The Heavy Load Specialist
• When load wheels and CL-III tires are subject to heavy cargo weight (mostly closer to maximum load of the truck) constantly for a prolonged period of time and excessive heat is generated.
• Heavy cargo loads create flexing of the poly and strain between the poly compound and the bond.
- Just like kneading pizza dough – flexed material heats up. Heat inside the poly will keep accumulating from constant usage (kneading), until reaching the melt down temperature. The polyurethane mass will become liquid and destroyed.
- Under high speeds the bond between poly and steel gets repeatedly stressed. If the bond strength is weak, it can be pulled away from the steel resulting in bond failure.
• Use a higher dynamic compound that generates less heat and has a higher melt down temperature.
• Strengthen the bond and use relatively harder poly to limit material movement in the load wheel.
• Cushothane® XL™ 93A hardness for tires and 97A hardness for load wheels with XL3™ bonding.