NT555RII
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Specifications
| Size | P305/45R17 LL NT555RII (Dot-Compliant) |
|---|---|
| Width | 305 mm |
| Aspect ratio | 45 |
| Rim diameter | R17 |
| Load index | 102 |
| Speed rating | W |
| Load range | LL |
| UTQG | 100 A A |
|---|---|
| Tread depth | 6.3/32" |
| Weight | 31.09 lbs |
| Max pressure | 44 psi |
| Severe snow (3PMSF) | No |
| Run-flat | No |
About the Nitto NT555RII
D.O.T. Compliant Road Race Competition Radial tire designed with the Muscle Car Racer in mind.
Features
* Semi slick shoulder block design* Specifically designed sidewall construction* High modulus polyester carcass, reinforced sidewall and semi-radial body construction* Road race compound
Benefits
* Minimizes heat build up and maximizes cornering grip and turn-in response* Increases steering feedback and precision for driver confidence* Increases stability during braking, cornering and straight-aways* Balances dry traction, consistency, heat cycle performance, heat resistance and longevity
Understanding the P305/45R17 size
In the size code 305/45R17, 305 is the section width in millimetres (about 12"). 45 is the aspect ratio — the sidewall height is 45% of the width, or roughly 137.3 mm. R17 means radial construction on a 17-inch wheel, giving an approximate overall diameter of 27.8".
The load index 102 means each tire supports up to 1,874 lbs — about 7,496 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 100 A A. The treadwear grade of 100 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 $270.00 per tire, a full set of four costs $1080.00.
Frequently asked questions
What does the tire size 305/45R17 mean?
305 is the section width in millimetres, 45 is the aspect ratio (sidewall height as a percentage of width, about 137.3 mm), and R17 indicates radial construction for a 17-inch wheel. Overall diameter is approximately 27.8 inches.
What are the load and speed ratings of the Nitto NT555RII P305/45R17?
Its load index of 102 allows up to 1,874 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 Nitto NT555RII P305/45R17 tires cost?
A single tire is $270.00 and a set of four is $1080.00.
Does the NT555RII come in other sizes?
Yes — we stock 28 additional NT555RII sizes besides P305/45R17. Fit only a size approved for your vehicle.