RUPES
RUPES BigFoot LHR21 Mark III Random Orbital Polisher
$490
Released 2018-11
Best Car Polishers · head-to-head
RUPES BigFoot LHR21 Mark III Random Orbital Polisher vs Meguiar's MT300 Professional DA Polisher
A sourced, side-by-side comparison. Meguiar's MT300 Professional DA Polisher is cheaper at $286.99. Every spec and price links to its source.
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Meguiar's
Meguiar's MT300 Professional DA Polisher
$286.99Cheaper
Released 2014
Which is better: the RUPES BigFoot LHR21 Mark III Random Orbital Polisher or Meguiar's MT300 Professional DA Polisher?
The Meguiar's MT300 Professional DA Polisher wins 1 of the 1 specs we compare head to head; the other wins 0. The Meguiar's MT300 Professional DA Polisher is the cheaper at $286.99. The Meguiar's MT300 Professional DA Polisher both leads on specs and costs less — the straightforward pick.
See RUPES BigFoot LHR21 Mark III Random Orbital Polisher on Amazon See Meguiar's MT300 Professional DA Polisher on Amazon
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Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec | RUPES BigFoot LHR21 Mark III Random Orbital Polisher | Meguiar's MT300 Professional DA Polisher |
|---|---|---|
| US price | $490 | $286.99 |
| Brand | RUPES | Meguiar's |
| Released | 2018-11 | 2014 |
| Orbit throw (mm) | 21 | 8 |
| Motor power | 500 W | 4.5 A |
| Speed range opm | 3,000-4,500 | 3,000-7,500 |
| Backing plate size (in) | 6 in | 3 in / 5 in / 6 in |
| Variable speed | Yes | Yes |
| Action type | free-spin dual-action (random orbital, not gear-driven) | gear-driven dual-action (forced rotation, Digital Torque Management) |
| Cord length (ft) | 30 | — |
| Weight (lb) | 5.95 | 5.4 |
Sources — RUPES BigFoot LHR21 Mark III Random Orbital Polisher: rupes.com (verified 2026-08-01). Meguiar's MT300 Professional DA Polisher: meguiars.com (verified 2026-08-01).
What's the difference between the RUPES BigFoot LHR21 Mark III Random Orbital Polisher and Meguiar's MT300 Professional DA Polisher?
Where the two actually differ on the specs we track (6 of 8). Matching specs are omitted.
- Orbit throw (mm): RUPES BigFoot LHR21 Mark III Random Orbital Polisher 21 vs Meguiar's MT300 Professional DA Polisher 8
- Motor power: RUPES BigFoot LHR21 Mark III Random Orbital Polisher 500 W vs Meguiar's MT300 Professional DA Polisher 4.5 A
- Speed range opm: RUPES BigFoot LHR21 Mark III Random Orbital Polisher 3,000-4,500 vs Meguiar's MT300 Professional DA Polisher 3,000-7,500
- Backing plate size (in): RUPES BigFoot LHR21 Mark III Random Orbital Polisher 6 in vs Meguiar's MT300 Professional DA Polisher 3 in / 5 in / 6 in
- Action type: RUPES BigFoot LHR21 Mark III Random Orbital Polisher free-spin dual-action (random orbital, not gear-driven) vs Meguiar's MT300 Professional DA Polisher gear-driven dual-action (forced rotation, Digital Torque Management)
- Weight (lb): RUPES BigFoot LHR21 Mark III Random Orbital Polisher 5.95 vs Meguiar's MT300 Professional DA Polisher 5.4