WASHINGTON-Escalating raw materials costs, which raised tread rubber prices 6.7 percent in November, also brought less dramatic increases to the wholesale prices of most tires, according to the most recent report from the federal Bureau of Labor Statistics. For the first 11 months of 1994, tread rubber prices were up 10.2 percent. Those of tires and tubes were up 1.3 percent.
For November, medium and heavy truck tires had the biggest increase in wholesale prices at 2.9 percent, followed by all-season passenger tires with a 1.7-percent increase.
Prices of all types of passenger tires were up 0.5 percent in November, while those of truck/bus tires (including off-highway) rose 1.2 percent. Figures were not available for light truck tires.
The only categories showing decreases were those of ``other pneumatic and all solid tires,'' where prices declined 0.9 percent, and ``industrial and highway solid tires,'' which dropped 0.3 percent.