5 Hole Chainring: Brand: BUCKLOS Bolt Center Diameter: 110mm BCD Teeth: 34/36/39/50/52/53T Material: Aluminum alloy Color: Black Shape: Round Weight: 138.8g(50-34T)(Different Size Different Weight) Compatible with: 9/10/11 Speed Applicable: For Road Bike Package: 1pc Chainring 4 Hole Chainring: Brand: BUCKLOS Bolt Center Diameter: 110mm BCD Teeth: 34/36/39/50/52/53T Material：AL7075 Aluminum alloy Color: Black Shape: Round Type：Single/Double speed chainring Weight: 34T:About 33.6g 36T:About 39.6g 39T:About 45.8g 50T:About 114.4g 52T:About 123.9g 53T:About 126.8g Compatible with: 10/11/12 Speed Applicable：Road Bike Package: 1pc Chainring Compatible Model：Dura-Ace R9100，Ultegra R8000, 105 R7000，R8000，R9000.
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