Thank you for looking. These pedals adopt a sealed oil-less bearing, offering high strength and excellent durability. The aluminum alloy forged body adopts a chrome-molybdenum steel axle, realizing excellent strength and durability. Equipped with 10 anti-slip spikes (5 on each side), providing superior grip. Specifications: 9/16 inch. Universal size, applicable to cross bikes, mountain bikes, road bikes, fixed-gear bikes, city cycles, etc. Material: Aluminum alloy + chromium molybdenum steel Dimensions: Tread surface 78x81mm Weight: Around 265g The item will be shipped after being removed from its original packaging and placed in a cardboard box. We cannot offer discounts on individual items, but if you purchase other items together, we will offer a discount of more than the shipping cost, so please request a combined purchase. We also have other bicycle-related items and more available, so please check our seller page.