The DAYCO 1.1" x 57.5" poly rib heavy duty v-ribbed belt for Kenworth / Mack is engineered to withstand harsh conditions, offering dependable performance under stress. Constructed to resist high temperatures, it ensures a longer lifespan. This v-ribbed belt is built to handle significant power transmission without stretching. Its ribbed design enhances the contact area, providing better traction during operation. Additionally, it maintains tension and alignment, which significantly reduces the need for frequent maintenance for heavy duty applications.