SHIMANO 110BCD R9200 R8100 2X Completely closed Round Road bike Gravel bike 11-12S

Model  48-35T or 50-34T or 52-36T or 53-39T or 54-40T or 56-42T Colour Black Made from 7075-T651 Aluminum Alloy Surface coating Anodizing Made with CNC milling Chainring shape Round Compatible cranksets SHIMANO UT-R8100 D-A R9200 Weight, grams  161 (48-35T), 173 (50-34T), 193 (52-36T), 207 (53-39T), 259 (56-42T) Chain compatibility Standard 11/12 speed  Support paying an extra $10 to customize the same silver color  Bicycle shop or dealer contact customer service              PASS QUEST  Our tooth height achieved 8.5 mm, Increased tooth height improves chain retention  Manufactured using 7075-T651 highly durable aluminum alloy The chamfering design can reduce the weight of the gear plate and make the gear plate more beautiful