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Bridgestone Turanza GR80

The Bridgestone Turanza GR80 is a Touring All Season tire designed to be fitted to Passenger Cars.

6.0
Tire Reviews Score Based on User Reviews
Limited Confidence View Breakdown
Dry Grip
65%
Wet Grip
70%
Road Feedback
62%
Handling
58%
Wear
60%
Comfort
80%
Buy again
72%
6 Reviews
67% Average
98,200 miles driven
Bridgestone Turanza GR80

Bridgestone Turanza GR80

All Season Premium
BETA
6 / 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: 66.7%
Min Required: 5
Consistency
Weight: 5%
Score Std Dev: 2.41
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 Bridgestone Turanza GR80 Reviews

Given 43% while driving a Toyota Innova (205/65 R15) on a combination of roads for 25,000 average miles
The Tire treads wear off much faster. I have used the original brand new tires for just 25000 Kms and the treads are already worn off. There are leaks from the nicks and cuts on rough roads and hence I have to inflate the tire every 5 days. No punctures detected. Very dissatisfied with performance.
The tire grips now after 2 years is quite poor.
July 24, 2013
Given 89% while driving a Honda Accord (225/45 R17) on mostly town for 20,000 average miles
Its was the best of all tire i had used.
July 29, 2012
Given 32% while driving a Chevrolet Lumina SS (225/45 R17) on mostly country roads for 200 average miles
It was the last time to buy any bridgestone product
April 24, 2011

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