Originally Posted by
Duragrouch
(above) ...
Bonus points for the frame having the rear brake caliper inside the triangle, so it pushes the axle up under braking, and not down like with an aft-mounted caliper. Especially important with QR axles like yours. It really bugs me that bikes are still being sold with aft calipers with QRs, front and rear. Should be thru axles or put the caliper in front of the axle (which Dahon has just demonstrated, with the Curl D9, can be accomplished in front without a special (reversed) caliper, by mounting the caliper to the front of the right fork blade and reversing the wheel to put the disc there as well).
That frame has removeable dropouts, I chose quick release instead of through axle, the frame was designed for either option.
And the frame was designed for either post mount which I have or flat mount disc brake unit. I bought the frame in 2017, flat mount was just coming out at the time. You can see three bolts hold the mount to the chain stay.