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Gearing-Hidden Speed
This aluminum RRP rear sprocket on the left (available through Sprocket Center; 888/265-2141, www.sprocketcenter.com) only weighs five ounces, compared to 20 ounces for the stocker on the right. Note that the stock RC51 chain is only gold-plated on the left side, only where visible; the rest of the chain is unfinished.
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