The Crank is compatible with single speed chainring, not only high compatibility, but also ultralight, and with high strength axle. <br> The Narrow wide chainring will grip the chain perfectly, prevent chain drops, and they both are made of aluminum alloy, CNC machining. <br> We will ship from our real US warehouses, 0-1 days handling time,2-5 days delivery time, so that you will receive the product quickly. <br> <br> Crank: <br> Brand: BUCKLOS <br> Crank Arm Length: 170mm<br> Material: Aluminum alloy<br> Compatible: 104mm BCD Single chainring <br> Weight: about 550g (Right & Left) <br> Color: black <br> <br> Chainring: <br> Brand: SNAIL <br> Color: Black/Red <br> Size: 32/34/36/38/40/42T <br> Material: Aluminum alloy <br> Thickness: 4mm <br> Shape: Round/Oval <br> Please make sure your crank BCD specification is 104mm BCD before purchasing. <br> <br> US STOCK<br> We have 2 US warehouses, we will ship directly from the US Stock. <br> The product will be expedited freely delivered to you about 2-5 business days that shipped by "USPS/UPS". <br> <br> Package Includes: <br> 1 x Square crank<br> 1 x 104BCD Chainring<br> 4 x Chainring bolts(set) <br> <br> Note: <br> 1. Due to the problem of taking pictures, the products may look slightly different in colour, please refer to the actual object received. <br> 2. If you have any questions, please feel free to contact us, We will respond to you within 24 hours. Have a good shopping! <br>