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Dunlop Direzza Sport Z1 Star Spec

The Dunlop Direzza Sport Z1 Star Spec is a Extreme Performance Summer tire designed to be fitted to Passenger Cars.

6.4
Tire Reviews Score Based on User Reviews
Limited Confidence View Breakdown
Dry Grip
92%
Wet Grip
83%
Road Feedback
88%
Handling
88%
Wear
77%
Comfort
82%
Buy again
95%
6 Reviews
86% Average
39,095 miles driven
Dunlop Direzza Sport Z1 Star Spec

Dunlop Direzza Sport Z1 Star Spec

Summer Premium
BETA
6.4 / 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: 6
Avg Rating: 86.4%
Min Required: 5
Consistency
Weight: 5%
Score Std Dev: 0.12
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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Top 3 Dunlop Direzza Sport Z1 Star Spec Reviews

Given 76% while driving a Audi A4 Quattro 220 bhp TFSI (225/45 R17 W) on mostly town for 10,000 average miles
Dry grip is good, but not good on wet especially Hong Kong. we have to replace it around every 24000KM.
July 23, 2013
Given 84% while driving a Suzuki Swift 1.5 (225/45 R17) on a combination of roads for 80 average miles
Had used many different brands and models of tires.
Till date, this tire at its price is one of the best performances for me.

November 20, 2012
Given 81% while driving a Honda Integra DC2 (205/55 R15 V) on mostly country roads for 7,000 spirited miles
Good all round fast road tire, low wear, stiff sidewall, nice quality.
March 5, 2012

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Latest Dunlop Direzza Sport Z1 Star Spec Reviews

Given 94% while driving a Holden SS Commodore (255/40 R17 W) on mostly motorways for 15 spirited miles
Apart from the tires being difficult to balance well and needing a good bit more weights added on the wheels that the string of Bridgestones (B530,So2,RE-050 & RE-050A) never needed or had problems with, and they had more road noise, they provided a good bit more grip and for spirited driving & the car was nicer to drive with an absence of tire squeal when cornering. Would buy again if the quality control could be improved re. balancing issues.
October 25, 2011
Given 83% while driving a Peugeot 406 Coupe SE (3.0 ltr V6) (215/55 R16 W) on a combination of roads for 15,000 spirited miles
Had these fitted as a mid-ranged (price-wise) performance tire. The tires gave very good to excellent grip on most road surfaces in most conditions even when the car was being driven hard. Versus the OEM Michelin Pilot tires there was a slight decrease in road noise, improved handling, gip and feedback. The only downside was wear out more rapidly than the OEM tires (and also versus other performace tires which I have used on other cars) However as they cost me significantly less than the Pirelli P-Zero/Goodyear Eagle F-1/Bridgestone Potenzas that I also been considering it was a reasonable trade-off.
March 15, 2011
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