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8-Spline 3-piece Crankset
Sealed bearing MID BB set w/ American BB alloy cupsLightweight 4130 chromoly crankarms Chromoly 8-spline axle RHD and LHD Weight (175mm Mid BB model): 40 oz. (1140g) Black or White Powder coat finish 
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4D8 2.5pc Crankset
Lightweight tapered 4130 chromoly crankarmsButted 1.6/1.4mm tubing Hollow 19mm 4140 chromoly 48-spline spindle Forged and CNC machined sprocket interface Conical bolt heads and washers RHD and LHD Weight (175mm): 28.4 oz. (807g) Colors: Black, Pearl White, Candy Red and Monster Green
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