"Uh-uh. Respek Knuckles."
Join Date: Jun 2005
Bikes: '06 LeMond Versailles, '04 S&M Beringer, '03 Quamen Bowls, '68 Raleigh Grand Prix (converted to fixed gear)
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Get a quality sprocket. Cheap ones often aren't round, which causes your chain to tighten and become slack as you pedal, resulting in dropped chains and wear on your drivetrain.
That said, as long as you're buying top-shelf stuff, one's pretty much as good as the next and the rest is aesthetics / brand loyalty.