Goodyear Polyglas tire

The Polyglas tires had a bias construction that added stabilizing circumference belts directly beneath the tread.

These fiberglass belts surrounded the polyester cord body, thus the Polyglas name for which Goodyear registered a U.S. trademark #859,703.

[3] Goodyear promoted the fiberglass belt design as having less tread "squirm" as the tire rolls on the road surface and improved traction for acceleration and braking.

[6][7] Goodyear and comparable bias-belted tires began appearing as standard or optional equipment on most 1969-model passenger cars[4] and nearly all 1970 through 1974 models.

[12] Television advertisements in 1970 showed that women need Polyglas tires to compensate for their lack of driving ability.