firing tread

12 LETTERS · STARTS WITH F

firing tread is a valid 12-letter word worth 16 points in Scrabble and 18 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

F4I1R1I1N1G2T1R1E1A1D2

4 + 1 + 1 + 1 + 1 + 2 + 0 + 1 + 1 + 1 + 1 + 2 =16 PTS

DOUBLE WORD → 32TRIPLE WORD → 48

MEANING

What does firing tread mean?