Super73-ZX Review: Stylish Urban Pedal-Assist E-Bike。SUPER73-ZX SE | Legacy Series。Super73-ZX – American Iron Cycles。Super73-ZX Review: Stylish Urban Pedal-Assist E-Bike。I have a Cross/ Mountain bike which I bought in November last year but used it very rarely. Currently it is just standing in the bicycle parking and I use it once a week to buy groceries. I feel that someone else could use it much more than me. I am ready to bring the bicycle anywhere in Itabashi but preferably in Takashimadaira.Features :1. Mechanical Disc brake (front and back both)2. 21 Gears (7x3)3. Front suspension4. Steel rim & Aluminum body5. 26\" Tyre6. Color : Black & Green7. Lock (free)