That stem is the correct one for single wheel applications like the one in the pic. The 90 degree stem is usually used on dual rear wheel setups so the stem doesn't drag on the brake drum.
Jerry


"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!