The Cab flangeless front hub features a 6061 aluminum 36 hole hub shell designed to be laced with a heads in pattern, precision sealed bearings, a chromoly female center axle, chromoly 3/8" bolts and chromoly bearing sleeve, 7075 alloy press-fit collars and includes integrated nylon hub guards to protect the spokes from grind damage. Axle: 3/8x24tpi Female Bolts. Bearing Size: 2x 6902. Weight: 363g / 12.8oz.