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Nitto NT555 G2 View Gallery (1)
195-295/30-55 R15-22 54 sizes 2016

Nitto NT555 G2

Nitto Tyres Trackday and Competition Summer

The Nitto NT555 G2 is a Trackday and Competition Summer tyre designed to be fitted to Passenger Cars.

4.7
Tyre Reviews Score Based on Professional Tests & User Reviews
Limited Confidence View Breakdown
Dry Grip
80%
Wet Grip
63%
Road Feedback
83%
Handling
78%
Wear
73%
Comfort
68%
Buy again
55%
5 Reviews
71% Average
65,500 miles driven
1 Tests (avg: 10th)
Nitto NT555 G2

Nitto NT555 G2

Summer Mid-Range
BETA
4.7 / 10
Based on Professional Tests & User Reviews · Limited Confidence · Updated 23 Feb 2026

The Tyre Reviews Score is the most comprehensive tyre scoring system available. It aggregates professional test data from multiple independent publications, user reviews, and consistency analysis using Bayesian statistical methods, weighted normalisation, and recency-adjusted scoring to produce a single, reliable performance rating.

Learn more about our methodology
Category Scores
Dry
52.4
1.8x / 5 tests
Wet
40
2x / 4 tests
Cross-Category Performance

Cross-category scores are derived metrics that combine data from multiple test disciplines to evaluate real-world performance characteristics.

Braking
40
2 tests
Handling
40
4 tests
Score Components
Professional Tests
Weight: 80%
Tests: 1
Publications: 1
Period: 2025
User Reviews
Weight: 15%
Reviews: 5
Avg Rating: 71.1%
Min Required: 5
Consistency
Weight: 5%
Score Std Dev: 0.79
History Points: 10
Methodology & Configuration
Scoring Process
  1. Collect Test Data: Gather results from professional tyre tests across multiple publications. Minimum 1 test(s) required.
  2. Normalize Positions: Convert test positions to percentile scores using exponential weighting (factor: 1.2).
  3. Apply Recency Weighting: More recent tests are weighted higher with a decay rate of 0.95.
  4. Incorporate User Reviews: Factor in user review data (minimum 5 reviews). Weight: 15%.
  5. Bayesian Smoothing: Apply Bayesian prior (score: 7, weight: 1.5) to prevent extreme scores with limited data.
  6. Calculate Final Score: Combine all components using normalization factor of 1.1. Max score with limited data: 9.5.
Component Weights
Test Data
80%
User Reviews
15%
Consistency
5%
All Configuration Parameters
ParameterValueDescription
safety_weight 0.7 Weight multiplier for safety-related metrics
performance_weight 0.55 Weight multiplier for performance metrics
comfort_weight 0.4 Weight multiplier for comfort metrics
value_weight 0.45 Weight multiplier for value-for-money metrics
user_reviews_weight 0.15 How much user reviews contribute to the final score
test_data_weight 0.8 How much professional test data contributes to the final score
consistency_weight 0.05 How much score consistency contributes to the final score
recency_decay_rate 0.95 Rate at which older test results lose influence (higher = slower decay)
min_test_count 1 Minimum number of professional tests required
min_review_count 5 Minimum number of user reviews required
score_version 1.9 Current version of the scoring algorithm
score_normalization_factor 1.1 Factor used to normalize raw scores to the 0-10 scale
confidence_factor_weight 0.2 How much data confidence affects the final score
position_penalty_weight 0.2 Penalty applied for poor test positions
gap_penalty_threshold 12 Score gap (%) that triggers additional penalties
min_metrics_count 2 Minimum number of test metrics needed per test
limited_data_threshold 2 Number of tests below which data is considered limited
single_test_penalty 0.75 Score multiplier when only one test is available
critical_metric_penalty 0.7 Penalty for poor performance on critical safety metrics
critical_metric_threshold 70 Score below which a critical metric penalty applies
position_exponential_factor 1.2 Exponent used to amplify position-based scoring
position_exponential_threshold 0.9 Position percentile below which exponential scoring applies
gap_multiplier_critical 3 Multiplier for critical gap penalties
max_category_weight 2 Maximum weight any single category can have
max_score_limited_data 9.5 Score cap when data is limited
bayesian_prior_weight 1.5 Weight of the Bayesian prior in smoothing
bayesian_prior_score 7 Prior score used for Bayesian smoothing
evidence_test_multiplier 1.9 Multiplier for test evidence in confidence calculation
evidence_metric_divisor 3 Divisor for metric count in evidence calculation
evidence_review_divisor 10 Divisor for review count in evidence calculation
combined_penalty_floor 0.2
Data Sources
TestPublicationDateSizePositionMetrics
2025 Tire Rack UUHP Summer Tyre Test Tire Rack 2025 275/35 R19 10/10 9 metrics
All Tests
View Test Results
1
Tests
10th
Average
10th
Best
10th
Worst
Latest Tyre Test Results
2025 Tire Rack UUHP Summer Tyre Test
275/35 R19 • 2025
10th/10
Comfortable enough over impacts and easy to control at the limit, but limited by low wet and dry grip that leaves it drifting rather than driving quickly. It’s predictable but slow, finishing last in lap times and braking distances in the group.
Size Fuel Wet Noise
15 inch
195/55 R15 85 W D C 70
16 inch
205/55 R16 94 W XL C C 70
17 inch
225/45 R17 94 W XL D B 70
215/55 R17 94 V D B 70
215/45 R17 91 W XL D B 70
18 inch
225/40 R18 92 Y XL D B 70
245/45 R18 100 Y XL D B 70
245/40 R18 97 Y XL D B 70
255/35 R18 94 Y XL D B 71
19 inch
235/35 R19 91 Y XL D B 70
20 inch
245/35 R20 95 Y XL D B 70
View All Sizes and EU Label Scores for the Nitto NT555 G2 >>

Questions and Answers for the Nitto NT555 G2

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Top 3 Nitto NT555 G2 Reviews

Given 63% while driving a Ford Mustang GT Convertible (285/35 R18) on a combination of roads for 12,000 spirited miles
These tires perform best when you can get them hot. Under 60 degrees (F) they are noticeably slicker, I only run these tires in the late spring and summer. These tires have a fairly rigid sidewall so don't expect them to ride like a grand touring tire. The amount of feedback in the tire is pretty good. I found these tires like to pull the car into the ruts of the road. I get the tires spinning pretty often at intersections and in parking lots and so far haven't had any excess wear or chunking issues. You can get away with the speed limit in light rain, but in moderate and heavy rain you will be going at least 5-10 mph under the posted speed. Expect the rear end to slide out often and expect fairly long stopping distances in the wet.
Helpful 801
February 14, 2024
Given 54% while driving a Mazda RX 8 231PS (225/45 R19) on a combination of roads for 2,000 spirited miles
These came with my car so I'm reviewing them in used condition, but tread life etc. appeared fine when received. They perform ok in the dry at high temperatures, so I would say they are acceptable as summer tires depending on pricing etc. In cold or rainy weather they don't do well, and I would avoid driving on them in cold, rainy weather especially. Car starting sliding on the highway today with them despite driving carefully (rear slide out at about 90mph going uphill in 40F, drizzly weather).
Helpful 706
November 13, 2023
Jaguar F Type (305/30 R20) on mostly motorways for 3,500 spirited miles
Deathwish if driving in wet conditions
Helpful 791
March 7, 2022

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Latest Nitto NT555 G2 Reviews

Given 100% while driving a Toyota Corolla Altis (225/45 R17) on a combination of roads for 45,000 average miles
Good control. Good dry handing.
Helpful 888
July 19, 2020
Given 67% while driving a Ford Focus ST250 (235/40 R18 W) on a combination of roads for 3,000 spirited miles
Dry-grip is okay-ish. On my Focus ST, it's pretty understeery and I can't say for sure, but it sort of feels like it is even easier to overdrive this tire than my previous, 4 year old Eagle F1 Asymetric 2's.
Launch grip... well... wheel spin in 1st and 2nd gear. Even when I'm flooring it in 2nd gear at 25 mph. It isn't bad, but I've expected more.

Wet grip... it's okay, as long as you don't push it.

Feedback feels good and direct

Handling - the tire tells you clearly when you're overdriving it. But the limit is too low imo.

Wear seems fine so far.

Comfort - not that much. On really smooth surfaces it's okay. On rough tarmac or with many cracks in the road it is pretty loud.On paving stones it sounds like your wheels are made out of wood.

Helpful 883
May 14, 2019
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