# RUPES BigFoot LHR21 Mark III Random Orbital Polisher vs Griot's Garage G9 Random Orbital Polisher: specs and price compared

A sourced, side-by-side comparison of the RUPES BigFoot LHR21 Mark III Random Orbital Polisher (RUPES) and Griot's Garage G9 Random Orbital Polisher (Griot's Garage) among car polishers. Griot's Garage G9 Random Orbital Polisher is the cheaper of the two at $179.99.

## Side by side

| Spec | RUPES BigFoot LHR21 Mark III Random Orbital Polisher | Griot's Garage G9 Random Orbital Polisher |
| --- | --- | --- |
| US price | $490 | $179.99 |
| Brand | RUPES | Griot's Garage |
| Released | 2018-11 | — |
| Orbit throw (mm) | 21 | 9 |
| Motor power | 500 W | 1000 W, 8.5 A |
| Speed range opm | 3,000-4,500 | 2,000-6,400 |
| Backing plate size (in) | 6 in | 6 in (converts to 5 in) |
| Variable speed | Yes | Yes |
| Action type | free-spin dual-action (random orbital, not gear-driven) | gear-driven dual-action (forced rotation) |
| Cord length (ft) | 30 | 10 |
| Weight (lb) | 5.95 | — |

## Key differences

- Orbit throw (mm): RUPES BigFoot LHR21 Mark III Random Orbital Polisher 21 vs Griot's Garage G9 Random Orbital Polisher 9
- Motor power: RUPES BigFoot LHR21 Mark III Random Orbital Polisher 500 W vs Griot's Garage G9 Random Orbital Polisher 1000 W, 8.5 A
- Speed range opm: RUPES BigFoot LHR21 Mark III Random Orbital Polisher 3,000-4,500 vs Griot's Garage G9 Random Orbital Polisher 2,000-6,400
- Backing plate size (in): RUPES BigFoot LHR21 Mark III Random Orbital Polisher 6 in vs Griot's Garage G9 Random Orbital Polisher 6 in (converts to 5 in)
- Action type: RUPES BigFoot LHR21 Mark III Random Orbital Polisher free-spin dual-action (random orbital, not gear-driven) vs Griot's Garage G9 Random Orbital Polisher gear-driven dual-action (forced rotation)
- Cord length (ft): RUPES BigFoot LHR21 Mark III Random Orbital Polisher 30 vs Griot's Garage G9 Random Orbital Polisher 10

## Sources

- RUPES BigFoot LHR21 Mark III Random Orbital Polisher: https://www.rupes.com/product/lhr21iii/ (rupes.com, verified 2026-08-01)
- Griot's Garage G9 Random Orbital Polisher: https://www.griotsgarage.com/g9-random-orbital-polisher/ (griotsgarage.com, verified 2026-08-01)

Canonical: https://frontdeskreview.com/gear/car-polishers/rupes-bigfoot-lhr21-mark-iii-vs-griots-garage-g9/
Cite: Per The Front Desk Review, RUPES BigFoot LHR21 Mark III Random Orbital Polisher ($490) vs Griot's Garage G9 Random Orbital Polisher ($179.99) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/car-polishers/rupes-bigfoot-lhr21-mark-iii-vs-griots-garage-g9/
License: CC BY 4.0.