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Toyo
Toyo TOY Proxes Sport 315/35R21XL
Toyo TOY Proxes Sport 315/35R21XL
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Shop the Toyo Proxes Sport 315/35R21 at ThreePiece.us — free shipping on every order, Affirm financing available, and fast delivery nationwide.
What 315/35R21 means
In the size 315/35R21, 315 is the section width in millimeters (12.40 in), 35 is the aspect ratio — the sidewall stands 35% as tall as the tire is wide, or 110.2 mm (4.34 in) — R denotes radial construction, and 21 is the wheel diameter in inches. That works out to an overall diameter of about 29.68 inches, turning roughly 679 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 manufacturer lists the overall diameter of this specific tire as 21 inches — when clearance is tight, go by the published figure rather than the nominal size math.
The service description on this tire decodes to a load index of 111 — a maximum load of 2,403 lbs per tire. The speed symbol Y corresponds to a maximum sustained speed of 186 mph.
Specifications
| Size | 315/35R21xL |
| Tire Type | Highway |
| Service Description | 111Y |
| Load Index | 111 |
| Speed Rating | Y |
| Load Range | XL |
| Section Width (mm) | 315 |
| Aspect Ratio | 35 |
| Overall Diameter (in) | 21 |
| Tread Depth (/32") | 9.8 |
| Treadwear | 240 |
| Traction Grade | AA |
| Temperature Grade | A |
| UTQG | 240AAA |
| Warranty | 25K |
Frequently asked questions
What are the treadwear and warranty ratings on the Toyo Proxes Sport?
This tire carries a treadwear grade of 240, traction grade AA, temperature grade A under UTQG. The manufacturer's warranty is 25K.
What does 111Y mean on the Toyo Proxes Sport?
111Y breaks down as load index 111 — rated for 2,403 lbs per tire — with a Y speed rating, good for a maximum sustained 186 mph.
What kind of tire is the Toyo Proxes Sport?
The Toyo Proxes Sport in 315/35R21 is a highway tire.
Keep shopping
See every Toyo Proxes Sport size, or view all tires at ThreePiece.us.
- Brand:
- Toyo
- Model:
- TOY Proxes Sport
- Size:
- 315/35R21xL
- Aspect Ratio:
- 35
- Load Index:
- 111
- Load Range:
- XL
- Section Width:
- 315
- Service Description:
- 111Y
- Speed Index:
- Y
- Temperature:
- A
- Tire Rim Diameter:
- 21
- Tire Type:
- Highway
- Traction:
- AA
- Tread Wear:
- 240
- Tread Depth:
- 9.8
- UQTG:
- 240AAA
- Warranty:
- 25K
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