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Bridgestone Battlax Hypersport S21 View Gallery (1)

Bridgestone Battlax Hypersport S21

Bridgestone Tires Extreme Performance Summer Next

The Bridgestone Battlax Hypersport S21 is a Extreme Performance Summer tire designed to be fitted to Motorcycles.

6.9
Tire Reviews Score Based on User Reviews
Limited Confidence View Breakdown
Dry Grip
95%
Wet Grip
80%
Road Feedback
92%
Handling
95%
Wear
63%
Comfort
83%
Buy again
93%
7 Reviews
86% Average
15,560 miles driven
Bridgestone Battlax Hypersport S21

Bridgestone Battlax Hypersport S21

Summer Premium
BETA
6.9 / 10
Based on User Reviews · Limited Confidence · Updated 15 Jun 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: 7
Avg Rating: 85.8%
Min Required: 5
Consistency
Weight: 5%
Score Std Dev: 0.04
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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Top 3 Bridgestone Battlax Hypersport S21 Reviews

Given 70% while driving a BMW 218d Active Tourer (180/55 R17) on mostly country roads for 3,800 average miles
Great tires for high demanding bikes and bikers, the quality the rubber is excellent if you are one of those extreme bikers that wanna lean yourself daily at angles over 50 degrees, the tire feel with the road is funtastic. It doesnt last much 7.000km was the most i could take out of this tire but it was 1500km to many of what they really can assure, the center of the tire its extremely soft so if you do alot of straights and lean max around the 35 to 40 degrees and daily use less then 35 be prepared to have a square tire after 2500 3000 km, the tire is magnificent on dry and thats about it, wont be getting it again there are better options at a lower price for average sport usage that will last alot longer then this one without performance decrease on a middleweight naked. BMW F900R
Helpful 818
April 18, 2023
Given 89% while driving a Suzuki 1999 Gsxr750 (180/55 R17) on a combination of roads for 3,000 spirited miles
The first set of Bridgestone that i am really happy with them . Very sticky in twisting roads and good enough in racetrack as well. Wear is very good and warm up is quick also. The only bad experience i had , .was with the pedestrian crossing lines , very slippery on them..
Helpful 803
January 26, 2022
Given 91% while driving a BMW S1000R Sport (190/50 R17) on a combination of roads for 3,000 spirited miles
Excellent tire
Helpful 868
August 12, 2021

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Latest Bridgestone Battlax Hypersport S21 Reviews

Given 100% while driving a Yamaha R1 (190/55 R17) on a combination of roads for 160 spirited miles
I recently purchased a pair of these for my 05 R1. Despite the stock rear being a 190/50, I went for the 190/55.

160 miles in (60 of that were rapid laps around a brand new set of national speed limit roundabouts on a dry day averaging 22 degrees centigrade before writing this) and I am already extremely happy with them. They have more grip now than my previous Rosso II's ever did and feel phenomenal round the bends when they have even been scrubbed fully in yet.

Part will be down to the different aspect ratio sure. (if you have the same bike you must pick up this size.)
But a lot of it is down to just how good the tires are.

This is of course subject to change. And I will update the unknown But so far I would definitely recommend them for the sheer pleasure they provide alone.
Helpful 846
May 14, 2018
Honda Fireblade 1000 (225/45 R17) on track for 100 spirited miles
I've recently completed a track day on these tires and comparing them to the metzeler racetecs I was on these are pretty much on par! I was very impressed with these for a road tire they're possibly the best I've ever had! I've hated all bridgestones in the past but they have definitely got these spot on, would recommend to anyone. Have pics from track with my peg down if you need further convincing :)
Helpful 600
July 5, 2016
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