Power Rack Hole Spacing Explained
Standard 2", Westside, full 1", and 3" patterns — what they mean for dual-pin Voltra Mounts, and where to measure vs buy.
Hole spacing is the center-to-center distance between holes up your rack upright. It decides how finely you can set J-cups and safeties — and whether a dual-pin Voltra Mount will land in two holes at once.
This page covers the patterns you will actually see (standard 2", Westside, full 1", and 3") and what they mean for Voltra Mounts. The best and most accurate method of using a tape or calipers on the upright stays on our Measure guide. The buy checklist stays on Fit.
Voltra Mounts is an independent, privately owned company with no affiliation or connection with Beyond Power or its parent company. Our Mounts are built for the Beyond Power VOLTRA I for individuals using various manufacturers’ 3×3 power racks.
The mounting hole patterns you’ll actually see
This page covers the hole patterns you’ll see most often on popular racks. It is not every layout ever made. If your upright looks different or you’re unsure, email Support@voltramounts.com — we’re glad to help.
| Name | Spacing | Where it shows up | Why it exists |
|---|---|---|---|
| Standard / 2" on center | 2" (50.8 mm imperial) or ~50 mm on many metric racks, usually the whole upright | Most 1"-hole 3×3 racks (for example Rogue Monster family, many REP PR-5000–style, many Titan Series) — typically; confirm by measuring | Simple and strong; fine for squat and overhead; coarser for precise bench setup |
| Westside | 1" (25 mm) in the bench / press zone, 2" above and below | Most 5/8" prosumer racks (for example Monster Lite / R-series, REP PR-4000, many Titan X-3 and wall mounts) — typically; confirm by measuring | Extra holes where bench J-cups and safeties need finer steps |
| Full 1" / 25 mm | 1" all the way up | Some premium or custom uprights | Max positions; more cost and tube work; uncommon as a default |
| 3" on center | 3" throughout | Some budget 2×2 / older cage-style racks | Cheapest punch pattern; too coarse for precise bench safeties |
What people mean by “1-inch spacing”
Westside is not 1" from the floor to the pull-up bar.
On most racks that advertise Westside spacing, the layout looks like this:
- Upper upright (squat / high J-cups): 2" centers
- Bench / press / rack-pull band (often roughly mid-upright; exact height is brand-dependent): 1" centers
- Lower upright: 2" centers again
So “my rack has Westside” usually means “I have a denser hole band where I bench,” not “every hole on the rack is 1" apart.”
Why the difference matters
Bench and safeties
On a 2" grid, the “perfect” J-cup or safety height for bench often falls between two holes. A 1" Westside band halves that step in the zone where an inch actually changes unrack height and catch position.
Squat / pull-up / high J-cups
Higher on the upright, 2" steps are usually enough. That is why many brands keep 2" outside the bench band instead of drilling 1" the full height.
Dual-pin and other two-hole attachments
A Mount (or spotter arm) with two pins at a fixed ≈2" distance:
- Seats in holes that are ~2" (or ~50–50.8 mm) apart — including the 2" zones on a Westside upright
- On Westside — seats properly on every other hole in the 1" band (skip one between pins = a 2" pair), and on the 2" zones above and below
- Single-pin Mounts do not care about vertical spacing the same way — pin diameter (1" vs 5/8") still matters
Metric vs imperial “2"” (50 mm vs 50.8 mm) is a smaller gap. Voltra dual-pin designs use an elongated hole so both layouts can work when you are in a true ≈2" pattern — confirm the listing. Tube size (imperial 3×3 vs metric ~75 mm) is a different question. See the imperial vs metric / shim notes on the fit checker.
How the big families line up (snapshot only)
This is a shortcut, not a guarantee. Always measure.
| Family (examples) | Hole size (typical) | Spacing (typical) |
|---|---|---|
| Rogue Monster Lite / many R-series | 5/8" | Westside (1" bench band, 2" elsewhere) |
| REP PR-4000–class | 5/8" | Westside bench band |
| Rogue Monster / many 1" 3×3 | 1" | Uniform 2" |
| REP PR-5000–class | 1" | Uniform 2" (per REP’s own comparison guide) |
| Titan X-3–class | 5/8" | Model-dependent — some Westside, some 2" throughout |
| Budget 2×2 cages | Often 1" | 2" or 3" uniform |
A fuller brand matrix is planned later. Until then: measure upright size, hole diameter, and spacing, then use the fit checker.
What this means for Voltra Mounts
Nearly all dual-pin Voltra Mounts use ≈2" spacing (top-edge to top-edge equals center-to-center). The same Mount accommodates metric layout through an elongated hole — confirm on the product page. We do not publish other dual-pin center-to-center figures here.
Practical rules:
- Mount in a 2" zone (a standard upright, or the 2" sections of a Westside upright) → dual-pin ≈2" spacing is designed for that pattern.
- Westside bench band → mount on every other hole (skip one between pins) so you seat a 2" pair. Dual-pin Mounts are designed for that pattern. Or choose a single-pin Mount, or ask via Custom Quotes.
- Pin diameter still comes first — shop 1" Mounts or 5/8" Mounts from your hole size.
- Rogue T-Bar Mounts are 1" single-pin only.
- Drop / Omni / Doubler geometry: choose pin size first, then pick style from the drop, Omni, or Doubler collections.
Push pin not included with Mounts. DIY Dock is optional. Small play on a correct pin size is a shim topic — not a spacing fix. See Shim kit installation.
How to measure hole spacing (quick)
Industry wording is center-to-center. On the tape, the easy landing is top edge of one hole to top edge of the next — the same number as center-to-center for round holes of the same size.
Full walkthrough (tools, dual-pin vs bolt-on, Simple Upright 6" example):
Measure guide — Step 3
FAQ
What is Westside hole spacing?
Westside hole spacing puts holes 1" on center in the bench / clean-pull zone, with 2" spacing above and below on most racks that use the pattern. Rogue and others market this explicitly; it traces to the finer bench-zone layout associated with Westside Barbell. It is not the same as full-height 1" spacing.
What is the difference between standard 2", Westside, full 1", and 3" spacing?
Standard 2" uses the same center-to-center step up most of the upright — common on many 1"-hole racks. Westside densifies to 1" only in the bench band. Full 1" means 1" the whole upright (rare; not what “Westside” usually means). 3" is a coarse budget pattern with fewer useful safety heights.
Is Westside spacing 1 inch all the way up?
Usually no — that is the common misconception. Most Westside racks only use 1" through the bench / clean-pull band. Full-height 1" is a different pattern. How to tell: look for a denser mid-upright band, then measure.
How do I measure hole spacing for a dual-pin Mount?
The tape method lives on our Measure guide: top-edge to top-edge equals center-to-center. Nearly all dual-pin Voltra Mounts use ≈2" spacing and accommodate metric layout via an elongated hole — confirm on the product page. Full steps: Measure Step 3. Buy checklist: Fit.
Does metric 50 mm spacing fit imperial 2" (50.8 mm) dual-pin attachments?
The 0.8 mm pitch difference can add up on multi-hole attachments. Voltra dual-pin Mounts use an elongated hole so metric ~50 mm and imperial 50.8 mm layouts can work when you are in a true ≈2" pattern — confirm the product page. Tube play and shim notes stay on the fit checker. Do not confuse tube size with hole spacing.
Why does hole spacing matter for bench safeties and J-cups vs squat height?
Westside precision matters most mid-upright, where bench unrack and safety height are sensitive to about an inch. High J-cups and lower zones often stay on 2" steps because squat and overhead setups tolerate coarser increments.
How do I know if my rack has Westside spacing?
Look for a stretch of holes packed tighter than the ones above and below (the bench band). Then measure that band and a 2" zone separately. Brand marketing helps; your tape decides.
Will a dual-pin Mount work in the 1" Westside band?
Yes — on Westside, seat in every other hole in the 1" band (skip one between pins) or use the 2" zones above and below. That gives the ≈2" pair dual-pin Mounts need. The elongated hole covers metric ~50 mm vs imperial 50.8 mm — confirm on the product page. Or choose single-pin. Pin diameter still matters. When unsure: Custom Quotes or Support@voltramounts.com.
Do accessories for Westside fit a standard 2" rack?
It depends on the accessory. Single-pin parts that only need hole diameter often cross. Two-pin / dual-pin parts need the vertical pitch to match — a fixed 2" dual-pin expects 2" centers — on Westside that means every other hole in the 1" band (skip one between pins). Always measure.
Next steps
- Measure your rack (upright · hole size · spacing)
- Run the fit checker
- Shop by pin size: 1" Mounts · 5/8" Mounts
- Non-standard tube, wall, or facility → Custom Quotes
- Play on a correct pin size → Shim kit help (shims do not fix wrong spacing or wrong pin diameter)
Non-standard tube? Request a custom quote