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Firestone TZ100 View Gallery (1)

Firestone TZ100

Firestone Tires High Performance Summer Next

The Firestone TZ100 is a High Performance Summer tire designed to be fitted to Passenger Cars.

6.1
Tire Reviews Score Based on User Reviews
Limited Confidence View Breakdown
Dry Grip
71%
Wet Grip
60%
Road Feedback
65%
Handling
63%
Wear
59%
Comfort
49%
Buy again
38%
8 Reviews
58% Average
190,000 miles driven
Firestone TZ100

Firestone TZ100

Summer Mid-Range
BETA
6.1 / 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: 8
Avg Rating: 57.7%
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 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

Sorry, we don't currently have any magazine tire tests for the Firestone TZ100

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Top 3 Firestone TZ100 Reviews

Given 20% while driving a Toyota Prius (225/45 R17) on mostly town for 25,000 average miles
Hard as stone, not for cars
Helpful 646
December 22, 2019
Given 36% while driving a Honda Accord (205/60 R16 V) on a combination of roads for 30,000 average miles
Terrible handling in the wet, they just don't grip without much road feedback. Hard ride, not quiet - just don't buy it. Replaced with Pirelli P1 Cinturatos which are grippier with more feel, and also more comfortable.
Helpful 482
June 6, 2015
Given 69% while driving a Subaru Liberty RX (225/45 R17) on mostly country roads for 25,000 average miles
I had these new, on my 02 Subaru Liberty RX when I bought it in 2010.Regardless of the fact that I regularly checked tire pressures,the sides wore out on them at only 25000klms.Found they had good grip in the dry and wet but there are better tires out there for the same price or less.Recommend Hifly HF805 91W as an option.
Helpful 489
October 14, 2014

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Latest Firestone TZ100 Reviews

Given 47% while driving a Honda Accord (195/45 R14 H) on track for 23,000 average miles
Tires r ok cheap for 5 tires costs around 300 euros
Helpful 460
September 29, 2014
Given 67% while driving a Subaru Liberty RX (225/45 R17) on mostly country roads for 50,000 average miles
Haven't used any other tire since buying the 02 Subaru Liberty RX running 205 50 16.Replacing with Khumo KH 31 as tey have a better reviews.Disapointed that all four tires wore out on the sides despite checking tire pressures constantly.Felt that they were noisy on concrete freeways but couldn't complain about grip on wet or dry roads.Would buy again but there are better tires out there for the same money.
Helpful 452
March 3, 2012
Given 81% while driving a Jaguar S type 3.0 (225/45 R17) on a combination of roads for 3,000 average miles
Earlier I wrote of my problems with the TZ 100 tires On my S type Jaguar being noisy on smooth roads particularly from the rear, in my cars case the left rear.
Well I now owe the Firestone TZ100 a big apology, getting ever more frustrated with the noise (local mechanic could find no mechanical fault causing said noise)I took the Jag to the Main Jaguar dealership.
The Jaguar technician found the fault in no time,it was not the tires causing the noise but the right rear wheel bearing! So TZ 100'S I truely sorry!.The moral of the story is even though the main dealerships charge like a wounded bull for their services, they do save you a lot of grief in the long run.
Helpful 477
November 14, 2011
Given 54% while driving a Jaguar S type 3.0 (225/55 R16) on a combination of roads for 2,000 average miles
Hi Tires are actually Firestone Firehawk TZ100 (not shown on list)Tires are generally good but road noise from the rear is unacceptable.Had one tire replaced but unacceptable noise returned after 1000 km.Had no road noise from the original pirelli 6000's.
Helpful 492
September 3, 2011
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