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Sunny SN3860

Sunny Tyres High Performance Winter

The Sunny SN3860 is a High Performance Winter tyre designed to be fitted to Passenger Cars.

3.8
Tyre Reviews Score Based on Professional Tests & User Reviews
Medium Confidence View Breakdown
Dry Grip
62%
Wet Grip
62%
Road Feedback
62%
Handling
63%
Wear
67%
Comfort
63%
Buy again
63%
Snow Grip
10%
Ice Grip
10%
6 Reviews
51% Average
49,500 miles driven
1 Tests (avg: 21st)
Sunny SN3860

Sunny SN3860

Winter Economy
BETA
3.8 / 10
Based on Professional Tests & User Reviews · Medium 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
77.5
1.13x / 2 tests
Wet
65.5
1.93x / 3 tests
Comfort
60
0.32x / 1 test
Value
54.7
0.38x / 1 test
Ice
48.8
1.2x / 4 tests
Snow
40
1.5x / 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
60.4
4 tests
Traction
53
2 tests
Handling
47.2
7 tests
Score Components
Professional Tests
Weight: 80%
Tests: 1
Publications: 1
Period: 2020
User Reviews
Weight: 15%
Reviews: 6
Avg Rating: 51.3%
Min Required: 5
Consistency
Weight: 5%
Score Std Dev: 1.18
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
2020 Nordic and Studded Winter Tyre Test Test World 2020 205/55 R16 21/20 14 metrics
All Tests
View Test Results
1
Tests
21st
Average
21st
Best
21st
Worst
Latest Tyre Test Results
2020 Nordic and Studded Winter Tyre Test
205/55 R16 • 2020
21st/20
Very short wet braking distances.
Practically no grip on ice and almost as bad in the snow, erratic handling in the wet.

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Show All Winter High Performance tyres
Size Fuel Wet Noise
13 inch
175/70R13 82 T D D 70
15 inch
195/60R15 88 T D D 71
195/65R15 91 H D D 71
195/65R15 91 T D D 71
16 inch
215/55R16 97 H XL D D 71
View All Sizes and EU Label Scores for the Sunny SN3860 >>

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Top 3 Sunny SN3860 Reviews

Given 10% while driving a (205/55 R16) on for 0 miles
"It was amazing and previously unheard of that in our winter tire comparison tests, we found a studded tire that was lost in ice grip tests for even the weakest friction tires! So by no means should you buy a Sunny Winter Grip SN3860 tire, no matter how cheap it is." Winter tyre test / Magazine: Tekniikan Maailma 17/2020 / Finland ----------------------------------------------------------------------------------------------- Oli hämmästyttävää ja ennen kuulumatonta, että talvirengasvertailumme testeissä löysimme nastarenkaan, joka hävisi jääpitoa mittaavissa kokeissa jopa heikoimmille kitkarenkaille! Sunny Winter Grip SN3860 -rengasta ei siis missään nimessä kannata hankkia, saipa sen miten halvalla hyvänsä. Tekniikan Maailma 17/2020
Helpful 919
September 16, 2020
Given 69% while driving a Toyota Corolla (205/55 R16) on mostly town for 5,500 average miles
The grip pattern looks like Toyo's .. Just sayin.. Lasted four seasons of Canadian city driving... Don't buy these if you travel on unsalted country roads where's there's ALoT of snow... Really made for Toronto or Montreal. I guess I can go a fifth year but I have little patience.. So I'll be trying hankooks next time around. I'll give them a pass but don't expect to keep up with michelins or any other brand names. Decent tire gets the job done... Good value!
Helpful 553
February 19, 2016
Given 84% while driving a Audi A3 2.0 TDI 140 (225/65 R15) on mostly motorways for 0 average miles
Excellent tyres. Nothing to complain for. Grip very well in snow. Very good.
Helpful 521
November 10, 2013

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Latest Sunny SN3860 Reviews

Given 70% while driving a SEAT EXEO. SE.(143) 2.0ltr dsl turbo (205/55 R16 T) on mostly motorways for 30,000 average miles
I changed the low profile wheels and tyres to reduce the harsh ride and replaced with alloys and these Sunny winter tyres, which I have run year round. They have been amazingly hardy and great in snow. Not bad in the dry, but leave a big gap if the road is damp rather than wet! That's the only reason I won't be buying them again. Having said that, I just slowed down a bit, so maybe no bad thing.
Helpful 514
July 15, 2013
Given 50% while driving a Chevrolet Lacetti (225/45 R17) on mostly country roads for 4,000 average miles
Not good when there's no snow.; Great when there's snow!
Helpful 584
September 17, 2011
Given 96% while driving a Audi 80 B4 (225/45 R17) on a combination of roads for 10,000 spirited miles
Have studded Sunny/Wanli. Never had such a good expierence with brand tyres.
Helpful 508
October 25, 2010
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