Issue link: https://read.dmtmag.com/i/34500
BRAKE HEAT EVALUATION: MICHELIN ® ® ® ® X ONE TIRES VS DUALS MICHELIN X One tire fitments have greater clearance between the brake drum and the bead of the tire compared to a dual assembly. In addition, due to the 2" outset of the wheel for the MICHELIN X One tires, more brake drum is exposed, which ® provides greater air flow around the drum. These characteristics reduce the heat transfer from the brakes to the tire and allow the brakes to run cooler. ® This effect was demonstrated on a closed course at the Laurens Proving Grounds, Michelin’s 3,000 acre test facility. The Test A 4x2 straight truck outfitted with a temperature logging device was loaded to maximum legal limits and operated on a closed course with almost continuous starting and stopping cycles. The truck was brought up to 30 mph and then stopped repeatedly for 45 minutes. The temperature logging device recorded brake drum and wheel temperatures (in the bead area) every 10 seconds. The test was run on both MICHELIN ® X One tires and duals at similar ® track temperatures and weather conditions. Exposed Brake Drum After 45 minutes, when the brakes were at their peak temperature, the temperatures from the data loggers were compared. The brake drums fitted with MICHELIN X One tires were over 100°F cooler and the wheels were over 30°F cooler in the bead area than when equipped with Duals! ® ® BRAKE TEMPERATURE MICHELIN X ONE TIRES vs DUALS ® ® 700 600 500 400 300 200 100 Dual Michelin X One Tire ® ® 66 Operation and Handling Source: Recent evaluations at a MICHELIN facility in South Carolina. 220 200 180 160 140 120 100 80 WHEEL TEMPERATURE MICHELIN X ONE TIRES vs DUALS ® ® degrees F degrees F