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Sunny SN3800

The Sunny SN3800 is a High Performance Summer tyre designed to be fitted to Passenger Cars.

3.4
Tyre Reviews Score Based on User Reviews
Limited Confidence View Breakdown
Dry Grip
50%
Wet Grip
29%
Road Feedback
30%
Handling
29%
Wear
44%
Comfort
28%
Buy again
19%
63 Reviews
33% Average
256,716 miles driven
2 Tests (avg: 33rd)
Sunny SN3800

Sunny SN3800

Summer Economy
BETA
3.4 / 10
Based on 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
Score Components
Professional Tests
Weight: 80%
Tests: 2
Publications: 2
Period: 2010 - 2012
User Reviews
Weight: 15%
Reviews: 63
Avg Rating: 32.8%
Min Required: 5
Consistency
Weight: 5%
Score Std Dev: 0.19
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
2012 Autobild 50 Tyre Braking Test Auto Bild 2012 225/45 R17 48/45 0 metrics
2010 European Summer Tyre Test ADAC 2010 225/45 r17 17/16 0 metrics
2
Tests
33rd
Average
17th
Best
48th
Worst
Latest Tyre Test Results
48th/45
17th/16

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Top 3 Sunny SN3800 Reviews

Volkswagen Transporter (255/45 R18) on a combination of roads for 2,000 easy going miles
Horrendous tyres! We have replaced just about every component on the van, wheel bearings, drive shafts, all to try and cure the horrendous noise coming from under the van to no avail. Once there was nothing left to replace we tried another set of tyres and found our problem. We also found a bulge in the wall. They handle ok both in wet and dry, a bit sluggish, but even if they gave a perfect ride we would still bin them.
June 22, 2020
Given 20% while driving a Ford Kuga (235/50 R18 V) on a combination of roads for 3,000 miles
The worst tyres I ever bought. They only lasted 4 month 3k miles. Uneven wear on inner edge, feathered o cupped. Road noise is horrendous plus vibration. They still looks like new but undrivable. Suspension has been checked 3 times in a different garages, 3 times 4 wheel alignment done, everything is fine. So must be tyres. So going to buy decent tyres now.
November 5, 2018
Given 26% while driving a BMW 520d Tourer (225/45 R17) on mostly motorways for 500 average miles
Appalling.The worse tyres I have ever experienced, I would go aso far as to say they were dangerous. The car dances all over the place on the motorway, requires constant directional correction. They drift when crossing the white lines and the traction control cuts in on even moderate bends.
I have had them for 500 miles and they are going in the bin. Shocking.
June 4, 2017

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Latest Sunny SN3800 Reviews

Ford F 150 (305/30 R26 R) on mostly town for 15,000 easy going miles
Used these on my 26 inch wheels on my truck and they have about 90 percent tread left on them since i only use them 3 months of the year and i have now noticed weather cracks all over them . I have had them for around 4 seasons . Always garage kept. Ive put no more then 15 thousand miles on them. But i guess u get what i pay for . Dont buy these . Spend a little more and get more .
July 6, 2016
Given 10% while driving a Ford Fairlane NL (225/45 R17) on mostly town for 0 average miles
bought it from fawkner , in two month worn out , absolutely unbeliever , shop owner dont wanna know
April 27, 2016
Check out how the BEST all seasons tyres perform against premium summer and winter tyres!
Given 53% while driving a Audi A4 2.0 TDi 170 S Line (225/45 R17) on a combination of roads for 6,000 easy going miles
Only lasted 6000 miles then developed a bulge on the tread, absolute rubbish
February 25, 2016
Given 77% while driving a Chrysler PT Cruiser (225/45 R17) on mostly motorways for 15,000 average miles
My car certainly is not a luxury model nor particularly sporty. For a low price and attractive tread pattern these certainly fit my criteria and have met my expectations. I don't deny that they may be noisy but not so loud as some purport. For those who claim loss of wet pavement control, my thought is they have one or more tires installed against the directional tread design. This would cause water to accumulate under the tire rather than be expelled.
February 2, 2016
Given 37% while driving a Mitsubishi Colt (195/45 R15) on a combination of roads for 5,000 spirited miles
I've never driven on a worse tyre. These things will slide all over round roundabouts in the rain and need the abs to kick in when braking moderately from 20mph in the cold (3 degrees ish) even when only mildly damp.

I immediately noticed the noise difference they made when fitted, they are loud.

I got all 4 tyres for free, only a £40 fitting cost, and they still weren't worth the money. All 4 have now been changed to semi slick tyres for trackdays, and even they handle significantly better in the wet and cold.

On the plus side if you can credit one, they are very hard compound so should last a fair few miles. I've done over 5k miles including a half day track session, and still 5-6mm tread left. Just a shame I've had to throw them away!

Don't put a loved one on these tyres!
January 12, 2016
Given 14% while driving a Volkswagen Golf GTi Mk5 (225/40 R18) on mostly town for 100 average miles
Terrible is the one word summary. The drone these tyres made made me certain a wheel bearing had gone. Don't bother buying these tyres! Only put up with them for 100 miles as the previous owner fitted them.
December 10, 2015
Given 31% while driving a Volkswagen Tiguan Sport 2.0 TDI 140hp (225/45 R17) on a combination of roads for 500 average miles
These tyres are hideous. Had two put on after buying my car second hand to get it through an MOT. First time driving at more than 55mph I was convinced the rear diff or wheel bearings were shot. Had the car checked out and no one could find anything wrong. It was whilst speaking to one mechanic and he asked when did you get those tyres fitted..BINGO! The wet weather performance is scary. These are just cheap, nasty copies of tyres and in my opinion should not be sold.
Don't buy they are a waste of money.
August 24, 2015
Given 17% while driving a Ford Focus mk2 (205/55 R16 W) on a combination of roads for 1,500 average miles
should never be put on a car, total noisy rubbish
May 24, 2015
Given 24% while driving a Ford Kuga (225/45 R17) on a combination of roads for 6,000 average miles
New tyres fitted when I purchased my car,March 2014 , I have done 6000 miles and the tyres have cracked i between the treads and are just rotting away, the are on the front of my ford kuga. Not recommended at all.
March 9, 2015
Given 14% while driving a Toyota (225/45 R17) on a combination of roads for 75 easy going miles
Fantastic tyre.....to keep on your spare wheel. Honestly with one of these things on your car, such is the noise they create that you will be constantly reminded to get your blown tyre repaired or replaced asap. That's the only positive as far as I can see.
January 9, 2015
Given 33% while driving a BMW 330d M Sport (255/35 R18) on a combination of roads for 20,000 average miles
The first thing you notice with the Tyres they look very attractive but they are completely useless in the wet dont try and corner at 30 mph you will spin round or crush. They are very noisy you may think there is something wrong with the wheel bearing especially at low speeds. The tire compound is very hard and they dont wear quickly i have done 20,000 miles and they still look like new but i will never use them ever again
October 8, 2014
Given 44% while driving a BMW 330ci (230/40 R17) on mostly motorways for 1,500 average miles
Very noisy tires. In wet they are dangerous and very poor performance. My BMW 330ci flashed all the time DSC light.
September 23, 2014
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