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Delta
Delta GRAND PRIX TOUR RS 225/40R18
Delta GRAND PRIX TOUR RS 225/40R18
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Shop the Delta GRAND PRIX TOUR RS 225/40R18 at ThreePiece.us — free shipping on every order, Affirm financing available, and fast delivery nationwide.
What 225/40R18 means
In the size 225/40R18, 225 is the section width in millimeters (8.86 in), 40 is the aspect ratio — the sidewall stands 40% as tall as the tire is wide, or 90.0 mm (3.54 in) — R denotes radial construction, and 18 is the wheel diameter in inches. That works out to an overall diameter of about 25.09 inches, turning roughly 804 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 92 — a maximum load of 1,389 lbs per tire. The speed symbol V corresponds to a maximum sustained speed of 149 mph.
Specifications
| Size | 225/40R18 |
| Service Description | 92V |
| Load Index | 92 |
| Speed Rating | V |
| Section Width (mm) | 225 |
| Aspect Ratio | 40 |
| Temperature Grade | ATIRE RIM DIAMETER=18TIRE TYPE= TRACTION=ATREAD WEAR=380TREAD DEPTH=UQTG=380 A AWARRANTY= |
Frequently asked questions
How fast does this tire ship?
Every order at ThreePiece.us ships free, with fast delivery from a nationwide warehouse network. Affirm financing is available at checkout.
What does 92V mean on the Delta GRAND PRIX TOUR RS?
92V breaks down as load index 92 — rated for 1,389 lbs per tire — with a V speed rating, good for a maximum sustained 149 mph.
Will 225/40R18 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 225/40R18, this tire matches your vehicle's fitment. If you're changing sizes, compare overall diameter to keep your speedometer and clearances right. See every 225/40R18 tire in stock to compare options.
Keep shopping
Shop all 225/40R18 tires, browse Delta tires, see every Delta GRAND PRIX TOUR RS size, or view all tires at ThreePiece.us.
- BRAND:
- Delta
- MODEL:
- GRAND PRIX TOUR RS
- SIZE:
- 225/40R18
- ASPECT RATIO:
- 40
- LOAD INDEX:
- 92
- SECTION WIDTH:
- 225
- SERVICE DESCRIPTION:
- 92V
- SPEED INDEX:
- V
- TEMPERATURE:
- ATIRE RIM DIAMETER=18TIRE TYPE= TRACTION=ATREAD WEAR=380TREAD DEPTH=UQTG=380 A AWARRANTY=
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