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Accelera PHI

The Accelera PHI is a High Performance Summer tyre designed to be fitted to Passenger Cars.

0.4
Tyre Reviews Score Based on Professional Tests & User Reviews
Medium Confidence View Breakdown
Dry Grip
67%
Wet Grip
44%
Road Feedback
52%
Handling
51%
Wear
65%
Comfort
58%
Buy again
48%
164 Reviews
55% Average
1,335,812 miles driven
3 Tests (avg: 21st)
Accelera PHI

Accelera PHI

Summer Budget
BETA
0.4 / 10
Based on Professional Tests & User Reviews · Medium 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
Value
93.7
0.38x / 1 test
Comfort
78.1
0.29x / 3 tests
Wet
40
2x / 4 tests
Dry
40
1.8x / 3 tests

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

Handling
40
4 tests
Braking
40
2 tests
Score Components
Professional Tests
Weight: 80%
Tests: 3
Publications: 3
Period: 2012 - 2019
User Reviews
Weight: 15%
Reviews: 164
Avg Rating: 55.2%
Min Required: 5
Consistency
Weight: 5%
Score Std Dev: 0.32
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
Data Sources
TestPublicationDateSizePositionMetrics
2019 Tyre Reviews UHP Summer Tyre Test Tyre Reviews 2019 265/35 R19 8/8 11 metrics
2014 Auto Bild 50 Summer Tyre Shootout Auto Bild 2014 225/50 R17 44/50 0 metrics
2012 EVO Max Performance Tyre Test EVO 2012 235/40 R18 10/10 0 metrics
3
Tests
21st
Average
8th
Best
44th
Worst
Latest Tyre Test Results
Low rolling resistance. Low noise.
Very poor wet grip, extremely long wet braking distances, poor dry grip.
The Accelera PHI was extremely low grip in all scenarios. Do not fit this tyre.
Not Recommended
44th/50
10th/10
Finishing bottom of the table in nearly every test secured the Accelera its last place, however EVO noted it wasn't as bad as some of the other budgets tested in previous years. As is the norm with budget tyres, it was capable in the dry but lacked grip, composure and safety when the surface changed to wet.
Size Fuel Wet Noise
16 inch
205/55R16 94 W XL C C 70
17 inch
205/50R17 93 W XL C C 70
225/45R17 94 W XL C C 70
18 inch
225/40R18 92 Y XL D C 70
245/45R18 100 Y XL C C 70
255/35R18 94 Y XL C C 70
19 inch
235/35R19 91 Y XL D C 70
View All Sizes and EU Label Scores for the Accelera PHI >>

Questions and Answers for the Accelera PHI

Ask a question
June 26, 2016

Are the Accelera PHI tyres run flat?

We're not currently aware of a runflat version of the Accelera PHI tyre.
August 24, 2016

What side is the front of the tire?

The PHI will have "outside" written on the outside, or front, of the tyre.
October 17, 2016

What is the estimated mileage for the Accelera PHI 225/45 R18? I have a Kia Soul Exclaim (2011) and am looking for four new tires

The mileage of the Accelera PHI depends largely on your car and driving style. It's best to look at other reviews posted to match your driving style and vehicle.
May 3, 2021

I recently purchased a 2019 Nissan Sentra equiped wiht 205 55r16 accelera tires. Approaching 70 miles p/h the care experiences a significant and uncomfortable vibration. Do you have some suggestion to make for this issue?, could it have something to do with the tires itself?

There is a chance the tyre could be out of shape, but it's more likely to be a wheel out of balance. I would suggest getting the wheels balanced at a local tyre garage, and while they're balancing the wheels they can also inspect the tyres.
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Review Summary

Based on 157 user reviews

Drivers' experiences with the Accelera PHI are highly mixed, but the dominant theme is very weak wet performance. Many budget-focused users report acceptable dry grip, stable motorway manners, decent comfort/noise, and surprisingly good tread life for everyday or steady driving. However, a large number of reviewers describe poor wet grip, long braking distances, and unpredictable handling in rain-often labeling the tyre unsafe on more powerful cars or in aggressive use. Overall value is praised, but wet-weather limitations are a major concern.

Strengths
  • Low price/value
  • Decent dry grip for everyday driving
  • Long tread life for motorway/steady use
  • Quiet/comfortable ride for some
Areas for Improvement
  • Very poor wet grip and long wet braking distances
  • Unpredictable handling in rain (oversteer/understeer)
  • Aquaplaning and loss of traction at modest speeds

Top 3 Accelera PHI Reviews

Given 12% while driving a Volkswagen Golf mk7 GTE (225/45 R18) on mostly country roads for 100 average miles
No grip ,feel disconnected from the road would never recommend these ditch finders to anyone
Ask a question | Helpful 865
February 6, 2025
Given 77% while driving a Toyota 2017 Geely Emgrand GT (215/55 R17) on mostly motorways for 1,000 average miles
Recently fitted 4 of these tyres and these are incredibly quiet, above average grip in wet and dry (we had a short spell of rain recently and the car was perfectly stable). These replaced a set of Continental's i had on previously and I'd say the Accelera's are a bargain for what you get.
January 8, 2025
Given 26% while driving a Kia Motors Sportage (225/45 R17) on a combination of roads for 4,000 easy going miles
Absolutely, without doubt the worst tyres that I have ever encountered. Pleased to say that I didn't fit them, but they were fitted (brand new) to a car that I bought. Both front tyres were below the legal limit within 3 months (3000-4000 miles) of moderate driving. I drive a Kia Sportage auto, so I'm hardly racing about and giving the tyres a hard time.

Total junk at best, dangerous at worst.
October 1, 2024
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Latest Accelera PHI Reviews

Initial Impressions Review
Given 51% while driving a BMW 330i (225/45 R18) on for 6,000 miles
Grip was awful, couldn't hook for anything. The wear was very slow though.
January 28, 2026
Initial Impressions Review
Given 14% while driving a BMW 3 series (255/40 R19) on for 9,000 miles
Absolutely horrible tread wear. This tire claims 30000 mile tread wear warranty, but tires are bald after 9K miles and Epi Tyre/Accelera refuses to honor their warranty. The 30K mile warranty is a total fraud, it is just there to draw buyer's in, they never honor it as also stated by other reviewers. No reason to buy cheap tires if have to replace it 3x more often.
January 15, 2026
Check out how the BEST all seasons tyres perform against premium summer and winter tyres!
Initial Impressions Review
Given 48% while driving a Mazda 2 2008 86hp (195/45 R16) on mostly town for 9,000 easy going miles
cheap; XL with alloy wheel protection but lasted only 9,000 miles on light use on a small Mazda 2 car. Previous tyres lasted 22,000 miles. Makes them uneconomic.
January 1, 2026
Given 63% while driving a Mercedes Benz (245/30 R20) on mostly country roads for 300 spirited miles
I'm not sure what everyone is complaining about... These tyres work fine.. My car is RWD 270 bhp... No problems... The funny thing is, the Phi's are on the front, I have an even lesser Accelera tyre on the back and yet I have no issues, the car is controlled, grips well and the feedback is good. From a stopped launch to pulling quickly out of a side road, I've not had any issues. I haven't had any understeer from the fronts, they communicate well. In the wet and in icy conditions again, no traction issues. They are stable on the motorway no wandering or instability.

The only thing to note is the road noise is a little higher than you'd expect but not a big issue and the ride is a little harsh although I'd expect that from any tyre with a 30 profile.

I paid £74 per tyre + fitting (£22 per tyre), so £182 for two, fitted.... A Michelin of the same size would set me back over £280, per tyre, fitted! I'm not expecting these budget tyres to grip like a Michelin or similar premium brand and neither should anyone else. I'll save the £380+ for two tyres thanks.
January 8, 2024
Given 63% while driving a Audi (265/35 R19) on a combination of roads for 500 average miles
I bought these online as i had a discount code, and my car had brand new acceleras on the front tyres already so bought a matching rear set. I had just bought the car, and it needed some rears, so instead of going for premium which would have been 4 times the price per tyre at this size, i bought these, as i didn't fully trust the car at the time, and didn't want to spend £1k on tyres just yet. I've had good experiences with budgets before, so not afraid to try them. In the dry they are absolutely fine, a little noisy, ride is quite firm on the tyres, but i don't mind that. The tyres state all season on the side, although most reviews treat them as a summer tyre, and the tread pattern looks like a traditional summer tyre to me.
Wet weather performance is where this tyre struggles, wet weather braking being the only noticeable downside, initial bite in the wet upon braking is not very strong, and just takes that little longer than you'd expect. So factor that in.
As i mentioned the ride is firm on these tyres, and the grip not the highest, so that would suggest that the tyres are of a very hard compound which should last a long time.
For the money they're good, and for most applications i would say they're fine. They look and feel like a very robust tyre aimed at longevity rather than peak grip, i think the bad reviews here are by FWD hatchbacks that drive them hard, which is just not what they're for.
December 23, 2023
Given 32% while driving a SEAT 1.4 TSI (215/45 R17) on a combination of roads for 100 average miles
These are the worst tyres I've driven on in recent years. They were fitted to a seat ibiza my son bought after just passing his test, the dealer thinking he was doing a good turn supplying the car with 2 new front tyres. On the front the car understeerd like it was on ice, I genuinely thought I was on a diesel spill the first time I went round a wet roundabout. Awful wet grip and dangerously so for a new driver just coming into winter when the road will mostly be wet. As the car had decent branded tyres on the back I thought I'd swap them round even though mixing tyres on the driven end of the car is not a great idea, one avon and one toyo were swapped to the front and the accelera tyres on the back. Now the car had good traction on the front but even at moderate speeds the lift off oversteer was unpredictable and sudden and a less experienced driver would be all over the place and probably off the road backwards. I had to shell out nearly £170 for 2 decent tyres for him as he didn't have the money to get new ones right away. I could not of slept at night knowing my son was driving on these death trap tyres.
Just to be clear, I've driven hundreds of cars over 40 years and I would say I'm a hard but not stupid driver, I've had everything from v6 capris to gtr's, I know how to control a car and I can say without question these tyres are a false economy, spend the extra 30 quid or whatever on decent tyres and save yourself an insurance claim. I read someone's review saying if you drive slow enough they're fine. Well you could argue that if you drive completely slick tyres in the rain you'll be fine if you go slow enough. The problem is things happen that are beyond your control, you may need to stop in a hurry for whatever reason and If the car in front of you is on decent rubber and you're on these, trust me, you're hitting the back of them or going off the road.
DONT BUY!!!
September 23, 2023
Mercedes Benz (225/50 R16) on track for 5 spirited miles
I have now purchased and destroyed 12 of these tires in the same 16" size as I use them for rallycross in Texas. These tires normally last 18-20 laps and are great before they come apart. You pay a good price for a tire that lasts only as long as you want it to. Now, I also run the 651 Sport and those also wore down fast at the track a little too fast. I do run Toyo Prox R888R and those seem to last a little bit longer, but are 3x the price!
I have no idea how these tires work on public roads, but I have done drift and rally with them and will continue to....
August 29, 2023
Given 10% while driving a Hyundai Creta SX (245/55 R18) on track for 4,000 easy going miles
One of the worst tyre which i hv seen frm my age 17 to 37 years , in just 3600 km my car tyre got slapped and bcm a healthy airy shapeshop vendor or Retialer or Tyre Showroom Owner said this s out of warranty because this s Cinese tyre but on this ISI maark is there, no warranty guarranty , i hv 6 cars so i will not prefer this tyre to anyone
July 29, 2023
Given 79% while driving a BMW 335i (265/30 R19) on mostly motorways for 145 miles
I have only 145 miles on these tires but I had comfort while driving and road noise was little to none.I pushed them to triple digits in the dry and wet and they felt solid.Other than a slight vibration which I suspect wheel balancing could be better, but the tires are decent for the price.
July 4, 2023
Given 53% while driving a BMW m2 (265/35 R19) on a combination of roads for 10,000 spirited miles
You can find a lot of reviews online about these tyres, and most of them extremely criticize the performance in various conditions. I switched to Acceleras due to the fact I'll be changing wheels from 19'' stock to 18'' APEX SM-10. As the rear tyres were running low, I decided to spend £70 per tyre instead of £300+ for Michelins when I'll need to replace them in 6 months anyway to accommodate the wheel change. Considering that I still use Cup2's at the front axle, the Acceleras deal with everyday driving ok. The dry grip is about 30-40% lower than Michelin's depending on the surface of the road, it doesn't bother me as I'm used to cars that feel a bit more alive and most people will not notice the difference until you need to pull out from the side road or get on the busy roundabout. Motorway - is a bit sketchy, the car does not feel as solid or planted at speed when changing lanes, and I'm not talking about going supersonic... that from 60mph+. Definitely will not be able to switch lanes aggressively or the back will swing around you. Wet grip - now this is really subjective, as we all do different driving. Personally, I use my car every day and commute from M25 J16 to M1 J10. M25 in the rain is sometimes scary and I'm sooo grateful I kept the Cup2's at the front. The Acceleras like to skid a bit when going over paddles, same in town, the car will struggle to accelerate even in a higher gear. I'll bring one example, I was overtaking on M25, going 60mph, 6th gear, put my foot down to overtake, and the rear goes. That's partially due to the M2's torque but you get the point... Had a chance to use them during my latest road trip to the lake district, snowy/icy road is definitely something you MUST avoid if using these tyres. I was sliding at 3-5 miles per hour with no throttle applied. Managed to get to the top of the Honister Pass, but trust me when I say a little bit of poo came out... The tyre is fairly controllable at the limit and beyond, just be aware - you'll get to the limit much much sooner than you think, you can push it a bit, not as much as you would with a £300+ tyre but this characteristic lets you have some fun at lower speeds, and you'll not feel sorry shredding this budget rubber as they're soo cheap to replace. In terms of wear, they cope quite well, used them for around 5 months (10 000miles of commuting including 2 road trips to Lake District) and the latest MOT shows around 5.2mm. I can't speak for comfort or noise as having good or bad tyres in the car with bucket seats, roll-cage etc doesn't make much of a difference. In a conclusion, It's difficult to say if I would recommend them to anyone, but I'm sure they have some application. Highly depends on what is your car and what is your driving style etc. I can't say anything negative as I knew they will not provide as much grip in various conditions, they just worked for me and saved me money. If you have a slower car, and you drive from A to B I think this tyre would work well for you. Not going to wear as much and the price is great for what it is. Just be aware of the conditions on the road, wet grip, and most likely massively increased braking distance. For anyone else, more powerful cars, or someone who likes to drive their car a bit more aggressively - please don't buy it unless you have a valid reason behind it... if you need to save money, or just would like to slide a bit on the track without spending a lot on tyres, go for it. But everyday use will affect the performance of your car by a significant margin and you will need to be aware of the conditions on the road at all times.
January 6, 2023
Given 23% while driving a BMW 218d Active Tourer (225/45 R17) on a combination of roads for 400 average miles
I really am not sure what the people giving positive reviews of these tyres are thinking, but I had four brand new ones for the dealer. I have zero confidence in these tyres to deal with anything other than the most mundane driving. Straight line at 30 miles an hour in the dry, you'll be fine. I have found in the wet under even the slightest acceleration the front end is squirming around, cross a road marking or white line and they seem to just aquaplain over it, even if it's dry. When alone in the car I decided to test them out, you need to know what your tyres can get you out of and within 1 minute had managed to get the back end out, accelerating out of bend at 10mph. Having just come out of a 2018 C-Class coupe, so far I am not enjoying the BMW driving experience and I can only think this is down to the tyres, shockingly bad. With the winter coming up I will be switching these up for something more reliable. Regardless of the drivers saying 'don't race' as if that's a way to make the tyres safe - I don't race - you need to know that if you need to accelerate away quickly, brake sharply or need to get yourself out of danger another way, that the tyres are going to let you down. Zero confidence in these to do that.
November 3, 2022
Given 30% while driving a BMW 320D xDrive Gran Turismo (225/45 R18) on a combination of roads for 5,000 average miles
These were on the car when I bought it. I do NOT recommend these tyres. Not great in dry weather and downright dangerous in the wet (which is quite often in the UK!) Cant get new tyres quick enough
October 8, 2022