The service course sl os stem from zipp is a highly adaptable stem it is compatible with the oversized 1 14 steerer tubes used by giant and canyon for the riders using standard 1 18 steerers the stem comes with shims that allow it to be adjusted for 4 6 or 8 degree angles which can be ridden either side up making sure you can set your bars up just the way you like it the stem itself is forged from 7075 aluminium to keep it lightweight and has a 173gnm stiffness to weight ratio or