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ROTOR 110x4 Chainrings - OvalThe ROTOR 110x4 Chainrings are machine CNC’d from ultralight aeronautic-grade 7055 aluminum. The result is great looking, stiff chainrings that feature clean shifting.This chainring is compatible with Shimano road cranksets as well as with ROTOR modular cranks and power meters. This includes the 2INpower, INpower, INspider, ALHDU, and VEGAST cranksets. It is compatible with 9-, 10-, 11-, 12-, and 13-speed groupsets.The direct mount spider, required for use with ROTOR cranks, features a spline interface that mounts directly to the axle. The spider also includes refined OCP Mount technology so you can adjust your chainring position in one-degree increments. OptionsThe ROTOR 110x4 Chainrings are available in the following sizes:Size: 53/39 | 52/36 | 50/34 | 53T | 52T | 50T | 39T | 36T | 34T The ROTOR ALDHU Direct Mount Spider is required for use with the 2INpower, INpower, ALDHU or VEGAST cranksets (not required for use with the INspider). CompatibilityWith ALDHU Spider: Compatible with ROTOR’s 2INpower and INpower DM power meters as well as ALDHU and VEGAST cranksetsWithout ALDHU Spider: Compatible with most 110x4 cranks (does not fit Shimano R8100/9200 cranksets)Compatible with 9-, 10-, 11-, 12- and 13-speed drivetrainsNot compatible with SRAM AXS 12-speed groups Technical SpecificationsColor: Black anodizedBCD: 110x4100% CNC-machined, 7075 aluminum alloyOCP Mount technology: Fine adjustment for OCP positions 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 ROTOR 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.