Answer:

radials

Answer	Crossword Clue
RADIALS	They may be steel-belted
RADIALS	215-75R14s
RADIALS	A lot may be riding on them

RADIALS	Some tires
RADIALS	Types of tires
RADIALS	Modern tires
RADIALS	Certain tires
RADIALS	Goodyear's Integrity and Invicta GL