MRR HR3 Wheels on the Acura RL: What You Actually Need for 20, 22, and Beyond

ByKenji Alvarez

The Short Version

Yes, you can run oversized wheels on an Acura RL. The gap between sizes isn’t just cosmetic though — going from 20 to 22 inches introduces a specific brake clearance problem that catches people off guard, and 24 inches is a different project entirely. Here’s what each step actually involves.

What the MRR HR3 Is

The HR3 is a low pressure cast wheel from MRR with a multi-spoke concave face and no rivets. It’s available in 19, 20, and 22-inch diameters with widths ranging from 8.5 to 10.5 inches. Bolt pattern options include 5×120 — what the 2005–2012 Acura RL uses — plus 5×114.3, 5×112, and several others. Finishes run Silver Machine Face and Chrome.

Being a cast wheel matters at larger diameters. Cast aluminum at 22 inches carries real weight, and that unsprung mass affects ride and handling more than a forged equivalent would. Worth knowing before you size up purely for looks.

20-Inch Fitment: Actually Bolt-On

On the 2005–2012 Acura RL (KB1/KC1 chassis), the factory wheel is 17 inches. Moving to a 20×9 in 5×120 with an offset in the +35 to +42 range clears brakes, fenders, and suspension on a stock-height car without drama. Hub bore is 64.1mm — use hub-centric rings if your wheel bore is larger.

The MRR HR3 at 20×9 +35 is a size that works. Lower the car even modestly and you’ll want to double-check offset, because a too-low positive offset on a wide wheel pushes the barrel outward and it will hit the fender lip under full steering lock. At stock height it’s not an issue.

22 Inches: What “Requires Work” Means

This is where the brake clearance problem lives. The 22×9 HR3 in 5×120 +38mm fits the 2006 Acura RL, but the front brakes are large enough that without modification, the wheel barrel contacts them. The fix is a 5mm spacer up front. That’s the single most important thing to sort before running this combo.

Tire selection tightens up at 22 inches too. A common fitment is 245/30/22 — low profile, stiffer ride, and less forgiving of potholes. The wheel well accommodates it, but if the car is lowered you should roll the fenders before driving it. It takes maybe an hour with a baseball bat or a proper fender roller, and it avoids a nasty surprise on a speed bump.

So the real checklist for 22s: right offset (HR3 22×9 +38 confirmed for the 2006 RL), 5mm front spacers, low-profile tire, roll the fenders if lowered. That’s it.

24 Inches: A Different Category of Build

The MRR HR3 line tops out at 22 inches, so 24-inch setups mean a different wheel entirely. People do run 24s on the RL — builds exist and photos are out there — but the modifications escalate. Suspension components typically need clearancing, inner liners get trimmed or fully removed, fender rolling isn’t enough and pulling is usually required, and the offset window narrows considerably.

Sidewall height at 24 inches also becomes a real concern for daily drivability. The numbers work out, but the ride character changes a lot and wheel and tire weight climbs further. Calling this “requires work” sells it short — it’s a committed build decision, not a bolt-on weekend job.

Numbers Worth Writing Down Before You Order

  • 2005–2012 Acura RL bolt pattern: 5×120
  • Hub bore: 64.1mm
  • Factory offset range: roughly +45 to +55mm depending on trim and year
  • 22×9 HR3 at +38mm on the 2006 RL: needs 5mm front spacers for brake clearance
  • MRR HR3 catalog sizes: 19, 20, and 22 inches only — no 24-inch option

If you’re buying used HR3s, verify the offset is stamped or can be confirmed by the seller. The same diameter in two different offsets can be the difference between a clean fit and a car that rubs on every right turn.

Sources


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