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Toyo
Toyo TOY Proxes RR 255/40ZR17
Toyo TOY Proxes RR 255/40ZR17
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The Toyo Proxes RR in 255/40R17 ships free from ThreePiece.us, with Affirm financing available at checkout and fast delivery from a nationwide warehouse network.
What 255/40R17 means
In the size 255/40R17, 255 is the section width in millimeters (10.04 in), 40 is the aspect ratio — the sidewall stands 40% as tall as the tire is wide, or 102.0 mm (4.02 in) — R denotes radial construction, and 17 is the wheel diameter in inches. That works out to an overall diameter of about 25.03 inches, turning roughly 806 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 17 inches — when clearance is tight, go by the published figure rather than the nominal size math.
Specifications
| Size | 255/40ZR17 |
| Tire Type | Competition |
| Load Range | SL |
| Section Width (mm) | 255 |
| Aspect Ratio | 40 |
| Overall Diameter (in) | 17 |
| Tread Depth (/32") | 3.7 |
| Treadwear | 40 |
| Traction Grade | C |
| Temperature Grade | A |
| UTQG | 40CA |
Frequently asked questions
What kind of tire is the Toyo Proxes RR?
The Toyo Proxes RR in 255/40R17 is a competition tire.
What are the treadwear and warranty ratings on the Toyo Proxes RR?
This tire carries a treadwear grade of 40, traction grade C, temperature grade A under UTQG.
Will 255/40R17 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 255/40R17, 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 Toyo Proxes RR size, or view all tires at ThreePiece.us.
- Brand:
- Toyo
- Model:
- TOY Proxes RR
- Size:
- 255/40ZR17
- Aspect Ratio:
- 40
- Load Index:
- N/A
- Load Range:
- SL
- Section Width:
- 255
- Service Description:
- N/A
- Speed Index:
- N/A
- Temperature:
- A
- Tire Rim Diameter:
- 17
- Tire Type:
- Competition
- Traction:
- C
- Tread Wear:
- 40
- Tread Depth:
- 3.7
- UQTG:
- 40CA
- Warranty:
- N/A
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