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Lassa Impetus Sport View Gallery (1)

Lassa Impetus Sport

Lassa Tyres Ultra High Performance Summer

The Lassa Impetus Sport is a Ultra High Performance Summer tyre designed to be fitted to Passenger Cars.

6.0
Tyre Reviews Score Based on User Reviews
Limited Confidence View Breakdown
Dry Grip
57%
Wet Grip
44%
Road Feedback
48%
Handling
32%
Wear
63%
Comfort
46%
Buy again
32%
6 Reviews
46% Average
37,030 miles driven
Lassa Impetus Sport

Lassa Impetus Sport

Summer Economy
BETA
6 / 10
Based on User Reviews · Limited Confidence · Updated 30 Jan 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: 6
Avg Rating: 46%
Min Required: 5
Consistency
Weight: 5%
Score Std Dev: 1.81
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 1.8 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 8 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 0.1 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
All Tests

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Questions and Answers for the Lassa Impetus Sport

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Top 3 Lassa Impetus Sport Reviews

Given 26% while driving a Mercedes Benz C220 CDI Estate (255/35 R18) on mostly town for 6,000 average miles
Worst tire that I had.
She came with the car and was put on the rear axle.
1) Dry grip is poor. With a sharp acceleration tires constantly slip. Even at speed.
2) Wet grip is life threatening. With a minimal push of gas, a skid occurs. Feeling like you're riding on ice.
3) Noisy.
4) Heavy and tough. Extremely low level of comfort.
5) The side protection performs decorative functions.
6) Extremely high fuel consumption.
7) Only one plus - long wear.
The tread is fine, but I'll take them off - my life is more expensive.
Ask a question | Helpful 662
November 29, 2018
Given 38% while driving a Audi A3 TDI QUATTRO SLINE 170bhp (225/40 R18) on a combination of roads for 6,000 average miles
A very poor choice of tyre, road noise is terrible, wet handling is awful.the only positives of this tyre is they wear well, but that is it, obviously they are cheap for a reason!!!!
I used to have eagle f1 assy on my car and I will definately be going back to them for my next set of 4 tyres .they just have very poor grip,whether its wet or dry.i guess I expected to much from the the tyre,but in my opinion,if you I've your driving and at times can be enthusiastic,then this is definately not the tyre for you,as I have found out....And as stated earlier,the tyre noise at slow speeds etc is terrible.I will be a happy man when these tyres need replacing,the are shockingly poor in all driving conditions,well unless you are a Sunday driver,but then you will have to endure the noise!!!
Well that's my opinion anyway
Ask a question | Helpful 570
December 27, 2012
Given 36% while driving a BMW 320D (225/45 R17) on mostly motorways for 0 average miles
worst tyres ever had... wet grip very bad,feels like driving on ice even on dry road. done on them around 23000miles in town and motorway,now I have got new ones falken 914( best tyres ever).
Ask a question | Helpful 538
May 10, 2013
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Latest Lassa Impetus Sport Reviews

Given 79% while driving a Mazda RX8 (235/40 R18) on a combination of roads for 30 spirited miles
New fitted on rx8 231 soon real wear rate yet. Grip is comparable with avons previously fitted, possibly better. Ride seems slightly more pliant but seems good as soon as you turn in, flat cornering and no sudden breakaway. Only fitted on rears at present so I can't give opinion on steering feel yet.
Ask a question | Helpful 540
September 24, 2012