I have a 27.5 Norco range sz large a 50 mm stem and am centred good on the bike. i match all my specs over to my new size large 29' range, only difference is the stem is a 40 mm. it descends almost identical, but i notice on the climbs it feels like its pushing my body forwards on my toes as if the frame was a size to small. wondering best way to keep my body back. I don't want to put my cleats forward on my shoes. a bigger stem will pull me forward. should i just push my seat nose angle up a bit an forward? so i don't fall forward......any ideas?