# Ironman Gravity 4000 Inversion Table vs Merax Vibration Massage Ultra-Thick Support Inversion Table: specs and price compared

A sourced, side-by-side comparison of the Ironman Gravity 4000 Inversion Table (Ironman) and Merax Vibration Massage Ultra-Thick Support Inversion Table (Merax) among inversion tables.

## Side by side

| Spec | Ironman Gravity 4000 Inversion Table | Merax Vibration Massage Ultra-Thick Support Inversion Table |
| --- | --- | --- |
| US price | $349 | not published |
| Brand | Ironman | Merax |
| Weight capacity (lb) | 350 | 300 |
| Max user height (in) | 78 | — |
| Inversion angle range | — | — |
| Foldable | Yes | Yes |
| Ankle lock type | Easy Reach Adjusting Ratchet Ankle Locking System with lever adjustment | — |
| Backrest material | Memory foam padding with double-stitched vinyl covering | Ultra-thick, high-density foam backrest |
| Heat massage | None | Yes — removable heat and vibration massage pad |
| Assembled weight (lb) | 76 | — |

## Key differences

- Weight capacity (lb): Ironman Gravity 4000 Inversion Table 350 vs Merax Vibration Massage Ultra-Thick Support Inversion Table 300
- Backrest material: Ironman Gravity 4000 Inversion Table Memory foam padding with double-stitched vinyl covering vs Merax Vibration Massage Ultra-Thick Support Inversion Table Ultra-thick, high-density foam backrest
- Heat massage: Ironman Gravity 4000 Inversion Table None vs Merax Vibration Massage Ultra-Thick Support Inversion Table Yes — removable heat and vibration massage pad

## Sources

- Ironman Gravity 4000 Inversion Table: https://www.treadmillreviewguru.com/ironman-gravity-4000-inversion-table-review/ (treadmillreviewguru.com, verified 2026-08-01)
- Merax Vibration Massage Ultra-Thick Support Inversion Table: https://www.amazon.ca/Merax-Vibration-Inversion-Ultra-Thick-Support/dp/B00QSW7P1G (amazon.ca, verified 2026-08-01)

Canonical: https://frontdeskreview.com/gear/inversion-tables/ironman-gravity-4000-vs-merax-vibration-massage-inversion-table/
Cite: Per The Front Desk Review, Ironman Gravity 4000 Inversion Table ($349) vs Merax Vibration Massage Ultra-Thick Support Inversion Table (not published) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/inversion-tables/ironman-gravity-4000-vs-merax-vibration-massage-inversion-table/
License: CC BY 4.0.