GOLDIX Square Hole Bicycle Crankset Aluminum Alloy MTB Crank 165/170/175mm Length Narrow Wide Teeth 104BCD 32/34/36/38/40/42T Brand: GOLDIX Material: aluminum alloy Specification: BCD 64mm / 104mm Compatible: single, double chainring Color: Black Crank: 165mm / 170mm / 175mm Sprocket: 32T / 34T / 36T / 38T / 40T / 42T You can install one disc/two disc/three disc according to your needs, as shown in the example below:

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