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Sunny SN3830

The Sunny SN3830 is a High Performance Winter tyre designed to be fitted to Passenger Cars.

5.7
Tyre Reviews Score Based on Professional Tests & User Reviews
Medium Confidence View Breakdown
Dry Grip
56%
Wet Grip
45%
Road Feedback
49%
Handling
44%
Wear
70%
Comfort
67%
Buy again
43%
Snow Grip
80%
Ice Grip
70%
18 Reviews
58% Average
161,990 miles driven
4 Tests (avg: 34th)
Sunny SN3830

Sunny SN3830

Winter Economy
BETA
5.7 / 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
Value
96.7
0.42x / 2 tests
Snow
94.5
1.5x / 2 tests
Comfort
56.3
0.32x / 1 test
Dry
45.9
1.13x / 2 tests
Wet
40
1.93x / 3 tests

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

Braking
62.1
3 tests
Handling
58.3
3 tests
Score Components
Professional Tests
Weight: 80%
Tests: 4
Publications: 1
Period: 2012 - 2018
User Reviews
Weight: 15%
Reviews: 18
Avg Rating: 58.2%
Min Required: 5
Consistency
Weight: 5%
Score Std Dev: 0.9
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
2018 Autobild UHP Winter Tyre Test Auto Bild 2018 245/45 R18 10/11 10 metrics
2014 50 Winter Tyre Braking Overview Auto Bild 2014 225/50 R17 35/48 0 metrics
2013 Winter Tyre Overview - Braking Auto Bild 2013 195/65 R15 48/50 0 metrics
2012 Auto Bild 42 Winter Tyre Braking Test Auto Bild 2012 205/55 R16 41/43 0 metrics
4
Tests
34th
Average
10th
Best
48th
Worst
Latest Tyre Test Results
10th/11
Good comfort, fuel efficient, low price.
Extremely poor wet grip and long wet braking distances.
35th/48
48th/50

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Size Fuel Wet Noise
14 inch
165/60R14 79 H XL D D 71
16 inch
195/50R16 88 H XL D D 71
17 inch
235/65R17 108 V XL D D 71
225/60R17 103 V XL D D 71
18 inch
225/45R18 95 V XL D D 71
235/60R18 107 V XL D D 72
245/45R18 100 V XL D D 72
225/55R18 98 V D D 71
215/55R18 95 V D D 71
235/45R18 98 V XL D D 72
19 inch
245/40R19 98 V XL D D 71
255/50R19 107 V XL D D 72
225/55R19 99 V D D 71
View All Sizes and EU Label Scores for the Sunny SN3830 >>

Questions and Answers for the Sunny SN3830

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Top 3 Sunny SN3830 Reviews

Given 59% while driving a BMW 335i (225/45 R17) on mostly country roads for 3,000 spirited miles
These tyres, though old, were hopeless on lightly wet cold (freezing point) salted tarmac.
March 3, 2025
Given 32% while driving a BMW 520d (225/50 R17) on mostly motorways for 500 spirited miles
Don't buy these, they're dangerous and have virtually no grip!
I travel 100 miles daily to/from work doing the same route. Previousley I had Goodyear EfficientGrip Performance on my rear wheels and two different budget tyres on the front (the budgets came with the car) and I knew what speed I could take each corner at safely and never once lost control of the car of felt unsafe.
Within 1 week of having these on I've lost control of the car on more than one occasion on different corners already going much slower than I used to, each time I have managed to regainn control. For example a slight corner that I used to be able to take at 50mph I now have to go less than 30mph the grip is that bad!
November 24, 2017
Given 29% while driving a Volvo V50 estate (205/50 R17 V) on a combination of roads for 2,607 average miles
Horrific, dangerous Tyre. Should not be in production never mind being sold. Terrible in the dry, dangerous in the wet. Removed them from the front to the back and today the backend went sideways totally unexpectedly on a roundabout. Only covered 2600 miles on them and they will be removed as they are extremely dangerous. Driving for 26 yrs covering around 36k miles per year and never had tyres anything like this before.
February 5, 2017

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Latest Sunny SN3830 Reviews

Given 54% while driving a BMW 1 series (225/45 R17) on a combination of roads for 18,000 average miles
My scores don't accurately reflect the purpose of the tyre, which is for mud and snow. I have been driving them from November through to the end of March for two seasons. Regular routes include Deeside, Perthshire, Aberdeen and Edinburgh. In rain and snow these tyres perform adequaltely on my rear wheel drive car and enable me to keep traveling in a challenging environment. In mild weather on dry and damp road surfaces, it pays to be circumspect with speed and acceslaration on corners and roundabouts, as control and grip are more limted than my run flat tyes. In my opinion they are up to the job that they are desgned for and are great value for money at around £240 for four tyres.
January 5, 2016
Given 40% while driving a Skoda Octavia Scout (225/50 R17) on mostly country roads for 0 average miles
Wet/damp road lateral grip is almost non-existent. Don't buy these tyres unless you think unexpectedly slipping off a low speed corner into a ditch sounds like fun.
March 23, 2015
Given 83% while driving a Nissan xtrail 2.0 dci x3 (225/45 R17) on a combination of roads for 0 average miles
What a purchase, I have been running on these tyres for a winter season in Bavaria. I encountered all kinds of conditions and these tyres have been brilliant, I would definitely recommend.
February 8, 2015
Given 54% while driving a BMW 118d m sport (215/55 R16 W) on a combination of roads for 1,000 average miles
Firstly, these are labelled M+S SnowMaster. We've had the wettest mildest winter for years! I've only driven 1000 miles on them. The first point is their comfort compared with the low profile 18" run-flats. It's like driving a bigger, softer car. That's probably due to them being on 16" wheels and a 55% aspect ratio. I find these tyres acceptable for normal driving, but wouldnt want to push them to the limit in warm dry/wet conditions. They are as quiet as the OEM fitment, not harsh over bumps but feel a little slow to respond to steering input. I only paid £176 for the set of 4, which represents excellent value. I'll use them until April this year and next winter. I'll probably change them for a premium winter tyre like the Dunlop if I still own the car in a couple of years.
March 20, 2014
Given 89% while driving a BMW e60 530i (225/50 R17 V) on a combination of roads for 6,000 average miles
I got these for my E60 BMW to improve the winter and snow handling. They perform well in the snow, and icy conditions. No evidence of wear after 6000 miles. Wet grip not as good as wider (premium) summer tyres, when the temperature is above 15 degrees Celcius.
November 26, 2013
Given 77% while driving a Ford S Max (225/45 R17) on a combination of roads for 20,000 average miles
A good all round winter tyre. Have run two sets on two cars. Excellent on snow and slush, good on ice.
A little noisy at motorway speeds. Frankly some of the reviews are worthless, these are winter tyres and the boy racers should drive accordingly. Drivers like these show their lack of knowledge and experience in winter driving.
These tyres are put on in November until April, run on untreated rural roads they are a Godsend for snow particularly getting started on slopes. Positive steering response, good braking performance.
Drive accordingly and these tyres will not let you down.
November 11, 2013
Given 23% while driving a Alfa Romeo MiTo (195/55 R16) on a combination of roads for 200 easy going miles
I am a car enthusiast , and drive a sevens type car and so feel have some idea how a car handles on the limit(and sometimes beyond!). FOr my daily runner I have a 95hp mito, and generally trundle to and from work, and when tires are due for it, I usually go for budget tires. Generally I have never had any problems with ordinary driving with cheap tires. I bought the sunnys because they were the cheap ones the tire place had at the time.

With sunny tires I would say they are very safe, providing you make it round the first few corners in the wet alive. This is in immediate comparison,in the the wet, to the 28000 mile pirellis on the wear limiters with no shoulders left, that were replaced. In the wet or in greasy conditions it feels like you are driving on patchy ice, and therefore in such conditions one has to drive like an undertaker. The steering is very light, no feedback. Noise is actually ok. I hope they will improve a bit as they bed in, but current wet/greasy grip very very poor.

DO NOT BUY THESE TIRES. For budget tires lokk elsewhere nankangs, accelera, generals etc.
October 4, 2013
Given 43% while driving a Saab Automobile 9 3 Vector Sport TiD 150 Saloon (225/45 R17 V) on mostly motorways for 9,000 average miles
These tyres are brander as Sunny Snowmaster and I bought them for my Saab 9:5 1.9TiD to use over the last winter as I would be travelling frequently to Aberdeen and expected to be driving in snow. I was correct, it has been particularly bad this year and in snow they were good. I felt confident and was never stuck. However on damp or greasy roads especially on warmer days (10C+) they had little traction and the traction control frequently had to cut in to keep me going. I was never over-confident when breaking in the wet but had no issues with aquaplaneing. Also the tyres are very noisy with a constant hum at motorway speed. I will be glad to change them next week for normal tyres and even though they are hardly worn after 9,000 miles I will buy a better make next winter as, even though they are not perfect, they convinced me about the benefits of winter tyres when driving in the north of Scotland in winter.
March 20, 2013
Given 61% while driving a Audi A6 Allroad 2.5 (225/45 R17) on mostly country roads for 65,983 average miles
This kind of tyres is more for mud and snow.. M+S type. I drive on gravel every day 2 years when rain was mud... by the way... it's a 4x4 car.. and for snow this tyres are very good for traction.. but not for break.
October 30, 2012
Given 30% while driving a SEAT Ibiza Cupra TDi (205/40 R17) on mostly country roads for 10,000 average miles
Absolutely awful in the wet. In the dry they are spongey and provide no feedback, but aren't too noisy and made my car ride softer which isnt a bad thing, but made dry roads a chore and driving miserable as they ruined my cars handling. I expect some drop in handling with winter tyres, but the performance of these is pathetic.

Overall they are dangerous and down right scary and unless purchased when they are cheap in the summer, they are really expensive.

In deep snow and ice they are ok, but not at all amazing and the dismal performance in all other conditions makes them a real waste of money.

DO NOT BUY THEM! I only did as was expecting loads of snow and due to the size of my wheels I was limited in my choice.

Seat Ibiza Cupra TDI

July 24, 2012
Given 54% while driving a Ford fiesta st (225/45 R17) on mostly country roads for 4,000 average miles
Okay - so I fitted these to a 185bhp/165ftlb modified Fiesta ST on Bilstein suspension/H&R springs - it also has a Quaife ATB differential. This car on summer tyres is normally glued to the road. After some scary experiences in the snow last winter I decided to get a set of these Sunny's (from mytyres) on for this winter.

Well, so predictibly we had no snow! On cold, dry mornings the tyres seem to grip fine. I certainly have no desire to drive like a hooligan in the cold weather but I'd say the grip was Adequate/Good. But, there's no real feedback from them and they feel 'squashy' I guess the sidewalls are quite soft.

In the rain (ie. proper falling drops) again the tyres were Fair - perhaps on a par with the Toyo T1Rs in the rain. That 'squashy' feel doesn't inspire you with any confidence to push on anyway which probably keeps on from finding what the limit is in the wet.

Where these tyres really fall down, and in a scary dangerous way, is on the sort of surface we've had for about 75% of the winter. Damp (but not raining), greasy roads. These tyres will wheelspin with only the very lightest of throttle input, which you can get used to but it slows progress. More disturbingly I've had 2nd gear/10-15mph corners on trailing throttle severe understeer. This with no warning or feedback, mid corner the front just breaks and you're sliding. For this reason I would NEVER RECOMMEND this tyre to anyone - an unexperienced driver would find these tyres sending them into the path of oncoming cars and into ditches.

I can't comment on the snow capabilities of these tyres as I didn't get any - typical - they might be great for that. But, for damp and greasy roads these tyres are treacherous.
February 24, 2012
Given 33% while driving a Vauxhall Vectra (215/50 R17 V) on a combination of roads for 2,000 average miles
Have run these for nearly 2k miles since November. Wet roads - useless. Turning or accelerating on a roundabout/leaving a junction - scary. I dont have Traction control, but a 1.8 Vectra should not wheelespin in 3rd at 30-40 mph!Truly awful, and only passable in the light snow we have had. Lateral control is the worst. Might be ok for some cars but if you have a 1.8SRI Vectra - avoid - ruins the car, and only for those with a deathwish.
February 22, 2012
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