The Meritor P600 Series Planetary Axles are now available with optional five-planet wheel-ends and can now be configured for use with a central tire inflation systems (CTIS). The optional five-planet wheel-ends allow a 20 percent higher gross combined axle weight rating (GCWR) over the four-planet version and feature integrated cooling technology designed to reduce axle operating temperatures. With a CTIS configuration, drivers can maintain and adjust tire pressure for enhanced performance in varying conditions.