Model: M12 1.0/M12 1.5/M12 1.75/M15 1.0/M15 1.5/M15 1.75. Bicycles Thru Axles Nut M12 M15 P1.0 P1.5 P1.75 Hubs Shaft Cap Bike Accessories. Features: The bicycles wheel nut are made of high-quality aluminum-alloy, which is super durable and not easy to break or deforms.