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Bridgestone Turanza ER300 RFT

The Bridgestone Turanza ER300 RFT is a Premium Touring Summer tire designed to be fitted to Passenger Cars.

6.4
Tire Reviews Score Based on User Reviews
Limited Confidence View Breakdown
Dry Grip
66%
Wet Grip
57%
Road Feedback
67%
Handling
67%
Wear
70%
Comfort
65%
Buy again
57%
11 Reviews
64% Average
254,040 miles driven
Bridgestone Turanza ER300 RFT

Bridgestone Turanza ER300 RFT

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: 11
Avg Rating: 64.4%
Min Required: 5
Consistency
Weight: 5%
Score Std Dev: 0.05
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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Size Price Range  
275/40 R18 $428.96 - $428.96 (1 Price) Compare Prices >>
Available in 4 tire sizes - View all.

Top 3 Bridgestone Turanza ER300 RFT Reviews

Given 80% while driving a BMW 520D M Sport Touring (275/40 R18) on mostly motorways for 30 average miles
I'm using them on my BMW 520d G31 M Sport, quite happy with those tires and maybe because I drive a lot on the motorway (normal driving) lasted over 50k miles on the front (245/45/18) and over 30k on the rear (275/40/18). Pretty noisy on the road (run flat...) and not very good on wet, but I'm definitely going to use them again.
October 16, 2022
Given 70% while driving a BMW 520d (225/55 R17 W) on mostly motorways for 36,000 easy going miles
OEM fitted wheels and just need replacing due to wear - lasted 36,000 miles and still 2.5 mm left, but thinking of replacing them for the winter. Good comfort for RFT's, dry grip is decent, wet grip is average - zero grip in any sight of snow but that's with all rear wheel drive BMW's.
October 11, 2018
Given 50% while driving a BMW 118i Sport (205/55 R16 W) on mostly town for 18,000 average miles
Rubbish tire ever! don't understand why BMW F20 118i chose this tire. Even on dry rode, the grip is terrobile, causing two accidents to my 118i. Under wet condition, the grip is nearly zero under noramal draiving style, with ESP flashing from time to time.
June 4, 2018

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Latest Bridgestone Turanza ER300 RFT Reviews

Given 41% while driving a BMW 218d Active Tourer (225/55 R17 W) on mostly motorways for 40,000 easy going miles
When I bought my car these tires were fitted. Only afterwards I learned that BMW delivers some of their cars with runflats as standard. While I was excited in the beginning to learn and feel the runflats, I was dissapointed overall.
While dry grip is average compared to non-RFTs there is no wet grip. One of the worst summer tires in wet/muddy conditions I ever drove. All the rest seemed very average and definately lower performance than all the Pirellis, Contis, and Michelins that I drove (although non-RFTs). They are noisy and very hard. Wear is rather OK.
Compared to their RFT successors (Bridgesote Driveguard) you can really forget about this tire. The RFT technology has improved. This tire I would not recommend due to its wet grip weakness.
January 21, 2018
Given 31% while driving a BMW 530D (245/45 R18 W) on mostly country roads for 12,000 easy going miles
Not happy with levels of grip especially in the wet also they give a harsh ride. Tires need replacement after only! 12,000 miles of average driving on mixed roads.
Currently looking for replacement but as the car requires run flat tires the choice is limited and EU labelling indicates theses Bridgestones are the best. whoever invented run flat tires should be ashamed of themselves, wish I could use standard tires but can't as car is designed for run flat tires and also insurance would not provide cover with a change to standard tires.
August 17, 2014
Check out how the BEST all seasons tires perform against premium summer and winter tires!
Given 57% while driving a BMW 120d (225/55 R16 W) on mostly town for 13,000 spirited miles
I bought the tires when I bought the car 2nd hand. I had come down to the 120d from a 523i where I had 235/45/17s but a much larger/heavier car, no runflats and my own choice of unidirectionals. Grip is lower on the 120d, as well as less progressive and decidedly impossible in snow (as the Potenza review), and after just 13000 miles my rears are almost down to the wear markers. The car has caught me out twice recently, but luckily I wasn't driving fast and the ASC kicked in. I am looking for replacements but there's not really much choice in RFTs is there?!
February 10, 2011
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