2020 Alpha and Ultra series bows come equipped with a refined cam system. Designed specifically for bowhunting, the ZTR cam is the third generation in the ZT cam series and is smoother to draw, has a harder back wall for a rock-solid anchor point and is quieter on the shot. Basically, it’s our smoothest, hardest back wall, quietest cam we’ve ever offered. The ZTR comes in two cam sizes to optimize energy and efficiency and the modular adjustment system makes it easy to dial in your draw length. See the specification page for complete draw length details.