Are you the type for "Superzero" or "Superlogic"? Thanks to the multitude of existing handlebar stems and lengths available, finding different gradients and anything from 40mm to considerable lengths up to 140mm stems intended for road bikes, this allows you to set up your bike according to your desired comfort and body metrics. Some of the best producers such as "Deda Elements" and "Ritchey", in their R&D research centre strive to find new and stronger materials making the products lighter and stronger without compensating the safety, thus offering competitive products for either road or MTB uses.