Made from forged and shot peened aluminum, this stem boasts exceptional resistance to fatigue while balancing weight and cost so you'll have cash left over to finish the build. A four-bolt clamp face helps distribute clamping pressure across a wider area than a two-bolt design, which reduces stress on your bar and increases overall durability. Approxi. weight: 240g. A light and strong aluminum stem, angle adjustable from 0-60 degrees. Compatible with 31.8mm (1-1/4in) bar diameter, 28.6mm (1-1/8in) steerer tubes. Place your handlebars high for upright, easy-riding comfort, or go low for a more forward, aggressive position.