Motorized bike builders, this ZZRSDAN 3-piece wide crank set is exactly what you need for your engine kit projects! The chrome finish looks sharp and provides good corrosion resistance, while the 44T sprocket works perfectly with standard 415 chains. These wide cranks are specifically designed for 4-stroke or pull-start bicycle engine kits - the distance between pedal crank arms is about 26.6cm, giving you the clearance needed for engine installation. They're compatible with standard 9/16 inch pedals, so you can use your existing pedals without issues. The set includes the extended bottom bracket assembly, making installation straightforward if you have the right tools. Quick tip though - if your bike has a 2-inch cup, you'll need a bottom bracket converter to make these work properly. The quality feels solid and the machining is precise, ensuring smooth rotation and reliable performance. Whether you're building a motorized bike from scratch or upgrading your current setup, these wide cranks provide the necessary space for engine components while maintaining proper pedal clearance. The 44T sprocket size offers a good balance between torque and speed for most motorized bike applications. Much better than trying to modify standard cranks that just don't provide enough width for engine kits. If you're tired of clearance issues or want a professional-looking crank set that's actually designed for motorized bicycles, this 3-piece set delivers the functionality and style you need at a very reasonable price point.