In 1989, Goodyear began transitioning from bias play to radial tires in NASCAR opposition. None of the present Cup Series drivers have run a bias ply tire in a Cup collection race previously.
Simply because of the grime monitor configuration for this weekend’s race at Bristol (Tenn.) Motor Speedway, groups will be jogging two new Goodyear tire codes this weekend.
Although the tires attribute the same block-fashion tread pattern that the Vehicles ran at Eldora Speedway as lately as 2019, the two the left-facet and suitable-facet tire feature development variations when compared to people tire codes.
Bias ply tire for Cup Collection grime race at Bristol
Photograph by: NASCAR Media
“Bias ply tires are much a lot more compliant than radials simply because they do not have a belt package underneath the tread, creating it extra ready to conform to an uneven filth area,” claimed Greg Stucker, Goodyear’s director of racing.
“The other noticeable variance among these tires and the ones groups operate on Bristol’s concrete area is the existence of a tread pattern. All of our tires have a tread, but the concrete and asphalt tires do not have a tread sample.
“These grime tires have a block-formed pattern, both to bite into the filth and evacuate it so the automobiles have grip.”
The sizing of the left-side tire also has some variances. The left-facet tire is appreciably shorter than common to make in a lot more stagger in between the remaining- and proper-aspect tires.
The tire is based on a filth modified tire in Goodyear Racing’s tire line, although it has been widened out to 11 inches (from 10 inches on the filth modified tire) to give the NASCAR autos and vans extra grip.
Cup teams will get a few sets of tires for apply, one established for their qualifying heat race and five sets for the race (4 race sets plus one particular transferred from qualifying).