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Radar
Radar RCX-8 255/55R18
Radar RCX-8 255/55R18
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/week
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Width:
18.00
(in)
Height:
10.04
(in)
Depth:
18.00
(in)
SKU:
Radaracc0271
$151.00
Lease-to-own for as low as
/week
Get Started
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The Radar RCX-8 in 255/55R18 ships free from ThreePiece.us, with Affirm financing available at checkout and fast delivery from a nationwide warehouse network.
What 255/55R18 means
In the size 255/55R18, 255 is the section width in millimeters (10.04 in), 55 is the aspect ratio — the sidewall stands 55% as tall as the tire is wide, or 140.2 mm (5.52 in) — R denotes radial construction, and 18 is the wheel diameter in inches. That works out to an overall diameter of about 29.04 inches, turning roughly 694 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 109 — a maximum load of 2,271 lbs per tire. The speed symbol V corresponds to a maximum sustained speed of 149 mph.
Specifications
| Size | 255/55R18 |
| Service Description | 109V |
| Load Index | 109 |
| Speed Rating | V |
| Section Width (mm) | 255 |
| Aspect Ratio | 55 |
| Temperature Grade | ATIRE RIM DIAMETER=18TIRE TYPE=TRACTION=ATREAD WEAR=500TREAD DEPTH=UQTG=500 A AWARRANTY= |
Frequently asked questions
What does 109V mean on the Radar RCX-8?
109V breaks down as load index 109 — rated for 2,271 lbs per tire — with a V speed rating, good for a maximum sustained 149 mph.
Will 255/55R18 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 255/55R18, this tire matches your vehicle's fitment. If you're changing sizes, compare overall diameter to keep your speedometer and clearances right. See every 255/55R18 tire in stock to compare options.
How fast does this tire ship?
Every order at ThreePiece.us ships free, with fast delivery from a nationwide warehouse network. Affirm financing is available at checkout.
Keep shopping
Shop all 255/55R18 tires, browse Radar tires, see every Radar RCX-8 size, or view all tires at ThreePiece.us.
- BRAND:
- Radar
- MODEL:
- RCX-8
- SIZE:
- 255/55R18
- ASPECT RATIO:
- 55
- LOAD INDEX:
- 109
- SECTION WIDTH:
- 255
- SERVICE DESCRIPTION:
- 109V
- SPEED INDEX:
- V
- TEMPERATURE:
- ATIRE RIM DIAMETER=18TIRE TYPE=TRACTION=ATREAD WEAR=500TREAD DEPTH=UQTG=500 A AWARRANTY=
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