Deda ADJ is an adjustable stem that helps you to set up the right position on the bike. ADJ stem is also used by professional Teams mechanics to help riders in valuing riding position on time trial bikes. The stem is that practical tool you can install on your bicycle and ride on the road or track, and fine-tune in the field. It pivots from plus 30 degrees to negative 40 degrees. The stem is forged out of 2014 aluminium and compatible with 31.7mm handlebar diameter. Available in size 90 and 110mm.