The thomson elite x4 stem this is a great all around modern stem to fit 318mm diameter handlebars this mountain bike stem allows you to realize the benefits of stiffer forks and stiffer 318 bars the x4 offers precise steering tracking and more control while riding all wrapped up in a beautiful design thomson stems are the strongest in the industry meaning freeride and downhill riders can run thomson confidently made from a solid one piece 7000 series aluminium extruded billet whi