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BCT S900

BCT Tyres High Performance Summer

The BCT S900 is a High Performance Summer tyre designed to be fitted to Passenger Cars.

5.8
Tyre Reviews Score Based on User Reviews
Limited Confidence View Breakdown
Dry Grip
54%
Wet Grip
32%
Road Feedback
42%
Handling
28%
Wear
28%
Comfort
46%
Buy again
22%
5 Reviews
36% Average
15,200 miles driven
BCT S900

BCT S900

Summer Budget
BETA
5.8 / 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: 5
Avg Rating: 36%
Min Required: 5
Consistency
Weight: 5%
Score Std Dev: 0.26
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

Sorry, we don't currently have any magazine tyre tests for the BCT S900

Questions and Answers for the BCT S900

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Top 3 BCT S900 Reviews

Given 14% while driving a Ford Fiesta (225/45 R17) on mostly country roads for 3,000 average miles
By far and away the WORST tyres I have ever had. I've had scrapyard cast offs better than these. Fitted to the front of my Fiesta they have nearly caused me to have 2 or 3 accidents as the understeer they cause is catastrophic. I wheel spin in 2nd AND 3rd gear going up gentle hills the dry.
If you value your safety, avoid this cheap crapped like the plague.
Helpful 638
March 13, 2015
Given 71% while driving a Renault Clio II 1.2 16v (185/55 R15 V) on a combination of roads for 2,000 easy going miles
I've required two new tires just before my MOT and these were the cheapest they had at my local tire dealer who did me a deal of 2 for £100 inc. fitting, valves, balancing and rotation. These BCT S900 's are fitted to the rears of my Renault Clio. The ride is really comfortable. Road noise has noticeably reduced on the motorway. Wet grip is fine and in the snow I experience much better rear grip. Especially on a corner where I previously experienced over steer on snow. After driving 2000 miles in 3 months on a variety of roads these are great tires in my opinion which I would recommend.
Helpful 670
May 3, 2013
Given 41% while driving a BMW 318D (225/45 R17) on mostly motorways for 0 average miles
Stay away from these unless you dont drive in wet conditions
Helpful 644
May 11, 2012

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Latest BCT S900 Reviews

Given 41% while driving a Chevrolet Silverado 2500 (225/75 R15) on mostly country roads for 200 average miles
These were 8 ply trailer tires BCT JK 42 ST 225 75R15 In less than 6 months of very limited use (under 900 miles) I had a tire "peel" off the casing. Showed it to the dealer, pointing out there was no contact with the fender or cuts on the rubber. He said it was "normal" sometimes with trailer tires to do that and sent it to the distributor who offered me $25.00 towards a new tire. I am pulling horse worth thousands of dollars and every other tire manufactuer laughed when I told them that answer. Definitely do not stand behind their tires. Wouldn't risk my familys safety with their product
Helpful 553
February 24, 2013
Given 11% while driving a Renault Megane RS250 (225/45 R17) on a combination of roads for 10,000 average miles
The worse tyres i ever bought
I Wouldnt use them
Even i got it for free
Helpful 583
November 19, 2012
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