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Accelera
Accelera PHI 245/40R21
Accelera PHI 245/40R21
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Shop the Accelera PHI 245/40R21 at ThreePiece.us — free shipping on every order, Affirm financing available, and fast delivery nationwide.
What 245/40R21 means
In the size 245/40R21, 245 is the section width in millimeters (9.65 in), 40 is the aspect ratio — the sidewall stands 40% as tall as the tire is wide, or 98.0 mm (3.86 in) — R denotes radial construction, and 21 is the wheel diameter in inches. That works out to an overall diameter of about 28.72 inches, turning roughly 702 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 115 — a maximum load of 2,679 lbs per tire. The speed symbol H corresponds to a maximum sustained speed of 130 mph.
Specifications
| Size | 245/40R21 |
| Service Description | 115H |
| Load Index | 115 |
| Speed Rating | H |
| Load Range | SL |
| Section Width (mm) | 245 |
| Aspect Ratio | 40 |
| Temperature Grade | BTIRE RIM DIAMETER=21TIRE TYPE=TRACTION=ATREAD WEAR=520TREAD DEPTH=UQTG=520 A BWARRANTY= |
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 115H mean on the Accelera PHI?
115H breaks down as load index 115 — rated for 2,679 lbs per tire — with an H speed rating, good for a maximum sustained 130 mph.
Will 245/40R21 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 245/40R21, this tire matches your vehicle's fitment. If you're changing sizes, compare overall diameter to keep your speedometer and clearances right.
Keep shopping
Browse Accelera tires, see every Accelera PHI size, or view all tires at ThreePiece.us.
- BRAND:
- Accelera
- MODEL:
- PHI
- SIZE:
- 245/40R21
- ASPECT RATIO:
- 40
- LOAD INDEX:
- 115
- LOAD RANGE:
- SL
- SECTION WIDTH:
- 245
- SERVICE DESCRIPTION:
- 115H
- SPEED INDEX:
- H
- TEMPERATURE:
- BTIRE RIM DIAMETER=21TIRE TYPE=TRACTION=ATREAD WEAR=520TREAD DEPTH=UQTG=520 A BWARRANTY=
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