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Radar
Radar DIMAX R8 PLUS 275/40R21
Radar DIMAX R8 PLUS 275/40R21
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Radar
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/week
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Width:
21.00
(in)
Height:
10.83
(in)
Depth:
21.00
(in)
SKU:
Radardsc0221
$233.00
Lease-to-own for as low as
/week
Get Started
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Looking for a 275/40R21 tire? The Radar DIMAX R8 PLUS is available now at ThreePiece.us with free shipping on every order and Affirm financing at checkout.
What 275/40R21 means
In the size 275/40R21, 275 is the section width in millimeters (10.83 in), 40 is the aspect ratio — the sidewall stands 40% as tall as the tire is wide, or 110.0 mm (4.33 in) — R denotes radial construction, and 21 is the wheel diameter in inches. That works out to an overall diameter of about 29.66 inches, turning roughly 680 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 107 — a maximum load of 2,150 lbs per tire. The speed symbol Y corresponds to a maximum sustained speed of 186 mph.
Specifications
| Size | 275/40R21 |
| Service Description | 107Y |
| Load Index | 107 |
| Speed Rating | Y |
| Section Width (mm) | 275 |
| Aspect Ratio | 40 |
| Temperature Grade | ATIRE RIM DIAMETER=21TIRE TYPE=TRACTION=ATREAD WEAR=320TREAD DEPTH=UQTG=320 A AWARRANTY= |
Frequently asked questions
Will 275/40R21 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 275/40R21, this tire matches your vehicle's fitment. If you're changing sizes, compare overall diameter to keep your speedometer and clearances right. See every 275/40R21 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.
What does 107Y mean on the Radar DIMAX R8 PLUS?
107Y breaks down as load index 107 — rated for 2,150 lbs per tire — with a Y speed rating, good for a maximum sustained 186 mph.
Keep shopping
Shop all 275/40R21 tires, browse Radar tires, see every Radar DIMAX R8 PLUS size, or view all tires at ThreePiece.us.
- BRAND:
- Radar
- MODEL:
- DIMAX R8 PLUS
- SIZE:
- 275/40R21
- ASPECT RATIO:
- 40
- LOAD INDEX:
- 107
- SECTION WIDTH:
- 275
- SERVICE DESCRIPTION:
- 107Y
- SPEED INDEX:
- Y
- TEMPERATURE:
- ATIRE RIM DIAMETER=21TIRE TYPE=TRACTION=ATREAD WEAR=320TREAD DEPTH=UQTG=320 A AWARRANTY=
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