Which Fast Nerve Fibers Does Nociception Travel?

Which Fast Nerve Fibers Does Nociception Travel? Conduction of noxious information via A delta and C fibers. A delta fibers (group III fibers) are 2-5 mm in diameter, myelinated, have a fast conduction velocity (5-40 meters/sec), and carry information mainly from the nociceptive-mechanical or mechanothermal-specific nociceptors. Which type of nerve fiber will transmit fast pain?