bike has a ST angle of 73.5 degrees. My 58 cm Cannondale roadie has a ST angle of 73.1 degrees. Both are the same year of manufacture.

The ST on a touring bike can be slack because there is plenty of room between the seat tube and the tire because of the longer chain stays on the typical touring bike.

Brad