* å±6å¡ stem that fits 1-1/4 inch steerer tubes* Lightweight and stiff with a 1.73g/nm stiffness to weight ratio for better control and responsiveness.* For bikes with 1-1/8 inch steerer tubes, included shims allow stem to be adjusted for å±4å¡ å±6å¡ or å±8å¡ angles.