Menu
Constancy LY688 View Gallery (1)
175-235/55-70 R14-17 34 sizes 2021

Constancy LY688

The Constancy LY688 is a Touring Summer tire designed to be fitted to Passenger Cars.

5.1
Tire Reviews Score Based on User Reviews
Limited Confidence View Breakdown
Dry Grip
57%
Wet Grip
43%
Road Feedback
47%
Handling
42%
Wear
68%
Comfort
50%
Buy again
47%
25 Reviews
51% Average
114,100 miles driven
1 Tests (avg: 43rd)
Constancy LY688

Constancy LY688

Summer Budget
BETA
5.1 / 10
Based on User Reviews · Limited Confidence · Updated 23 Feb 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: 1
Publications: 1
Period: 2016
User Reviews
Weight: 15%
Reviews: 25
Avg Rating: 50.5%
Min Required: 5
Consistency
Weight: 5%
Score Std Dev: 0.17
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
Data Sources
TestPublicationDateSizePositionMetrics
2016 Market Overview - Braking Test Auto Bild 2016 205/55 R16 43/50 0 metrics
1
Tests
43rd
Average
43rd
Best
43rd
Worst
Latest Tire Test Results
43rd/50
Size Fuel Wet Noise
14 inch
185/60R14 82 H D C 68
15 inch
195/65R15 91 V C C 68
195/55R15 85 V D C 68
195/65R15 95 H XL C C 68
195/65R15 91 H C C 68
185/65R15 88 H D C 68
16 inch
205/55R16 91 V C C 68
205/60R16 92 V C C 68
215/60R16 99 V XL C C 68
17 inch
215/55R17 94 V C C 68
235/65R17 104 H C C 70
225/60R17 99 H D C 68
View All Sizes and EU Label Scores for the Constancy LY688 >>

Questions and Answers for the Constancy LY688

Ask a question
Sorry, we don't currently have any questions and answers for the Constancy LY688. Why not submit a question to our tire experts using the form below!
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.

Top 3 Constancy LY688 Reviews

Given 69% while driving a Lexus IS220D (205/55 R16) on mostly motorways for 12,000 average miles
These came on my Lexus IS220d when bought used and i was sceptical as i don't buy tires ever However they were brand new and i thought i'd see how i got on with them I have to say i have no real complaints, the dry grip, handling and wear are good. I have had traction control in the wet when you use heavy throttle even in a straight line but if you are smooth then no issue I use the car on the motorway and its rock steady with a little tire noise, but i think this would be much worse if it wasnt a Lexus ie quiet Overall surprised, likely would but something better when they needed it but have to be considered on this performance
October 17, 2022
Peugeot (185/65 R15) on a combination of roads for 0 average miles
Only driven on for 150 miles roughly. Had numerous issues spinning them up trying to moderately set off from junctions and understeer coming off roundabouts at 20mph. Shouldn't be sold whatsoever. It's not like I'm driving a bloody sportscar, it's a 95hp hatchback!
February 4, 2022
Given 30% while driving a Ford Transit Courier (195/60 R15 H) on a combination of roads for 8,000 average miles
Got to say these are the worst tires I have ever had in 43 years of driving. They do have some comedy value though, they make me laugh as they massively understeer when there is the slightest hint of moisture on the road. They slide even on modest bends in the dry too. I'm not driving a powerful monster car either, just a small Courier van with 95 HP! They would be good for you if you have too many speeding points though, because you simply cannot drive too rapidly with these on, well not if you value your time on this Planet. Only plus point is their longevity, they just don't appear to be wearing down, amazing really when they spend so much time slipping over jagged tarmac. So the next time my Garage phone me and say "shall I just fit you some budgets on it" I shall tell him where to insert his tires!
July 7, 2020

How would you rate the Constancy LY688?

Click a star to start your review

Latest Constancy LY688 Reviews

Given 40% while driving a Rover Rover coupe vvc (225/45 R17) on mostly country roads for 0 spirited miles
Had one blow out after hard cornering. I replaced the lot cant trust Chinese junk
July 18, 2020
Given 24% while driving a Yamaha Rvr (225/45 R17) on mostly country roads for 100 spirited miles
Really bad would rather have drive on the bare rim
April 16, 2020
Given 33% while driving a Toyota Yaris 1.5 ts (185/55 R15) on a combination of roads for 2,000 spirited miles
Hit a roundabout in the wet with them on the rear in my yaris t sport usually fine with any other tire .going round at about 40mph and the back end slid out. I shit myself to say the least these tires should not be legal. Have done multiple burnouts and they wont wear down so the wear is brilliant. Ps these tires had a shit load of tread they look brand new.
August 16, 2019
Given 44% while driving a Honda CRV (225/65 R17 H) on a combination of roads for 5,000 spirited miles
alright in town and on dry roads but try and pull away on wet tarmac and you will be left standing. I'm in two minds as to go and get these replaced when winter arrives as I have absolutely zero confidence in these tires on wet roads. They are also incredibly noisy, at first I thought it was my roof bars / box but after removing them the noise has not gone away. The only upside I suppose is that i am desperately trying to wear them down to justify buying some new tires but they are lasting ages!
June 10, 2019
Given 20% while driving a Ford S Max (225/45 R17) on a combination of roads for 100 spirited miles
Dangerous, I discarded my very worn rear tires for a set of these that were brand new...Something was wrong so i thought maybe they didn't set the tire pressures properly. They were slightly out so i adjusted and to my amazement it was still the same. I then done a little bit of research which i should of done before and saw the reviews. This company shouldn't make tires!
May 30, 2019
Given 36% while driving a Dacia Sandero 1.2 16v (185/65 R15) on mostly motorways for 4,000 average miles
Paid £35.50 a tire for these and they're miles worse than tires I got for £31.50! It's like driving on a washboard roof. The noise is horrendous, It sounds like a tube train and the braking performance is frightening. There are decent tires in this price range but these are certainly not one of those. Avoid these tires at all cost.
May 14, 2019
Skoda (205/55 R16 V) on mostly country roads for 0 average miles
These were on my new to me Skoda Octavia 2ltr 150hp diesel model fitted to the front.They are noisy and even in the dry I feel only mildly confident putting them into a fast bend. But in the wet they are awful or on new shiny tarmac. You get wheel spin as you try to pull away. Even when going to overtake in the rain they wont put the power safely on the road and spin. Luckily I have not had to brake hard yet but needless to say I have had the car three weeks and will be changing the tires to Goodyear fishers. A much better and safer choice. If you did city driving only these tires might be okay as travelling at low speed and no twisty roads. But for country roads and dual carriageways I would not recommend them.
May 13, 2019
Given 86% while driving a Mercedes Benz E class 2005 (225/45 R17 R) on a combination of roads for 5,000 average miles
I've hear this brand many years ago but never got a chance to try it, until I bought my Mercedes eclass, put these Constancy at the rear at a fantastic price, fantastic tires, noise was low, wet grip very good. Great tires for the money. Never buy expensive premium brands again, no need to pay for the brands commercial cost.
Highly recommend these Constancy brand.
April 6, 2019
Given 48% while driving a Citroën xsara picasso (225/45 R17) on a combination of roads for 200 easy going miles
just had these fitted to my Picasso, and the noise is dreadful, I am in two minds weather to go back and query this or just go else where, either way they have got to go. slowing down is like being on a tube train there driving me mad
March 25, 2019
Given 57% while driving a Ford Focus ST 225 (2003 2007) (225/40 R18 W) on a combination of roads for 3,000 average miles
Bought a pair for my Ford Focus and had them on the rear. Handling is poor don't even try to go on a bend on a motorway slip road in the wet as you can feel the car slide.
You get what you pay for these days and that just about sums them up cheap.
March 21, 2019
Given 78% while driving a Renault Espace Mk IV (225/55 R17 W) on a combination of roads for 1,000 spirited miles
Brilliant tires for the money £45 a tire, had a set of 4 on my Renault Espace. Good grip and wet handling. Recommend to anyone other than high performance cars.
February 10, 2018
Given 12% while driving a Audi 3,0 tdi quattro sport (255/35 R19 W) on mostly town for 600 easy going miles
No grip wet or dry,ride is like driving on a corrugated roof,had them on 6 weeks and inside wall blew out and a HUGE 35cm gash (luckily I was only doing 20 mph coming off a roundabout and survived to write this). If you value your life avoid this rubbish like the plague,old saying you get what you pay for,HARSH lesson learned.
December 6, 2017
Rate the Constancy LY688