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Sunny NA305 View Gallery (3)
195-315/30-55 R16-20 88 sizes 2017
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Sunny NA305

Sunny Tires Touring Summer

The Sunny NA305 is a Touring Summer tire designed to be fitted to Passenger Cars.

6.0
Tire Reviews Score Based on Professional Tests
Medium Confidence View Breakdown
Dry Grip
60%
Wet Grip
35%
Road Feedback
53%
Handling
33%
Wear
30%
Comfort
65%
Buy again
27%
3 Reviews
43% Average
11,000 miles driven
2 Tests (avg: 8th)
Sunny NA305

Sunny NA305

Summer Economy
BETA
6 / 10
Based on Professional Tests · Medium Confidence · Updated 23 Feb 2026

The Tire Reviews Score is the most comprehensive tire 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
Value
84.5
0.42x / 2 tests
Comfort
57.4
0.32x / 4 tests
Wet
48.7
2x / 8 tests
Dry
44.8
1.8x / 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
48.7
4 tests
Handling
47.1
5 tests
Score Components
Professional Tests
Weight: 80%
Tests: 2
Publications: 1
Period: 2020 - 2025
User Reviews
Weight: 15%
Reviews: 3
Avg Rating: 43.3%
Min Required: 5
Consistency
Weight: 5%
Score Std Dev: 0.16
History Points: 10
Methodology & Configuration
Scoring Process
  1. Collect Test Data: Gather results from professional tire 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
Best Performance Tires For 2025 Tire Reviews 2025 225/40 R18 7/7 11 metrics
2020 Teknikens 17 Inch Summer Tire Test 2020 225/50 R17 9/10 7 metrics

Videos

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All Tests
View Test Results
2
Tests
8th
Average
7th
Best
9th
Worst
Latest Tire Test Results
Best Performance Tires For 2025
225/40 R18 • 2025
7th/7
Lowest rolling resistance in the test.
Everything else. Dangerously long wet braking.
It will be no surprise that the budget Sunny NA305 finished in last place, and was the worst in everything bar NVH and rolling resistance, and it wasn't just a little bit worse, 40% off in wet braking is tragic. When braking from motorway speeds, where you'd be stopped on the Pirelli, you'd still be doing 70 km/h on the sunny. That's bad. Think about hitting a stationary car at 70 km/h!.
2020 Teknikens 17 Inch Summer Tire Test
225/50 R17 • 2020
9th/10
Very low price, acceptable wet handling, low rolling resistance
Bad result the elk test, long braking distances on dry and wet surfaces, lowest comfort.
View Test Results
Size Fuel Wet Noise
17 inch
215/45R17 91 W XL C B 72
225/50R17 98 W XL C C 72
225/50R17 98 W XL C B 72
215/55R17 98 W XL C B 72
205/50R17 93 W XL C B 72
215/55R17 98 W XL C C 72
225/45R17 94 W XL C C 72
205/50R17 93 W XL C C 72
225/45R17 94 W XL C B 72
225/50R17 98 W XL C B 72
215/45R17 91 W XL C B 72
215/55R17 98 W XL C B 72
205/50R17 93 W XL C B 72
205/50R17 93 W XL C B 72
215/45R17 91 W XL C B 72
225/50R17 98 W XL C B 72
215/55R17 98 W XL C B 72
215/45R17 91 W XL C C 72
18 inch
245/40R18 97 W XL C B 72
245/45R18 100 W XL C C 72
245/45R18 100 W XL C B 72
225/40R18 92 W XL C C 72
245/40R18 97 W XL C C 72
255/35R18 94 W XL C B 73
225/40R18 92 W XL C B 72
245/45R18 100 W XL C B 72
245/40R18 97 W XL C B 72
245/45R18 100 W XL C B 72
19 inch
235/35R19 91 W XL C B 72
235/35R19 91 W XL C C 72
235/35R19 91 W XL C B 72
20 inch
245/35R20 95 W XL C B 72
245/35R20 95 W XL C C 72
245/35R20 95 W XL C B 72
View All Sizes and EU Label Scores for the Sunny NA305 >>

Questions and Answers for the Sunny NA305

Ask a question
August 26, 2022

I have just purchased an Audi Q3 2.0 TDI 1964. The dealer has fitted 4 x new Sunny NA305 tires. I appreciate this not ideal but are they dangerous in normal driving conditions?

I have not tested these tires so I can't give you a firm answer, however cheap Chinese brands like Sunny often test to have lower grip in the wet than midrange and premium tires so I would certainly be mindful of the grip in wet conditions. The dealer didn't put them on because they're good tires, the dealer put them on because they're cheap tires.
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Size Price Range  
Available in 5 tire sizes - View all.

Top 3 Sunny NA305 Reviews

Given 34% while driving a Nissan 2002 patrol (225/45 R17) on mostly town for 5,000 easy going miles
Bought these for my wife’s Nissan… after just shy of 5,000 miles they are both almost bald. Please note the car’s tracking is perfect and tires are equally worn all over.. they give poor feedback, low dry grip and shocking wear, wife also complains that the skid warning light comes on more often with these.. bought her these budget tires to get her car through the MOT, never expected them to need replacing after just 5k miles?!?!
Sunny NA305 image
Helpful 698
April 19, 2025
Given 35% while driving a Kia Motors Sportage (245/45 R19) on mostly town for 1,000 average miles
Sunny NA305 tires must be the worst tires I have experienced on a car in my 40 years of driving. I replaced my 2 front tires with a set early August when the weather was a little better.
In the dry, the tires squeal on corners when driving round town, as if they are running soft. In the wet, trying to pull away with any power causes wheelspins and traction control light to come on.
Cornering in the wet is awful. I have noticed it especially coming onto roundabouts where the road surface might be a little more greasy than normal, the front end of the car just gives up grip and will slide. They give no confidence whatsoever driving in the rain, so will not push them to any limits for fear of ending up in a ditch.
I will be returning to the garage I bought them to advise them of the problems, if they value their reputation, they will source another alternate budget tire.
I am going to try them on the rear axle to see how they perform, but will be expecting the car to have slightly different handling issues. Lesson learned, it was all the garage had in stock at the time, and gave me assurance they were of comparable quality to the tires they replaced. I will never buy a budget tire again. I wouldn't even fit these to a wheelbarrow.
Helpful 864
November 8, 2023
Given 57% while driving a BMW 323ti (225/45 R17) on a combination of roads for 5,000 average miles
Feels pretty good in the dry but really twitchy in the wet. Fuel consumption/rolling resistance is good. Can´t tell you about the Noise, due to a loud Exhaust. The Tire feels a bit stiff. All in all still an ok Tire for the Price.
Helpful 100
December 3, 2025

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