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Continental
Continental CON CST17 Spare 145/85R18
Continental CON CST17 Spare 145/85R18
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Continental
UPC:
00051342020874
Lease-to-own for as low as
/week
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Width:
18.00
(in)
Height:
5.71
(in)
Depth:
18.00
(in)
SKU:
3115320000
|
$147.00
Lease-to-own for as low as
/week
Get Started
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The Continental CST17 Spare in 145/85R18 ships free from ThreePiece.us, with Affirm financing available at checkout and fast delivery from a nationwide warehouse network.
What 145/85R18 means
In the size 145/85R18, 145 is the section width in millimeters (5.71 in), 85 is the aspect ratio — the sidewall stands 85% as tall as the tire is wide, or 123.2 mm (4.85 in) — R denotes radial construction, and 18 is the wheel diameter in inches. That works out to an overall diameter of about 27.70 inches, turning roughly 728 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 103 — a maximum load of 1,929 lbs per tire. The speed symbol M corresponds to a maximum sustained speed of 81 mph.
Specifications
| Size | 145/85R18 |
| Tire Type | All-Season |
| Service Description | 103M |
| Load Index | 103 |
| Speed Rating | M |
| Load Range | SL |
| Section Width (mm) | 145 |
| Aspect Ratio | 85 |
| Overall Diameter (in) | 27.7 |
| Tread Depth (/32") | 5 |
Frequently asked questions
What does 103M mean on the Continental CST17 Spare?
103M breaks down as load index 103 — rated for 1,929 lbs per tire — with an M speed rating, good for a maximum sustained 81 mph.
What kind of tire is the Continental CST17 Spare?
The Continental CST17 Spare in 145/85R18 is a all-season tire.
Will 145/85R18 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 145/85R18, 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 Continental CST17 Spare size, or view all tires at ThreePiece.us.
- BRAND:
- Continental
- Model:
- CON CST17 Spare
- Size:
- 145/85R18
- Aspect Ratio:
- 85
- Load Index:
- 103
- Load Range:
- SL
- Section Width:
- 145
- Service Description:
- 103M
- Speed Index:
- M
- Temperature:
- N/A
- Tire Rim Diameter:
- 27.7
- Tire Type:
- All-Season
- Traction:
- N/A
- Tread Wear:
- N/A
- Tread Depth:
- 5
- UQTG:
- N/A
- Warranty:
- N/A
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