The Simian is the predecessor to g-sports popular marmoset hub. Lightweight and strong front hub designed for street use. 7075 aluminum shell with angled flanges to prevent bending and oversized bearings. 20mm aluminum axle (fits 10mm dropouts) with helicoiled threads to prevent threading and 3/8 grade 8 bolts. Axle: 3/8x24tpi Female Bolts. Bearing Size: 2x 6804. Weight: 266g / 10.5oz. ###section### Product Specs AXLE SIZE: Female SPOKE HOLES: [PRODUCT_PROPERTY_SPOKE HOLES}] BEARINGS: Sealed WEIGHT: 266g / 10.5oz