Product Description This e*spec Direct Mount Spider by e*thirteen for combining a TQ HPR50 motor with a 104-mm chainring With this e*thirteen e*spec Spider, which you mount directly on your E-Bike with TQ HPR50, you can use a chainring with a 104 mm bolt circle diameter on your E-Bike. It is made from durable aluminum, is lightweight and strong, and suitable for both steel and aluminum chainrings. This way, you save money and have more freedom in choosing your chainring. Guidelines for Replacing E-bike Components:Before you replace components on your E-Bike, please note the guideline for replacing parts on CE-marked e-bikes / pedelecs with pedal assist. Technical Information:Chainline:55 mmMaterial:aluminum (6-series)Compatibility:TQ HPR50 motorchainrings with 104 mm bolt circle diameterFeatures:Spider for using a four-arm 104-mm chainring on an E-Bike with TQ HPR50 motormade of lightweight and strong aluminumincludes chainring boltsManufacturer Number:CR5EPA-100 Contents:1 x 4 x bolts4 x nuts Weight: black: 78 g Manufacturer: Perigeum Development Inc. DBA e*thirteen 1445 Technology Lane STE A9 Petaluma CA 94954 USA support@ethirteen.com Distributor: Cosmic Sports GmbH Leyher Straße 47 90763 Fürth Germany info@cosmicsports.de