Menu

Double Coin DC99

The Double Coin DC99 is a Touring Summer tyre designed to be fitted to Passenger Cars.

4.0
Tyre Reviews Score Based on Professional Tests
High Confidence View Breakdown
Dry Grip
10%
Wet Grip
10%
Road Feedback
10%
Handling
10%
Wear
35%
Comfort
20%
Buy again
10%
2 Reviews
15% Average
3,200 miles driven
5 Tests (avg: 36th)
Double-Coin DC99

Double-Coin DC99

Summer Budget
BETA
4 / 10
Based on Professional Tests · High 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
85.3
0.42x / 9 tests
Comfort
72.5
0.32x / 6 tests
Dry
47.6
1.8x / 9 tests
Wet
40
2x / 18 tests

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

Braking
44.9
11 tests
Handling
40
8 tests
Score Components
Professional Tests
Weight: 80%
Tests: 5
Publications: 3
Period: 2021 - 2024
User Reviews
Weight: 15%
Reviews: 2
Avg Rating: 15%
Min Required: 5
Consistency
Weight: 5%
Score Std Dev: 0.74
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
2024 Summer Tyre Market Overview Auto Bild 2024 205/55 R16 54/55 2 metrics
Are Budget Tyres Finally Good Enough? 8 Cheap Tyres VS 1 Premium Tyre Tyre Reviews 2023 205/55 R16 9/9 13 metrics
2023 ADAC Summer Tyre Test ADAC 2023 205/55 R16 49/50 12 metrics
Tyre Reviews Best Summer Touring Tyres Tyre Reviews 2023 205/55 R16 13/13 13 metrics
2021 53 Summer Tyre Braking Test Auto Bild 2021 205/55 R16 53/53 2 metrics

Videos

Are Cheap Tires FINALLY Good Enough To Use? The Best Budget Tyres Tested

Are Cheap Tires FINALLY Good Enough To Use? The Best Budget Tyres Tested

The Best Tires for Your Car? 13 Brands Compared and Rated!

The Best Tires for Your Car? 13 Brands Compared and Rated!

5
Tests
36th
Average
9th
Best
54th
Worst
Latest Tyre Test Results
54th/55
13th/13
Low external noise.
Dangerously low levels of grip in the wet with extremely long wet braking distances, worst aquaplaning resistance, very low grip in the dry with poor balance, high rolling resistance.
In last place by a landslide was the Doublecoin DC99. If you want a tyre that is extremely quiet for the people you drive past, this is the tyre for you. For anything else, this is not the tyre as it lost every other category we tested it in, most noticeably taking 14 meters longer to stop the car from just 80kph in the wet. That means when you were stopped on the Continental, you were still doing 45kmh on the Doublecoin. Go run into a tree at 45kmh and tell me that's worth saving a bit of money on your tyres.
The DoubleCoin DC99 was the cheapest tyre on test, and had the lowest noise and mid-pack rolling resistance, but every other test it was last, with the worst wet grip by far. Definitely a tyre to avoid, even if it is the cheapest tyre of the test.
Size Fuel Wet Noise
16 inch
205/55R16 91 V C C 70
205/60R16 92 V C C 70
215/60R16 95 V C C 71
215/60R16 95 H C C 71
205/55R16 91 V C C 70
215/60R16 95 H C C 71
215/60R16 99 V XL C C 71
205/60R16 92 V C C 70
215/60R16 95 H C C 71
17 inch
225/50R17 94 V C C 71
View All Sizes and EU Label Scores for the Double Coin DC99 >>

Questions and Answers for the Double Coin DC99

Ask a question
Sorry, we don't currently have any questions and answers for the Double Coin DC99. Why not submit a question to our tyre experts using the form below!
Ask a question

We will never publish or share your email address

captcha

To verify you are human please type the word you see in the box below.

How would you rate the Double Coin DC99?

Click a star to start your review

Latest Double Coin DC99 Reviews

Given 14% while driving a Opel insignia (225/55 R17) on a combination of roads for 3,000 average miles
It came with the car when I bought it, it's on front axle, I had a few cars with different tyres, but these are the worst.
It should be illegal on public roads.
Very very little grip.
May 24, 2025
Given 16% while driving a Opel (225/55 R17) on a combination of roads for 200 easy going miles
No grip, even on a dry surface.
January 2, 2024
Rate the Double Coin DC99