4 bolt, 110BCD, support 9, 10, 11 speeds. Size: 110BCD. 5 types for you to choose, 36T, 38T, 40T, 42T, 44T. Narrow wide tooth chainring, less chance of dropping the chain. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.
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