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.

Cross 2106 Seat Tube C-T Head Angle Seat Angle Top Tube (effective) Chain Stay BB Drop Head Tube Fork Offset Fork Length Stack Reach
52 520 71.5° 74° 530 432 72 110 55 400 551 370
54 540 71.5° 73.5° 540 432 72 130 55 400 570 370
56 560 71.5° 73° 555 432 72 150 55 400 589 374
58 580 72° 73° 575 432 70 170 50 400 609 388
60 600 72° 73° 585 432 70 185 50 400 623 394
62 620 72° 72.5° 595 432 70 200 50 400 638 398
64 640 72° 72.5° 610 432 70 215 50 400 652 404

Chain stay is measured to forward most position.