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ALUGEAR Aero 107 BCD Oval Chainring - SilverThe ALUGEAR Aero 107 BCD Oval Chainring is compatible with 107 BCD 4-bolt SRAM cranksets and 11-speed and 12-speed chains. The oval shape works to smooth your pedal stroke and increase traction and power while the aero shape aims to provide aerodynamic advantages.ALUGEAR chainrings are some of the lightest on the market. The chainrings are CNC machined from 7075 T6 aluminum and hard coat industrially anodized to provide protection from mechanical impacts. They also feature a unique design that improves the look of any bike! CompatibilityCrankset: Compatible with SRAM Force and RED 107 BCD cranksets. Not compatible with Rival 107 BCD cranksets.Chain: Compatible with 11-speed and 12-speed Shimano, SRAM and KMC (not compatible with Campagnolo groupsets) SpecsColors: SilverBCD: 107Material: Aluminum 7075-T6Made: CNC millingTiming: 108° (top dead center)Ovality: 12%Surface coating: AnodizingWeight: 38T - 71 grams | 40T - 79 grams | 42T - 86 grams | 44T - 94 grams | 46T - 102 grams | 48T - 109 grams | 50T - 117 grams Why Buy from Power Meter City1. We ship fast! All orders ship on the same day your order is placed!2. Free shipping on all orders in the U.S.3. We are an authorized ALUGEAR dealer and this product comes with a full warranty.4. Expert advice and customer service in case you need any help.5. We offer a free, 30-day return policy on new items. About our CompanyAt Power Meter City, we focus on power meters and related accessories and components. Our focus on these products means we can offer you the best possible selection, advice and service.We have been in business since 2016 and are based in southern California. We are an authorized dealer of every product we sell.