Bbb highsix adjustable stem the bbb highsix adjustable stem has the option to be set at a high angle for comfortable riding and improved steering control or a low angle for speed and reduced wind resistant complete with a 3d forged 6061 t6 aluminium and stainless steel bolts ideal for standard trekking handlebars adjustable stem high or low angle option 3d forged 6061 t6 aluminium stainless steel bolts for standard trekking handlebars bbb branding black