I'm running a 170 mm Lyric. Decreasing travel on the front end will do two things I don't want to happen....steepen the seat tube angle and lower the bottom bracket. I've recently settled on running the shock at around 30% sag for a more reasonable set tube angle. But I thinking that reducing head angle by 1° will raise the bb, increase stack, shorten the wheelbase a hair, while giving me a little more reach. I also think this will help me weight the front end of the bike easier and promote faster side to side angulation during tight, fast turns.