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Dayton D320 View Gallery (1)

Dayton D320

Dayton Tires High Performance Summer

The Dayton D320 is a High Performance Summer tire designed to be fitted to Passenger Cars.

6.2
Tire Reviews Score Based on User Reviews
Limited Confidence View Breakdown
Dry Grip
73%
Wet Grip
55%
Road Feedback
54%
Handling
44%
Wear
49%
Comfort
63%
Buy again
47%
11 Reviews
55% Average
139,725 miles driven
Dayton D320

Dayton D320

Summer Economy
BETA
6.2 / 10
Based on User Reviews · Limited Confidence · Updated 23 Feb 2026

The Tire Reviews Score is the most comprehensive tire 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: 11
Avg Rating: 54.9%
Min Required: 5
Consistency
Weight: 5%
Score Std Dev: 0.11
History Points: 10
Methodology & Configuration
Scoring Process
  1. Collect Test Data: Gather results from professional tire 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

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Questions and Answers for the Dayton D320

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Size Price Range  
Available in 1 tire sizes - View all.

Top 3 Dayton D320 Reviews

Given 43% while driving a Nissan Nissan Xtrail Techna T31 (225/45 R17) on mostly country roads for 25 easy going miles
Nissan XTrail 25,000 klms 2 years. Tires worn out needed replacing
Helpful 761
November 11, 2024
Given 16% while driving a Toyota Estima Aeras G (235/40 R18) on mostly town for 0 easy going miles
Very slippery when wet and not safe.
Helpful 667
April 24, 2024
Fiat (185/55 R15) on a combination of roads for 0 average miles
Not at all impressed with the wear on these Dayton tires! Premature cracking all over on all tires, not seen anything like this before on branded new tires only 18 months in. Tire fitters on the record tell me its to do with the silicon compound within the tires & they are sound, off the record they tell me the tires have lost there stability & they are crap! Don't buy Dayton tryes, why Bridgestone put there name to these I'll never know!
Helpful 721
July 24, 2021

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Latest Dayton D320 Reviews

Given 24% while driving a Toyota Camry (225/45 R17) on mostly town for 3,000 average miles
half of the tread has gone only after 5000km. Skip in wet day. The worst tire I haved used.
Helpful 901
November 28, 2018
Given 69% while driving a Ford Mondeo Titanium 2.0 TCDI (205/55 R16 H) on a combination of roads for 8,000 average miles
Overall medium to good tire. Price is great. Not for sporty drive but normal drive. Noise from tire over 80 km/h and increasing whit speed.
Helpful 560
April 7, 2017
Check out how the BEST all seasons tires perform against premium summer and winter tires!
Given 49% while driving a Honda Civic 1.8 (225/45 R17) on mostly town for 700 average miles
Since I have 2 of them on my front wheels my car goes right and it goes left but doesn't want go straight. It demands full time steering control which is most tiering on motorways.
Helpful 836
April 29, 2016
Given 77% while driving a Renault Megane I coach 1.6e (185/55 R15 T) on mostly town for 30,000 spirited miles
I had the Firestone Firehawk D320, which are now made by Dayton, the quality is the same. The tires were really good for my style of driving, quite aggressive with a lot of maneuvers, on a 90bhp car. The tires had excellent grip in the dry and I never lost grip in the wet, despite entering some corners pretty wildly :D
The wear was decent, considering the amount of braking and cornering.
For a sporty type of driving you don't care about comfort or noise, but for me they were quite OK on this department.
I will certainly buy them again and recommend them.
Helpful 488
June 3, 2014
Given 78% while driving a Renault Laguna 3 (225/55 R16) on mostly motorways for 3,000 easy going miles
I am using those tires on my Renault Laguna III phase 2 for about 6 months. Easy going highway driving, destinations Sarajevo-Sofia-Istanbul, Sarajevo-Geneva, Sarajevo-Athens, or Sarajevo-Sofia-Bucharest. Do not get me wrong, I am very law obeying driver, no sanctions for the last 15 years at all, I keep the speed limits, and I seldom speed more than 140 km/h, sorry, this is my style. Have to replace my winter "Continentals", and the local garage in Sarajevo offered me this brand. Price is ~75.00 E/piece, mounting + balance included. Driving is perfect in dry or wet on highways, a bit more "bumpy" than my old Summer "Bridgestone Turanza"s, but this is felt exclusively out of highways only. Handling is good, fuel consumption in average is a bit higher than the Bridgestones", but not heavily damaging my pocket. I am leaving "progressiveness" & "wear" boxes just empty, cannot make a fair judgement for just couple of weeks. Also "by again" is empty - I like this brand, but could be that a cheaper brand will appear soon in my garage's stock, who knows? Bottom line - reliable tire with great price/quality ratio.
Helpful 554
June 1, 2014
Given 64% while driving a Ford Probe GT (205/60 R15) on a combination of roads for 20,000 average miles
Dry grip is nearly perfect. Sidewalls a little soft and wobbly. When it rains, the grip is easly lost.
Helpful 560
October 8, 2011
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