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Sunny NC501 View Gallery (1)
155-255/45-80 R13-20 113 sizes 2018 Winter rated

Sunny NC501

The Sunny NC501 is a Touring All Season tyre designed to be fitted to Passenger Cars.

6.7
Tyre Reviews Score Based on Professional Tests
Medium Confidence View Breakdown
Dry Grip
0%
Wet Grip
0%
Road Feedback
0%
Handling
0%
Wear
0%
Comfort
0%
Buy again
0%
Snow Grip
0%
Ice Grip
0%
2 Tests (avg: 7th)
Sunny NC501

Sunny NC501

All Season Economy
BETA
6.7 / 10
Based on Professional Tests · Medium Confidence · Updated 30 Jan 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
Comfort
73.8
0.29x / 1 test
Dry
65
1.5x / 4 tests
Snow
59.5
1.38x / 5 tests
Value
53.9
0.38x / 1 test
Wet
40
2x / 5 tests

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

Traction
70
1 test
Braking
58.5
6 tests
Handling
47.5
6 tests
Score Components
Professional Tests
Weight: 80%
Tests: 2
Publications: 2
Period: 2025
User Reviews
Weight: 15%
Reviews: 0
Avg Rating: 0%
Min Required: 5
Consistency
Weight: 5%
Score Std Dev: 0.18
History Points: 6
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 1.8 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 8 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 0.1 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
Data Sources
TestPublicationDateSizePositionMetrics
2025 Motor All Season Tyre Test Motor 2025 215/55 R17 7/7 10 metrics
2025 Mid Range All Season Tyre Test Wybór Kierowców 2025 215/55 R17 6/6 6 metrics
2
Tests
7th
Average
6th
Best
7th
Worst
Latest Tyre Test Results
6th/6
The Sunny NC501 finishes last in the test with an average point score, though it maintains required safety margins throughout. The Chinese budget tyre loses the most points on wet surfaces, where it performs poorly with the longest braking distances and weakest handling characteristics. On dry roads and in winter conditions, the NC501 performs at an average level without any particular strengths or weaknesses. The tyre also suffers from high rolling resistance, impacting fuel efficiency negatively. While it offers decent dry road parameters, the significant performance gap on wet asphalt is concerning. The price is not particularly attractive compared to better-performing alternatives, making it difficult to recommend despite meeting basic safety requirements.
7th/7
The Sunny NC501 finishes last in the overall rankings with an average point score. This Chinese-manufactured budget tyre proves to be an improperly balanced product. While it performs adequately on dry surfaces and in winter conditions, it fails significantly on wet asphalt, losing all wet-surface tests. Most critically, the NC501 does not provide the required level of safety during emergency wet braking situations, with results described as being on the borderline of acceptability. Drivers should be particularly cautious about this tyre's limitations in rainy conditions, where its shortcomings could pose genuine safety concerns.
Size Fuel Wet Noise
13 inch
155/80R13 79 T D D 67
155/80R13 79 T D D 67
14 inch
185/60R14 82 H C C 67
175/65R14 82 T C D 67
165/70R14 81 T D D 67
175/65R14 82 T D D 67
165/70R14 81 T D D 67
185/60R14 82 H D C 67
15 inch
195/55R15 85 V C C 67
185/65R15 92 H XL C C 67
185/65R15 88 H C C 67
195/65R15 91 H C C 67
195/65R15 95 H XL C C 67
195/65R15 95 H XL C C 67
185/65R15 92 H XL C C 67
195/65R15 91 H C C 67
195/55R15 85 V D C 67
185/65R15 88 H D C 67
16 inch
215/60R16 99 V XL C C 70
215/70R16 100 H C C 70
205/55R16 91 V C C 67
205/55R16 94 V XL C C 67
205/60R16 96 V XL C C 67
215/60R16 99 V XL B C 70
215/70R16 100 H B C 70
205/55R16 94 V XL C C 67
205/55R16 91 V C C 67
205/60R16 96 V XL C C 67
17 inch
235/65R17 108 V XL C C 70
225/60R17 103 V XL C C 70
225/60R17 103 V XL B C 70
235/65R17 108 V XL B C 70
215/55R17 98 W XL B C 70
225/45R17 94 W XL C C 70
215/45R17 91 W XL C C 70
225/50R17 98 W XL B C 70
225/45R17 94 Y XL C C 70
205/50R17 93 W XL C C 67
205/50R17 93 W XL C C 67
225/45R17 94 W XL C C 70
215/45R17 91 W XL C C 70
215/55R17 98 W XL C C 70
225/50R17 98 W XL C C 70
18 inch
235/60R18 107 V XL C C 70
235/60R18 107 V XL B C 70
245/40R18 97 Y XL C C 70
225/40R18 92 W XL C C 70
245/45R18 100 W XL B C 70
245/45R18 100 Y XL B C 70
245/40R18 97 W XL C C 70
225/40R18 92 W XL C C 70
19 inch
235/35R19 91 Y XL C C 70
20 inch
255/45R20 105 W XL B C 72
View All Sizes and EU Label Scores for the Sunny NC501 >>

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