When designed GSX, our objective was obvious that kept the item lighter without sacrificing its function. GSX is especially compatible with narrow-wide chainring (X-RING) to get maximum efficiency, GSX guides chain more smoothly without getting extra unnecessary rolling resistance.
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If you're not completely satisfied with an item you may return it within 12 months of purchase. We'll give you a full refund if the item hasn't been used or the component hasn’t been fitted.More information on returns