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Cooper
Cooper Cobra Instinct 235/40ZR18XL 95Y - 160117025
Cooper Cobra Instinct 235/40ZR18XL 95Y - 160117025
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The Cooper Cobra Instinct in 235/40R18 ships free from ThreePiece.us, with Affirm financing available at checkout and fast delivery from a nationwide warehouse network.
What 235/40R18 means
In the size 235/40R18, 235 is the section width in millimeters (9.25 in), 40 is the aspect ratio — the sidewall stands 40% as tall as the tire is wide, or 94.0 mm (3.70 in) — R denotes radial construction, and 18 is the wheel diameter in inches. That works out to an overall diameter of about 25.40 inches, turning roughly 794 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 95 — a maximum load of 1,521 lbs per tire. The speed symbol Y corresponds to a maximum sustained speed of 186 mph.
Load Range E corresponds to a 10-ply rating.
Specifications
| Size | 235/40ZR18XL |
| Tire Type | All Season |
| Service Description | 95Y |
| Load Index | 95 |
| Speed Rating | Y |
| Load Range | Extra Load |
| Section Width (mm) | 235 |
| Aspect Ratio | 40 |
| Overall Diameter (in) | 25.4 |
| Tread Depth (/32") | 10 |
| Treadwear | 500 |
| Traction Grade | AA |
| Temperature Grade | A |
| UTQG | 500AAA |
| Warranty | 45K |
Frequently asked questions
What does 95Y mean on the Cooper Cobra Instinct?
95Y breaks down as load index 95 — rated for 1,521 lbs per tire — with a Y speed rating, good for a maximum sustained 186 mph.
What kind of tire is the Cooper Cobra Instinct?
The Cooper Cobra Instinct in 235/40R18 is a all season tire.
What are the treadwear and warranty ratings on the Cooper Cobra Instinct?
This tire carries a treadwear grade of 500, traction grade AA, temperature grade A under UTQG. The manufacturer's warranty is 45K.
Keep shopping
Shop all 235/40R18 tires, browse Cooper tires, see every Cooper Cobra Instinct size, or view all tires at ThreePiece.us.
- BRAND:
- Cooper
- Model:
- Cobra Instinct
- Size:
- 235/40ZR18XL
- Aspect Ratio:
- 40
- Load Index:
- 95
- Load Range:
- Extra Load
- Section Width:
- 235
- Service Description:
- 95Y
- Speed Index:
- Y
- Temperature:
- A
- Tire Rim Diameter:
- 25.4
- Tire Type:
- All Season
- Traction:
- AA
- Tread Wear:
- 500
- Tread Depth:
- 10
- UQTG:
- 500AAA
- Warranty:
- 45K
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