SKS X-Blade Dark Rear Fender

Trek Bicycle

Exact black and grey color scheme, including the distinct grey panel, Highly similar robust, curved, single-piece design, Consistent overall form factor and dimensions, Apparent seat post mounting mechanism matches, Material and texture appear identical, Brand SKS is a strong candidate for the unbranded fender in the frame

SKS S-Blade Rear Fender

Grey Ghost Bicycles

Brand (SKS), Product category (bicycle fender), Similar overall design and mounting style

SKS Mudrocker Rear Fender

sks-us.com

Product category (bicycle fender), Brand (SKS is a plausible brand for the item)