Write a Review
Ironman
Ironman Iron RB 12 225/70R15
Ironman Iron RB 12 225/70R15
📧 Get Fitment Help
Verify parts fit & get product recommendations
Lease-to-own for as low as
/week
Get Started
Guaranteed to Fit — confirm your size with the fitment checker on this page
Price Match Guarantee Learn More
Free Mount & Balance
Free Shipping
OUT OF STOCK 
📧 Get Fitment Help
Verify parts fit & get product recommendations
Shop the Ironman RB 12 225/70R15 at ThreePiece.us — free shipping on every order, Affirm financing available, and fast delivery nationwide.
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 T corresponds to a maximum sustained speed of 118 mph.
Specifications
| Size | 225/70R15 |
| Tire Type | Touring |
| Service Description | 100T |
| Load Index | 100 |
| Speed Rating | T |
| Load Range | SL |
| Section Width (mm) | 225 |
| Aspect Ratio | 70 |
| Overall Diameter (in) | 27.44 |
| Tread Depth (/32") | 11.1 |
| Treadwear | 440 |
| Traction Grade | A |
| Temperature Grade | B |
| UTQG | 440AB |
Frequently asked questions
What are the treadwear and warranty ratings on the Ironman RB 12?
This tire carries a treadwear grade of 440, traction grade A, temperature grade B under UTQG.
What does 100T mean on the Ironman RB 12?
100T breaks down as load index 100 — rated for 1,764 lbs per tire — with a T speed rating, good for a maximum sustained 118 mph.
What kind of tire is the Ironman RB 12?
The Ironman RB 12 in 225/70R15 is a touring tire.
Keep shopping
See every Ironman RB 12 size, or view all tires at ThreePiece.us.
- BRAND:
- Ironman
- Model:
- IRON RB 12
- Size:
- 225/70R15
- Aspect Ratio:
- 70
- Load Index:
- 100
- Load Range:
- SL
- Section Width:
- 225
- Service Description:
- 100T
- Speed Index:
- T
- Temperature:
- B
- Tire Rim Diameter:
- 27.44
- Tire Type:
- Touring
- Traction:
- A
- Tread Wear:
- 440
- Tread Depth:
- 11.1
- UQTG:
- 440AB
- Warranty:
- N/A
PRODUCT REVIEWS (0)
Overall Rankings
Have you tried this product?
WRITE A REVIEWNo reviews for this product yet. Be the first to write a review!
Write a Review