BBB has all the best tools and accessories for your bike. This BBB Stem Adjusteable 31.8 HighSix Adjustable Stem is made of 3D forged 6061-T6 Aluminium and it offers an extension of 110mm and an adjustable angle of inclination ranging from -30° to 40° which can adapt your bars quickly and easily to your personal needs and preferences. For oversized trekking handlebars. High angle for comfortable riding and improved steering control. Lowangle for speed and reduced wind resistance.Stainless steel bolts.