The elite x4 zero degree stem is absolutely the best combination of strength and weight available enduro and downhill riders can run thomson confidently yet x4 is light enough for cross country and cyclocross x4 offers precise steering and tracking for the ultimate in control while riding the thomson x4 stem gives you the benefits of stiffer forks and stiffer 318 bars as it is machined from 1 solid piece of 7000 series aluminium the x4 also offers precise steering tracking and more cont