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Ironman
Ironman Iron RB 12 NWS 225/70R15
Ironman Iron RB 12 NWS 225/70R15
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The Ironman RB 12 NWS in 225/70R15 ships free from ThreePiece.us, with Affirm financing available at checkout and fast delivery from a nationwide warehouse network.
What 225/70R15 means
In the size 225/70R15, 225 is the section width in millimeters (8.86 in), 70 is the aspect ratio — the sidewall stands 70% as tall as the tire is wide, or 157.5 mm (6.20 in) — R denotes radial construction, and 15 is the wheel diameter in inches. That works out to an overall diameter of about 27.40 inches, turning roughly 736 revolutions per mile. Overall diameter is what matters for speedometer accuracy and clearance when you change sizes, so compare it — not just the width — against your current tire.
The service description on this tire decodes to a load index of 100 — a maximum load of 1,764 lbs per tire. The speed symbol S corresponds to a maximum sustained speed of 112 mph.
Specifications
| Size | 225/70R15 |
| Tire Type | Touring |
| Service Description | 100S |
| Load Index | 100 |
| Speed Rating | S |
| Load Range | SL |
| Section Width (mm) | 225 |
| Aspect Ratio | 70 |
| Overall Diameter (in) | 27.44 |
| Tread Depth (/32") | 10.2 |
Frequently asked questions
What does 100S mean on the Ironman RB 12 NWS?
100S breaks down as load index 100 — rated for 1,764 lbs per tire — with an S speed rating, good for a maximum sustained 112 mph.
What kind of tire is the Ironman RB 12 NWS?
The Ironman RB 12 NWS in 225/70R15 is a touring tire.
Will 225/70R15 tires fit my vehicle?
Check the size molded into your current tire's sidewall or the tire placard inside the driver's door jamb — if it reads 225/70R15, this tire matches your vehicle's fitment. If you're changing sizes, compare overall diameter to keep your speedometer and clearances right.
Keep shopping
See every Ironman RB 12 NWS size, or view all tires at ThreePiece.us.
- BRAND:
- Ironman
- Model:
- IRON RB 12 NWS
- Size:
- 225/70R15
- Aspect Ratio:
- 70
- Load Index:
- 100
- Load Range:
- SL
- Section Width:
- 225
- Service Description:
- 100S
- Speed Index:
- S
- Temperature:
- N/A
- Tire Rim Diameter:
- 27.44
- Tire Type:
- Touring
- Traction:
- N/A
- Tread Wear:
- N/A
- Tread Depth:
- 10.2
- UQTG:
- N/A
- Warranty:
- N/A
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