With the multitude of standards on bikes these days, the “need to know” info on any Black Mountain Cycles frame is simple, proven, and reliable.

MUSA Cross Seat Tube C-T Head Angle Seat Angle Top Tube (Effective) Chain Stay BB Drop Head Tube Fork Offset Fork Length Stack Reach
56 560 72° 73° 560 432 70 135 45 400 575 384
59 590 72° 73° 580 432 70 165 45 400 603 396

At this time, only 56cm and 59cm are available. There is no schedule for a subsequent production run of other sizes.