Custom rear dropouts for my SC Alien frame) Several years of thinking ideas, design, drawing, stress calculations... And finally, milling, black anodizing (after this photo) - and, voila, the rear axle becomes screwed into the dropouts (through the hole of the lower bolt from the stock dropouts) and the frame chainstay decreases from 406 to 386 mm !!! -1.5mm BB height. In addition, got rid of the brake adapter and made a direct mount 140 PM.