Paceora The full picture
Standing desk pairing depends on three measurements: desk max height, treadmill deck height, and your own height. The A1 Pro and C2 have the lowest profiles. The X21 has a fixed handle that changes the equation — you need to stand beside or behind it, which means the desk relationship is different. The R1 Pro's handles make under-desk placement impossible in walk mode, but the flat configuration works. The X25 is generally too tall for comfortable desk pairing.
The Paceora angle
Standing desk users already live at their Mac. Paceora means the treadmill becomes part of the desk workflow — no phone needed, no context switch required.