Easton haven stemlike the wheels handlebars and seatposts that share its name the haven stem is an all mountain game changer easton reached into the bag of tricks that theyve spent 30 years building and pulled out a 153g 85mm fully cnc machined alloy stem that features higher stiffness to weight than any mountain stem theyve ever made distributed stress and top lock technologies optimise barstem interface by removing stress risers and eliminating rocking caused by floating face plates