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Sumitomo H/TR Z III View Gallery (1)

Sumitomo H/TR Z III

Sumitomo Tyres Ultra High Performance Summer

The Sumitomo HTR Z III is a Ultra High Performance Summer tyre designed to be fitted to Passenger Cars.

7.4
Tyre Reviews Score Based on User Reviews
Limited Confidence View Breakdown
Dry Grip
87%
Wet Grip
80%
Road Feedback
85%
Handling
80%
Wear
82%
Comfort
86%
Buy again
83%
14 Reviews
83% Average
149,378 miles driven
Sumitomo HTR Z III

Sumitomo HTR Z III

Summer Economy
BETA
7.4 / 10
Based on User Reviews · Limited Confidence · Updated 23 Feb 2026

The Tyre Reviews Score is the most comprehensive tyre 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: 14
Avg Rating: 83.3%
Min Required: 5
Consistency
Weight: 5%
Score Std Dev: 0.14
History Points: 10
Methodology & Configuration
Scoring Process
  1. Collect Test Data: Gather results from professional tyre 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 Sumitomo HTR Z III Reviews

Given 89% while driving a BMW E46 3 Series (225/45 R17) on a combination of roads for 35,000 spirited miles
Had these on my BMW e46 318ti staggered fitment. Best tyres I had on that car. Note comments apply to car driven in Australia so no real cold sub-zero weather or snow. I got nearly 40000 km out of them with spirited driving mix of suburban and country. Good feedback and handling car felt really well planted on the road. Fantastic grip in the dry and pretty good in the wet. Road noise was ok nothing to complain about. Wear was ok given I could not rotate the tyres due to staggered fitment. Would have happily bought another set if they were available. The massive side guards really stick out and help protect the rims.
Helpful 863
September 30, 2024
Given 83% while driving a Honda Civic Type R (225/35 R19) on mostly motorways for 5,000 spirited miles
Probably more extreme use than most owners will ever see, but ran a set of these on my CTR. Completed 4 laps (with cool down in between) of the Nordschleife. This was back in April, and have ran them since! At present there is minimal wear after nearly 5k of hard driving! Purchased these mainly due to the impressively low price point, but they're definitely on a par with some of the "premium" brands. For a daily driver... highly recommended.
Helpful 368
September 7, 2025
Given 93% while driving a Porsche 911 3.4 (235/35 R19) on mostly motorways for 5,000 spirited miles
Love these tyres. Have them on the front of a 911 and like everything about them. Quiet, solid side wall, great feel through the steering wheel. Would buy again 100%
Helpful 802
December 3, 2022

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Latest Sumitomo HTR Z III Reviews

Given 73% while driving a Volkswagen Golf MK7 GTI (225/40 R18) on a combination of roads for 19,200 average miles
These tyre's worked really well on my Golf mk7 GTI in summer weather conditions. I've used both Good Year Efficient Grip and Falken tyres at the front wheels and I felt them a bit less stable at higher speeds and especially very grippy such that when you brake hard the vehicle used to swerve/float at high speeds, this was not experienced with the Sumitomo. Excellent tyre for handling, this is my second pair at the front. The only downfall is that on hard acceleration there is a lot of spinning as compared to the other brands and the tyre's don't last long.
Helpful 829
June 27, 2022
Given 100% while driving a BMW 320 TDI (225/45 R17 W) on mostly motorways for 20,000 spirited miles
perfect grip. Very good on wet roads
Helpful 862
August 23, 2020
Check out how the BEST all seasons tyres perform against premium summer and winter tyres!
Given 100% while driving a Volkswagen Golf MK7 GTI (225/35 R19 W) on mostly country roads for 10,000 spirited miles
best tyre I ever bought
Helpful 960
August 21, 2020
Given 87% while driving a MINI Cooper S (215/45 R17) on a combination of roads for 18 spirited miles
Running theses on my 2002 MINI S. These tires are perfect for spirited driving and fantastic in heavy rain. I like them so well I'm on my 8th set on this car! I get about 23-28,000 miles on a set. Ran Pirelli (run flats) Kumho, and Coopers. Sumitomo's are by far my favorite. BTW....277,000 miles on my MINI
Helpful 914
July 22, 2019
Given 89% while driving a Ford Fiesta Zetec S (195/50 R15 R) on mostly motorways for 13,000 easy going miles
These tyres are good for price
Helpful 966
December 16, 2018
Given 66% while driving a Kia Motors Forte Koup (225/50 R17 W) on a combination of roads for 50 average miles
they are what they are, a summer tire maybe one of the best in that matter and on wet surface they work very good but the real problem is their side grip on wet surface , you can brake and be sure that they will stop the car in rain on a straight line but if you are not experienced enough their side skiing can make a disaster, trust me many times i felt their side instability not in corners! No, they dont need corners to ski even the change in asphalt materials can make you lose control, As a mechanical engineer I ONLY recommend them if you live in a dry place.
Helpful 903
November 1, 2018
Given 60% while driving a BMW 335i (225/40 R19 W) on a combination of roads for 1,000 spirited miles
I bought this 1month ago and for some reason at first i put these in rear of my car (which should be 255.30.19) and amazingly it was the best tire i ve ever had in my rear axel , it was the best grip i v ever had , and then i found the michelin pss and put these in there right place in front axel , and now these are very bad in cornering and braking , use these tires just in rear of your car
Helpful 664
March 3, 2017
Ford (245/40 R17) on mostly town for 100 spirited miles
I was recommended 245/40/17s by ian diffan and they were incompatible with the traction control as the diameter was incorrect but sumitomo did come to the party and replaced with 245/45/17s that cured the problem but proved not only to be no where near as good for grip or traction as the pirelli's they replaced but look terrible to the point of replacing them within a week to my loss
Helpful 619
July 29, 2016
Given 96% while driving a Nissan GT R (265/35 R18) on mostly country roads for 10 spirited miles
Excellent dry and wet grip, very predictable tyre. Would certainly buy again.
Helpful 623
June 9, 2016
Given 63% while driving a Mercedes Benz C32 AMG (255/35 R18 W) on a combination of roads for 1,000 spirited miles
Reasonable grip in the dry for the price, quite and comfortable. Diabolical in the wet. Traction control cannot keep these things on the road. I'd fit these to an awd or low powered rwd but 350hp+ at the rear is shows these tires limitations very quickly.
Helpful 594
September 20, 2014
Given 80% while driving a Subaru Impreza WRX STI (225/45 R17 W) on a combination of roads for 40,000 average miles
These are a solid wet weather tyre with excellent wear properties over standard OEM (Bridgestone Re040) tyres. They are a little skidish during hard cornering on dry services and lack a fair amount of dry grip. I'm a little gun shy after unpredicted drift into a bend. I will opt for a more grippy tyre to enjoy more spirited driving. As a daily drive its a good value tyre though, particularly for your grandmothers car.
Helpful 664
July 16, 2014
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