Sunrace BBS15 crankshaft. Color: black / gray Material: Steel Type: BBS15 - Length: 103 mm - Diameter: 31 mm - Axle type: JIS - Weight: 304 grams - Type of thread: BSA - Exclusive crank bolts - Dimensions L1: 103 mm - L2 Size: 74.2 mm - Dimensions L3 12.2 / 17.6 mm