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Hankook Optimo K406 View Gallery (1)
225-255/60-70 R16-18 3 sizes 2021

Hankook Optimo K406

Hankook Tyres Touring Summer

The Hankook Optimo K406 is a Touring Summer tyre designed to be fitted to Passenger Cars.

6.0
Tyre Reviews Score Based on User Reviews
Limited Confidence View Breakdown
Dry Grip
90%
Wet Grip
83%
Road Feedback
87%
Handling
61%
Wear
66%
Comfort
66%
Buy again
66%
9 Reviews
74% Average
223,964 miles driven
Hankook Optimo K406

Hankook Optimo K406

Summer Premium
BETA
6 / 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: 0
Publications: 0
User Reviews
Weight: 15%
Reviews: 9
Avg Rating: 74.2%
Min Required: 5
Consistency
Weight: 5%
Score Std Dev: 0.17
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
All Tests

Sorry, we don't currently have any magazine tyre tests for the Hankook Optimo K406

Size Fuel Wet Noise
16 inch
225/70R16 103 H D C 71
17 inch
235/60R17 102 H D D 70
18 inch
255/60R18 108 H C D 71
View All Sizes and EU Label Scores for the Hankook Optimo K406 >>

Questions and Answers for the Hankook Optimo K406

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Top 3 Hankook Optimo K406 Reviews

Given 43% while driving a Ford Fusion 1.4 TDci (195/60 R15) on a combination of roads for 22,000 easy going miles
These came as OE. At just over 22,000 miles on mixed roads, I've had to replace the front tyres and will have to replace the rear ones in about 2k miles. Obviously a dreadful performance.

They were ok on dry roads, noisy on motorways and just felt 'thin', every little bump was registered. I wasn't too happy when, for the first time in a 40yr driving career, I skidded doing c.15mph round a lightly icy bend. I never felt exactly comfortable in wet weather, nothing I could definitively point to, just 'thin'.

I replaced these tyres with Firestones (77K warranty) - the difference all round is very marked. I'll never bother with Hankook again.
Helpful 690
April 18, 2015
Volkswagen (195/60 R15 T) on a combination of roads for 80 average miles
Great tyres ,and will always ask a tyre fitter if they stock Hankook before I consider buying any tyres of any other brand. My Sharon is a heavy car 1250 kg and these tyres work hard.
Helpful 608
April 22, 2016
Given 85% while driving a Hyundai Getz (185/55 R15 H) on mostly town for 84 average miles
Had them on car at purchase, mileage was 4,000. It is now 88,000 kms and just needing to change all four tyres. Never had any problems with the tyres, always handled ok. Mostly town driving not touring. Garage offered us Hankook tyres as the cheapest option, saying the harder rubber was better for the in town driving we mainly do. We were skeptical about buying cheap tyres from a brand we did not know, until we realised that we had been driving Hankooks all along. So yes, we would buy them again.
Helpful 632
May 16, 2015

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Latest Hankook Optimo K406 Reviews

Given 91% while driving a Hyundai Tucson (235/60 R16) on a combination of roads for 30,000 easy going miles
I'had like to buy this same tyre again
Helpful 614
November 28, 2014
Given 100% while driving a Hyundai Tucson (215/65 R16 H) on a combination of roads for 32,000 easy going miles
I have 32000 miles and there is still 4mm left on each tyre. I highly recommend these but I think Handcock no longer make this type of tyre. It has been replaced by another.
Dave
Helpful 669
October 20, 2013
Given 76% while driving a Chevrolet Lacetti (195/55 R15 V) on mostly town for 15,000 easy going miles
Hi

Supplied as OE on the car and I do find them noisey.I am not that happy with the wear but have swung the tyres Front to back so see what happens.All the above is subjective in that I have only driven this car with the OE tyres.
Helpful 585
May 9, 2013
Given 64% while driving a Ford Fusion 1.4 TDci (195/60 R15 T) on a combination of roads for 33,800 average miles
Came on the car when I purchased it new. They are good value, more noise then i expected, got good mileage from them, replacing them with Conti EcoContact 5.
Helpful 638
March 6, 2013
Given 53% while driving a Kia Motors Picanto (225/45 R17) on a combination of roads for 56,000 spirited miles
These tyres have great grip, combined with my hard suspension I get to go around corners pretty well. However I have had three sets of these tyres already and my car isn't even over the 90 000km mark yet, the wear is terrible. For each set I have gotten bubbles in the sidewalls of the tyres within the first 4-6months at first I replaced these tyres but it was getting to be very expensive. The only reason I kept rebuying these tyres is because it is the only brand that fits my rim size, it will cost me the same to replace both my rims and tyres with continetals than it would cost to rebuy a set of 4 tyres.So that is what I am doing next.
Helpful 650
July 9, 2012
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