Reference
Rack upright sizes: 2x2, 2x3, 3x3 and metric tubing compared
Pick an upright size to see the hole diameters and spacing it comes with, how to measure your own rack, and the attachments made for it.
- 2x2 in uprights
- 2x3 in uprights
- 3x3 in uprights
- 60 mm uprights
- 75 mm uprights
Choose your upright size to see the key facts and what fits. Each fact links to its source on the full page.
All upright sizes
- 2x2 in uprights 2x2 in uprights work out to 50.8 mm, not 50 mm. Hole sizes and spacing makers list for the REP PR-1000, PR-1100 and Titan T-2, and parts sold in 2x2.5 products that fit
- 2x3 in uprights 2x3 in uprights are rectangular, 50.8 x 76.2 mm by calculation. Rogue Infinity, Titan T-3 and PRx Profile ONE use them, with different hole and pin sizes.6 products that fit
- 3x3 in uprights 3x3 in uprights work out to 76.2 mm, 1.2 mm larger per side than 75 mm. They come with 5/8 in or 1 in hardware; the systems in each class and parts sold for them.5 products that fit
- 60 mm uprights A 60 mm upright is about 2.362 in. Bells of Steel labels it 2.3 in, Force USA 2.4 in, and neither label shows that parts cross between the two brands.
- 75 mm uprights A 75 mm upright is 1.2 mm smaller per side than a 3x3 in upright. A 2020-era REP FAQ describes 75 x 75 mm REP racks; REP's rack guide says 3x3 in.