Wednesday, May 25, 2011 Fifty Engineers Push Buick Enclave Tires to the Limit
 The tires on the 2011 Buick Enclave luxury crossover went through a lot of abuse to prove their performance, durability and safety before being chosen.
At the General Motors Tire-Wheel Systems Lab on GM’s Milford Proving Ground, a team of more than 50 engineers tested numerous contenders to be Enclave’s original equipment tire.
“Tires are the only contact point you have with the road,” said Tire Engineering Group Manager Dave Cowger. “Your tires influence everything from fuel economy to steering and handling, road noise, and braking. So we beat the heck out of these tires in the lab to make sure they have the right traction, fuel economy, durability and other characteristics.”
Having tires that reduce road noise is important to Enclave’s library-quiet interior, which allows passengers seated in the third row to hear a conversation between first-row occupants without interference. Enclave is the only crossover in its segment equipped with QuietTuning, Buick’s exclusive engineering process to reduce, block and absorb unwanted noise from entering Enclave’s cabin.
Staff from a range of major tire manufacturers joined in the tire abuse. Each tire vying to be chosen for the Enclave went through 25 different lab tests to gauge how well they hold up against simulated real-world abuse. Some tests mimic hitting a curb at low speed or smashing into a pothole. Lab dynamometers with specially grained sandpaper were used to replicate tens of thousands of miles of road wear.
Tires that survive the lab tests graduate to the test track where they are put through further punishment. Of the scores of tires considered for the Enclave, only 19-inch Michelin P255/60R19 and 20-inch Bridgestone P255/55R20 all-season tires made the cut.
Since the Tire-Wheel Systems team was formed in 1968, the group has tested more than 20,000 tire constructions. Buick, as well as Chevrolet, GMC and Cadillac, use Tire Performance Criteria (TPC) markings, which serve as a “seal of approval” for tires that meet or exceed GM’s stringent tire standards. To earn the TPC marking, tires must deliver exceptional results covering traction, handling, noise, endurance, tread wear and other factors.
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