GT Radial
Champiro SX2
245/40ZR18
$128.24/tire
$170.99
Set of 4: $512.96
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↩️ Free returns within 30 days — unmounted tires, prepaid label, no return shipping cost.
Specifications
| Size | 245/40ZR18 Champiro SX2 |
|---|---|
| Width | 245 mm |
| Aspect ratio | 40 |
| Rim diameter | R18 |
| Load index | 93 |
| Speed rating | W |
| Load range | SL |
| UTQG | 200 A A |
|---|---|
| Tread depth | 8/32" |
| Weight | 27.7 lbs |
| Max pressure | 51 psi |
| Severe snow (3PMSF) | No |
| Run-flat | No |
About the GT Radial Champiro SX2
Summer Extreme Performance Passenger Car tire for Both Track and Street Use.
Features
* Asymmetrical tread design* Dual block design* Wide centre rib* Silica tread compound* Gradient step design* Wide circumferential grooves* 5 Year Limited Warranty
Benefits
* Extra wide shoulder blocks increase cornering stability and grip* Improves handling, traction and braking performance* Provides increased traction and grip in both dry and wet conditions* Reduces heat generation in central tread ribs* Significantly reduces hydroplaning for improved traction on wet surfaces
Understanding the 245/40ZR18 size
In the size code 245/40R18, 245 is the section width in millimetres (about 9.6"). 40 is the aspect ratio — the sidewall height is 40% of the width, or roughly 98 mm. R18 means radial construction on a 18-inch wheel, giving an approximate overall diameter of 25.7".
The load index 93 means each tire supports up to 1,433 lbs — about 5,732 lbs across a full set of four. The speed symbol W certifies the tire to 168 mph under its rated load. Always match or exceed the load index and speed rating listed on your vehicle's door-jamb placard.
Tread life and grip ratings
This tire carries a UTQG rating of 200 A A. The treadwear grade of 200 is a relative durability score — a grade of 200 is expected to last roughly twice as long as a grade of 100 under the same controlled test. Traction grade A measures straight-line wet stopping grip (AA is highest, then A, B and C). Temperature grade A reflects heat resistance at sustained speed (A is highest).
Price and value
At $128.24 per tire, a full set of four costs $512.96. That is about 25% below the average price of the 127 tires we stock in this size.
Frequently asked questions
What does the tire size 245/40R18 mean?
245 is the section width in millimetres, 40 is the aspect ratio (sidewall height as a percentage of width, about 98 mm), and R18 indicates radial construction for a 18-inch wheel. Overall diameter is approximately 25.7 inches.
What are the load and speed ratings of the GT Radial Champiro SX2 245/40ZR18?
Its load index of 93 allows up to 1,433 lbs per tire. Its speed rating of W is certified to 168 mph. Check your door-jamb placard and do not fit a tire rated below the vehicle's requirement.
How much does a set of 4 GT Radial Champiro SX2 245/40ZR18 tires cost?
A single tire is $128.24 and a set of four is $512.96.
Does the Champiro SX2 come in other sizes?
Yes — we stock 8 additional Champiro SX2 sizes besides 245/40ZR18. Fit only a size approved for your vehicle.
