Material: --Body: Magnesium --Axle: Chrome Molybdenum Steel --Nail: Aluminum Alloy --Pedal Size: 79mm x 105mm Weight:260/Pair 3 Bearings: Sealed Bushing Rotation is very smooth Axle: 9/16" 5 Colors: Black, Red, Gold, Titanium, Blue Can be Applied to: Bicycle, Cross Bike Pedal, Road By, MTB, BMX, Fixed Bike For junior bikes, city bicycles, etc.