Material:Aluminum Alloy 7075-T6
Color:Black Red Blue Green
Round Weight: 30T-- about 35g;
--Extended edition plus or minus tooth shape, the chain can effect better;
--CNC machining integrated, intensity is more secure, appply for long time cycling;
--The positive tooth corresponding chian tooth width; tooth corresponding negative chain is narow.
--It can help the vehicle reduce 1kg weight.
--Please determine your crank BCD specification carefully before buying.