More availability of 150mm stems is a good thing for tandems. A regular stem for the stoker is a big weight savings over an adjustable tandem stem. The option of 150mm would allow more stokers to dc the adjustable stem.
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You could fall off a cliff and die.
You could get lost and die.
You could hit a tree and die.
OR YOU COULD STAY HOME AND FALL OFF THE COUCH AND DIE.