stable gear

NOUN
11 LETTERS · STARTS WITH S

stable gear is a valid 11-letter word worth 13 points in Scrabble and 16 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
S1T1A1B3L1E1G2E1A1R1
1 + 1 + 1 + 3 + 1 + 1 + 0 + 2 + 1 + 1 + 1 =13 PTS
DOUBLE WORD → 26TRIPLE WORD → 39
MEANING

What does stable gear mean?