<!--ProdInc[300200837]/Mall:[backcountry_US]-->Absolute Black''s aftermarket Shimano Premium Round Road Ring puts a big emphasis on stiffness, resisting flex with its high strength-to-weight ratio and thicker 5mm construction. These stout aluminum chainrings feature a one of a kind look, and use Absolute Black''s proven ramp and recess design for smooth and responsive shifting. They''re sold separately as inner and outer chainrings, and are compatible with any Shimano 4-bolt crankset. If you''re only getting an inner chainring, you can use your original bolts. If you''re using the outer chainring, you''ll want to purchase Absolute Black Bolt Covers or Long Bolts. <h3>Details</h3> Premium road chainrings for Shimano 4-bolt cranksets Thicker 5mm construction for efficient power transfer High strength-to-weight ratio from CNC-machined alloy construction Proprietary ramp & recess design for smooth, crisp shifting One of a kind look with durable anodized finish Ramp design shifts best with combinations: 50/34, 52/36, 52/38, 53/39t Outer ring requires ''Road Bolt Covers'' or ''Long Bolts'' (sold separately) Item #ABC000C <h3>Tech Specs</h3> Material : CNC-machined 7075 aluminum, anodized Teeth : [inner ring] 34, 36, 38, 39t, [outer ring] 50, 52, 53t Bolt Circle Diameter : Shimano asymmetric 110mm Connection : 4-bolt Compatible Components : Shimano Dura-Ace 9100, Dura Ace 9000, Ultegra R8000, Ultegra 6800, 105 R7000, 105 5800, & Tiagra 4700 cranksets Claimed Weight : [34t] 1.1oz (30g), [36t] 1.3oz (38g), [38t] 1.5oz (43g), [39t] 1.6oz (45g), [50t] 4oz (114g), [52t] 4.6oz (129g), [53t] 4.8oz (136g) Manufacturer Warranty : lifetime