The file 'SKS Mudrocker Rear Frame Adapter For Flat Seatstays 3D Printer Model' is (f3d,stl) file type, size is 289.5KB.
The SKS frame adapter is designed for flat seatstays.
Originaly, the original adapter may not be suitable for modern flat seatstays, which could cause the mudguard to shift its position, especially in wet weather.