Menu
Sumitomo BC100 View Gallery (1)
145-255/35-80 R13-20 155 sizes 2016

Sumitomo BC100

The Sumitomo BC100 is a Touring Summer tyre designed to be fitted to Passenger Cars.

7.2
Tyre Reviews Score Based on Professional Tests & User Reviews
Medium Confidence View Breakdown
Dry Grip
78%
Wet Grip
75%
Road Feedback
71%
Handling
69%
Wear
74%
Comfort
74%
Buy again
65%
17 Reviews
72% Average
110,600 miles driven
2 Tests (avg: 22nd)
Sumitomo BC100

Sumitomo BC100

Summer Economy
BETA
7.2 / 10
Based on Professional Tests & User Reviews · Medium 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
Value
68.6
0.42x / 1 test
Dry
59.2
1.8x / 3 tests
Wet
56
2x / 5 tests
Comfort
53.3
0.32x / 1 test

Cross-category scores are derived metrics that combine data from multiple test disciplines to evaluate real-world performance characteristics.

Braking
60.3
4 tests
Handling
52.1
3 tests
Score Components
Professional Tests
Weight: 80%
Tests: 2
Publications: 2
Period: 2019 - 2024
User Reviews
Weight: 15%
Reviews: 17
Avg Rating: 72.2%
Min Required: 5
Consistency
Weight: 5%
Score Std Dev: 0.22
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
Data Sources
TestPublicationDateSizePositionMetrics
2024 Summer Tyre Market Overview Auto Bild 2024 205/55 R16 37/55 2 metrics
2019 Mid Range Tyre Test Moottori 2019 205/55 R16 7/8 8 metrics
2
Tests
22nd
Average
7th
Best
37th
Worst
Latest Tyre Test Results
37th/55
2019 Mid Range Tyre Test
205/55 R16 • 2019
7th/8
None mentioned.
Long braking in the dry and wet, low wet grip and oversteer balance.
Size Fuel Wet Noise
13 inch
155/80R13 79 T D B 69
14 inch
185/60R14 82 H D B 69
165/70R14 81 T D B 69
175/65R14 82 T D B 69
185/70R14 88 H D B 69
175/65R14 82 H D B 69
15 inch
185/65R15 88 H D B 69
195/55R15 85 V D B 69
195/55R15 85 V D B 69
195/65R15 91 V D B 69
195/65R15 91 V D B 69
195/65R15 91 H D B 69
195/65R15 91 H D B 69
195/65R15 95 T XL C B 70
185/65R15 88 T D B 69
195/55R15 85 H D B 69
185/65R15 92 T XL C B 70
16 inch
215/60R16 95 V C B 70
205/60R16 96 V XL C B 70
205/55R16 94 W XL C B 70
205/55R16 94 W XL C B 70
205/55R16 91 V D B 69
205/55R16 91 V D B 69
205/60R16 92 H D B 69
205/55R16 91 H D B 69
205/55R16 91 H D B 69
17 inch
235/65R17 108 V XL C B 70
225/45R17 94 W XL D B 70
225/45R17 94 W XL D B 70
215/45R17 91 W XL D B 70
215/55R17 94 W D B 69
225/50R17 98 W XL C B 70
225/50R17 98 W XL C B 70
205/50R17 93 W XL C B 70
225/60R17 99 H D B 69
18 inch
245/40R18 97 W XL C B 70
225/40R18 92 W XL D B 70
225/40R18 92 W XL D B 70
245/45R18 100 W XL C B 70
255/35R18 94 W XL D B 70
235/60R18 103 V D B 69
19 inch
235/35R19 91 W XL D B 70
20 inch
255/45R20 105 W XL C B 71
View All Sizes and EU Label Scores for the Sumitomo BC100 >>

Questions and Answers for the Sumitomo BC100

Ask a question
November 29, 2025

What is the meaning of road feedback

It's a term for how much feedback the tyre gives you about grip levels.
Ask a question

We will never publish or share your email address

captcha

To verify you are human please type the word you see in the box below.

Review Summary

Based on 15 user reviews

Most drivers rate the Sumitomo BC100 positively, praising confident wet and dry grip for the price, stable handling, and overall value. A minority report weaker wet grip, traction and braking on heavier vehicles or vans, plus some noise; wear feedback is mixed but generally acceptable.

Strengths
  • Wet grip confidence
  • Good value/price
  • Dry grip
  • Stable handling
  • Overall satisfaction/buy again
Areas for Improvement
  • Wet grip/traction concerns
  • Long braking distances/lockup
  • Noise
  • Understeer on heavier vehicles/vans

Top 3 Sumitomo BC100 Reviews

Given 90% while driving a Vauxhall Astra H 1.6 VVT (115bhp) (225/45 R17) on a combination of roads for 0 miles
Hello, I have done quite a few reviews on tyres here but with other cars and tyres under Astraman. I have another Astra a1.6 j series bought it last year after the other one decided sodd this world I'm done here, so bought this one and its great, car came a from Vauxhall dealer came with brand new tyres on front and back.. the rears have the BC100 on, ah..I thought these again my experience with these was on my Vectra 1.8 which were then under Falken owned by this lot and were then ZIEX ZE912 pattern which are the BC100's. The grip then and now I will only talk about wet grip and wear as dry grip as with most tyres can be very close unless your on the really cheapo's plastic rubber tyres. On the front of my Vectra they only did 7k but didn't fail me in the wet at all but the wear was really poor, so seeing this tyre again on the rears of my latest car didn't please me too much but here they are lets go.

Well they are very good in the wet and well planted on the road a tad hard and they are quite stiff in the walls, but being on the rear where the cars grip is they have been very good in all weathers, they haven't been too bad on the wear they have done very close to 19k and are now at 5.6mm on both rear tyres as they are not much over 7mm new so not too shabby, I run my tyres 4psi above comfort as one psi below base pressures is under pressure.

Will I buy them again for the rears yes I will they do the job ( on my car ) please remember not we all don't drive the same and differ with our tyre pressures and weight of cars but they do for me and they are still not too expensive as lately near me the prices have gone stupid.
I hope this helps some of you I dont drive like a spanner any more but just now and again I do flick into chase mode.
Cheers
April 18, 2025
Given 87% while driving a Toyota Avensis (215/55 R17) on a combination of roads for 7,000 miles
Having researched these tyres before purchasing I seems sumitomo is one of the world’s major manufacturers owners of many of the top brands inc Goodyear ECT apparently highly regarded in Japan after one trip to Portugal and two to spain crossing France I can’t fault them would Definitely buy again.
December 5, 2024
Given 73% while driving a Ford Mondeo TDCI (215/55 R16) on a combination of roads for 13,000 easy going miles
When I purchased this brand of tyre I thought it was mid range which was a step up from a budget tyre. However, the tyres have only lasted just over 12 months (14 months). I'm thinking they should have lasted a bit longer. I could therefore purchase a budget tyre at less cost because that would last 12 months before changing.
April 30, 2024

How would you rate the Sumitomo BC100?

Click a star to start your review

Latest Sumitomo BC100 Reviews

Given 100% while driving a Ford Ecosport (205/60 R16) on for 20,000 spirited miles
Perfect tires in dry and wet roads.
November 10, 2023
Given 100% while driving a Fiat Panda (175/65 R15) on for 15,000 average miles
Perfect tires at a very good price.
August 28, 2023
Check out how the BEST all seasons tyres perform against premium summer and winter tyres!
Given 40% while driving a BMW 318is (195/65 R14) on a combination of roads for 2,500 average miles
First of all I'd like to clarify that I bought the car in late february 2023 with these tyres (DOT 0119) fitted on by the previous owner sometime during 2019. Between the tyres being fitted and me buying the car, it was not used very much. In fact it was sitting for most of that time with occasional use to keep the battery "healthy". I've driven about 4000km on them and I think it's fair to say I am not very impressed.

The first problem I encountered was the fact that while they aren't dry rotted, microcracks have started forming inside the grooves in the tread and on the sidewall to a lesser extent, but since they had still plenty of tread left I thought to give them a go for a while before changing.

On average-high quality dry pavement the grip is not phenomenal but I wouldn't consider them dangerous to drive on. They can spin for a few meters when launching in first gear and momentarily when changing to second quickly near the redline. Totally expected for an old rwd car with about 140 horsepower more or less. When starting uphill on poorer quality pavement the wheelspin is unavoidable no matter how smoothly I try to take off. In the wet on the other hand it takes almost zero effort to spin at low speeds and it's not hard at all to induce oversteer when cornering at a slow pace.

I haven't found the limit of grip to be progressive, as when inducing oversteer on purpose and the "drifting angle" becomes a bit higher there is a tendency to fishtail.

When driving on a twisty road, the front tyres are slow responding, meaning there's lag between turning the wheel and the car changing direction. I know the 65 series profile is big but I'm not too keen on that behaviour.

The worst part is braking, as I've had to "panic" brake on two seperate occasions (average pavement, dry weather, tyres were not cold) from moderate speed in order to avoid obstacles and the tyres didn't brake efficiently enough. The front wheels locked up much more quickly than anticipated (car has no ABS), meaning the brakes outpowered the tyres by a lot. I'd expect better performance and having to pump the brake pedal less to keep control of the situation. Thankfully none of the afformentioned situations resulted in an accident.

To summarize I wouln't buy these tyres again and I wouldn't reccomend buying them to anyone since they somewhat disappointed me. Sure, I didn't buy them new and they weren't stored in the best conditions when I got my car and started driving it but I surely expected better braking and handling to some extent.
July 13, 2023
Given 63% while driving a Ford KA 1.3 (165/65 R13) on mostly motorways for 1,000 average miles
Good basic tyre, not exciting but a solid performer
July 5, 2023
Given 83% while driving a Alfa Romeo MiTo (195/55 R16) on a combination of roads for 200 spirited miles
Not had these for long but so far they're great for budget priced tyres. Didn't want to spend a fortune as I'm replacing my alloys soon. For the mileage I do they do the job.
December 1, 2022
Given 63% while driving a Volvo S60 D5 (185) (225/45 R17) on mostly town for 10,000 spirited miles
In normal driving these are fine, I have had to emergency brake 4 times for deer in the forest and every time they stopped very well and my car escaped unscathed. Wet performance isn't the best, but not what I would consider unsafe or below par. Aggressive driving and going round roundabouts quickly is a little bit worrying, admittedly only twice I've had it understeer and tramline, but it was still a little surprising still. Very, very rarely I've momentarily had wheel skids when planting my right foot, but I would expect that with diesel torque. On the rear these tyres were fine though.
March 3, 2022
Given 100% while driving a Audi 100 2.5. tdi avant (225/45 R17) on mostly motorways for 20,000 spirited miles
Best tyre ever
August 24, 2020
Given 50% while driving a Volvo V90 D4 (225/45 R17 W) on a combination of roads for 300 spirited miles
225/55/R17 tyres fitted by the dealer when I bought my 2017 Volvo V90 D4 Momentum. Car weights nearly 1.85 ton and got 190PS diesel engine, front wheel drive. These tyres often lose grip when I accelerate quickly even on dry road with the slightest imperfect surfaces. On wet road these do not give me confidence at all. Tyre noise is acceptable when they are new, no idea how it performs when wear down. I can't comment on the wear rate just yet but seems to lasts. They are soft tyres so the ride is comfortable I give you that. Other than this, there is not a single thing that I would recommand. I can't wait for these tyres to wear down so I can buy something else.
June 26, 2020
Given 29% while driving a Vauxhall combo van C 1700 1.3cdti (185/65 R15 H) on a combination of roads for 5,000 average miles
Fitted to my works van. The tyre noise is significantly more, the grip in the wet and dry is poor, the van understeers horribly now. So glad my company paid to have these fitted!
June 12, 2020
Given 29% while driving a Vauxhall combo van C 1700 1.3cdti (185/65 R15 H) on a combination of roads for 5,000 average miles
Fitted to my works van. The tyre noise is significantly more, the grip in the wet and dry is poor, the van understeers horribly now. So glad my company paid to have these fitted!
June 12, 2020
Given 84% while driving a Vauxhall Insignia CDTI 160 (245/45 R18 W) on mostly country roads for 1,500 average miles
From the moment I put them on the car and drove in the wet and only 2 degrees outside they fill you with real confidence great rain dispersion pattern good road holding even on the twisty roads my driving is mostly family type a cross between motorway a roads ect the feel like a premium tyre but the secret is they actually are!!! there just kept in the background as most people looking for the name not the performance trust me if considering a new brand give these a try I took 4 hours going through reviews and finally took the plunge... Glad I did.
December 4, 2019
Given 99% while driving a Ford Galaxy (225/45 R17) on a combination of roads for 10,000 spirited miles
I have used many tyres and this one is surprisingly good in both wet and dry.
I have full confidence in this tyre and I'll be buying again.
November 11, 2019
Rate the Sumitomo BC100