Bontrager's Race XXX Lite Carbon Fork is the lightest, stiffest and best riding fork yet, thanks to its ingenious steerer, which uses the standard 1 1/8-inch diameter at the top combined with a 1 1/2-inch diameter at the bottom where the fork meets the crown. This reduces the stresses placed on the fork, significantly increases strength and saves weight by reducing the amount of carbon required and eliminating the need for additional reinforcement. Trek's oversize E2 head tube adds strength and stiffness. The result is an unbelievably stiff and super-light front end.