RYET 110BCD Chainring 2X 50-54T 7075 Alloy 155g for Shimano 105/Ultegra/Dura-Ace 11-12S Road Bike Aero Bolt Cover SPECIFICATION: BRAND:RYET Size:(Mass +/-5g):34T(24g),36T(32g),40T(41g),42T(469),50T(130g),52T(137g),54T(140g),56T(165g) Color:Black Compatibility: Dura-Ace RD-9100/RD-9120/RD-9150 RD-9170/RD-9200/RD-9250/RD-9270 Ultegra RD-8000/RD-8020/RD-8025 RD-8050/RD-8070/RD-8100/RD-8150/RD-8170 105 Series R7000/R7020/R7025/R7050/R7100/R7120/R7170 BOLTS：For Outer chainring please use our aero Bolt Covers for perfect fit with shimnao cranks arm,inner chainring to use original Material & Finish:CNC machined 7075 Txxx Aluminum.Long-lasting construction.harden anodizing Warranty:1-YEAR PRODCUTS DETAILS: Our driveline ecosystems havebeen engineered to push theboundaries of driveline performancein modern-day road, time trial andtriathlon applications. Utilising the highly-refined tooth andshift ramp profiling, our 2X chainringsoffer exceptional shift quality andperformance, covering maximumusage of the cassette. Made from 7075 T6 aluminium,based on our advanced CAD,CAM and manufacturingcapability,our 2X chainrings are high-performance, highly versatile,robust and hardwearing 2X option,that delivers results Available in the race-specific sizes from50/34 to 56/42t,our 2X chainringsare applicable to race situations thatrequire high-speed, while catering forsignificant elevation gain. Our drivelineecosystems have been developed forand are race-proven in World Tour Olympic and Triathlon competition. MATERIALS: CNC Machined,7075 T6 aluminium Hard anodised black finish Designed,manufactured and finished by lexon in Shenzhen,China COMPATIBILITY: Shimano Dura-Ace R9100 and R9200 Shimano Ultegra R800and R8100,using crank-specific chainring caps/bolts 11 and 12-speed chain compatibility(excluding SRAM Flattop) AERO BOLT COVER: BRAND:RYET Size:13g(4pcs Aero Bolts Cover) Color:Black Compatibility: Dura-Ace RD-9100/RD-9120/RD-9150 RD-9170/RD-9200/RD-9250/RD-9270 Ultegra RD-8000/RD-8020/RD-8025 RD-8050/RD-8070/RD-8100/RD-8150/RD-8170 105 Series R7000/R7020/R7025/R7050/R7100/R7120/R7170 Material:7075 T6 aluminium Finish: type ll anodizing IMPORTANT: Ramps on big rings are specially configured for combinations:50/34,52/36,54/40,52/46T If you wish to use other configuration it will also work, but shifting will be slower and may require more "adjustments of front dérailleur to be acceptable, Also remember that front dérailleur can only accept max 16T difference between 2 chainrings-this is how Shimano and Sram designed them, RYET always recommends using a new chain when fitting

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