RUPES BigFoot LHR15 Mark V Review: The One Polisher to Own
Our Verdict
The fifth generation of the machine that invented long-throw polishing is the smoothest, quietest and most refined DA you can buy. A 15 mm orbit on a 5-inch plate corrects a full car without a second machine, and the Mark V's composite gears cut vibration to almost nothing. It costs what it costs, and every hour you spend behind it explains why.
RUPES made long-throw polishing mainstream with the original LHR15 BigFoot, and every generation since has refined the same idea: a 15 mm orbit that moves the pad far enough per rotation to cut like a bigger machine while staying compact enough to work a bumper. The Mark V is the most thorough revision yet, and the first one where the improvements are felt in your hands rather than read in a spec sheet.
What changed in Mark V
The gears are now a POLYSYNTHEC composite instead of metal, which is the source of the two things every owner mentions: it is dramatically quieter, and the vibration that fatigues your hands over a full correction is mostly gone. The body is more compact, the motor cooling is better, an anti-spin ring reduces stress on pads, and the PrecisionPro backing plate has a rubber edge that stops the plate from marring trim when you get close. None of it changes what the machine does. All of it changes how it feels doing it.
Correction
With a microfiber cutting pad and M105 it removes moderate to heavy defects on hard clear coats faster than any 8 mm DA. With a finishing pad and BOSS Perfecting Cream it jewels soft paint with no haze. The progressive trigger lets you start slow on an edge, and the speed dial holds RPM under pressure. The 5-inch plate fits doors, pillars and most bumper sections; for mirror caps and the tightest curves you still want the LHR75E Mini.
Where it stops
Long-throw physics. Press hard on a convex curve and the pad stalls, like every 15 mm and 21 mm machine. Lighter pressure and a smaller pad solve it, and the Mark V stalls less than earlier BigFoots, but it is not a forced-rotation FLEX XCE. And it is tool-only: budget for pads, and a lot of them.
Who should buy it
Anyone stepping up from a TORQX who intends to keep polishing cars for years, and anyone who wants one machine that does most of a car alone. Beginners should read our DA polisher guide first; this is the machine you graduate to.
Pros
- 15 mm throw corrects a full car quickly
- Lowest vibration of any long-throw DA
- Progressive trigger and precise speed dial
- Rubber-edged backing plate protects trim
Cons
- Tool only; pads and compounds add real cost
- Stalls on tight curves like every long-throw
- Priced for professionals