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Accelera PHI R

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

2.3
Tyre Reviews Score Based on Professional Tests & User Reviews
Limited Confidence View Breakdown
Dry Grip
75%
Wet Grip
46%
Road Feedback
63%
Handling
63%
Wear
63%
Comfort
72%
Buy again
44%
32 Reviews
61% Average
248,419 miles driven
1 Tests (avg: 49th)
Accelera PHI R

Accelera PHI R

Summer Budget
BETA
2.3 / 10
Based on Professional Tests & 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
Dry
64.3
1.8x / 1 test
Wet
51.2
2x / 1 test

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

Braking
57.3
2 tests
Score Components
Professional Tests
Weight: 80%
Tests: 1
Publications: 1
Period: 2020
User Reviews
Weight: 15%
Reviews: 32
Avg Rating: 60.7%
Min Required: 5
Consistency
Weight: 5%
Score Std Dev: 0.57
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
Data Sources
TestPublicationDateSizePositionMetrics
2020 Tyre Market Overview Braking Test Auto Bild 2020 245/45 R18 49/49 2 metrics
1
Tests
49th
Average
49th
Best
49th
Worst
Latest Tyre Test Results
49th/49

Questions and Answers for the Accelera PHI R

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Review Summary

Based on 29 user reviews

Most drivers report that the Accelera PHI R offers acceptable-to-good dry grip and low cost, but widespread complaints highlight very poor wet traction, weak braking in rain, and low confidence at the limit. While a minority of high-scoring reviews praise comfort, value, and adequate wet behavior on heavier or gently driven cars, the majority-especially lower-scoring reviews-describe dangerous wet handling and unpredictability. Overall sentiment is mixed-to-negative with positives focused on price and dry performance, and negatives dominated by wet safety concerns.

Strengths
  • Good dry grip for the price
  • Value/budget-friendly
  • Reasonable comfort/low noise on some cars
  • Decent tread life for some users
Areas for Improvement
  • Very poor wet grip and braking
  • Aquaplaning risk
  • Low feedback and unpredictable handling
  • Noisy/harsh for some users

Top 3 Accelera PHI R Reviews

Given 33% while driving a BMW 530i (225/50 R17) on a combination of roads for 0 average miles
Came with the car I bought back in November.
Average in the dry, awful in the wet. Soft sidewall, low-responsiveness.
Bordering on ditch-finder category.

No progressivity when you're getting anywhere near the grip limit. Little to no feedback through the steering.
Seems hard-wearing. Relatively quiet.

"high performance tyre" according to google AI, which is massively misleading. Not a performance tyre and said performance certainly isn't high.
I would never put a penny towards these tyres. I'll get them swapped for something decent next week.

If you are reading this and are considering this tyre for your car: don't buy them if you care for your family or your car.
July 29, 2025
Given 40% while driving a BMW 135i (235/45 R18) on mostly motorways for 20,000 spirited miles
In the dry, these tyres do the job. But they do the job about as well as an LS388, and on my 380bhp 135i, every corner turns into how well can I drift challenge.

I bought these primarily as the car is only used for motorway trips to my other half’s house, Wigan - York, and so burning up a nice set of PS4’s for motorway and the (very) occasional hard driving sessions, it made sense to purchase cheap tyres to eat up motorway miles. Car does not go to work.

Wet grip:
Where do I get started.

135i, 380bhp, LSD, literally spins 6th gear in the wet. Even 10% throttle kicks the back end out into a slide, genuinely should not be sold these tyres on just how terrible the wet grip is. Do not purchase if you enjoy being alive.
February 2, 2025
Given 74% while driving a Vauxhall Astra VXR (225/45 R20) on mostly motorways for 8,000 spirited miles
Excellent value for money. Dry they are good, wet they are awful.but they're a summer sports tire for 60 quid for 20 inch so can't expect the world but 100% worth the money
August 20, 2024

How would you rate the Accelera PHI R?

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Latest Accelera PHI R Reviews

Initial Impressions Review
Given 33% while driving a Toyota Tercel (205/50 R15) on for 3,000 miles
1997 tercel with full poly bushed suspension, these tires have soft sidewalls so steering felt very vague, on the rain it understeered if i pushed it, after they went out i got some petlas pt525 progreen and even those had way better steering response than the acceleras, but for the budget you cannot ask more
January 28, 2026
Given 39% while driving a Jaguar XKR (285/30 R20) on a combination of roads for 2,000 average miles
There were 4 brand new PHI R tyres fitted to my XKR when I bought it. In fairness, it's not a tyre I would choose for a 510bhp RWD coupe, but you'd expect them to be at least passable in all conditions, and to give you a sense of security as long as you drive within your limits and those of the environment.

To be blunt, these tyres are bl--dy dangerous in damp and cold conditions. I can barely use more than approx 25% throttle without the TCS light firing and the rear end squirming. The final straw for me, was going round a damp corner (6 degrees temp) at approx 20mph with no throttle applied, and feeling the back end starting to slide around. Consequently, all subsequent bends, corners and cambers were taken with extreme caution.

They currently have over 6.5mm of tread and are well scrubbed in.

In terms of the front end; well, it's passable in terms of comfort but turn-in is anything but sharp - and I don't trust the lateral grip whatsoever.

So if you're considering these as a good budget option on a larger wheel size, just DON'T. I wouldn't let a family member in my car (never mind let them drive) in the damp with these things on the rims. You are literally risking your life to save a few quid. I'd rather fit mid-range part worns for the same price!
November 17, 2025
Given 40% while driving a Vauxhall Adam S (225/35 R18) on a combination of roads for 3,000 spirited miles
Dry Grip - given the price of the tyre, just £61.99 a corner, you really cannot ask for more grip than what it has on offer. What these tyres can offer in the dry for the price is nothing short of very impressive

Wet Grip - I cannot even put in to words just how dreadful these are in the wet. It feels like I am driving on slicks. I think just about the only positive thing I can say it is the back end doesn't want to come around when lifting off the throttle, but that is likely only because of the utterly insane amount of understeer these have. Even at a normal road driving pace, going around roundabouts it wants to send you in to the curb. It will push wide if you even look at the throttle the wrong way. In the UK considering it rains as much as it does, they are bloody dangerous.

Road Feedback - really just doesn't talk to me at all. Am I understeering? How much grip is left? Am I about to run out? Who knows, because these tyres have their lips sealed. Coupled with the atrocious wet grip, you don't really know you are about to or are already understeering until it is about to send you in to the curb. In the dry it is good enough, but it just doesn't really tell me what it's limits are making it hard to really press on.

Wear - I can't comment on this, they were so bad in the wet that I had to take them off after just 3000 miles

Comfort - it is a 225/35 18 tyre so it is only bound to be so comfortable. The side wall does feel very stiff, it jitters about and big bumps are back breaking. It reminds me a bit of run-flats.

Buy again - if we lived in a dry world and I was on a tight budget, honestly for anyone not eeking out every percent of their vehicle and really looking for a dynamic drive, these are brilliant. Downright groundbreaking for £61.99 a tyre dare I say. But unfortunately that isn't the real world, and a tyre where I fear the poor weather as if I have to avoid an accident these will likely fail miserably, it is not fun to own.

Not only that but they were so bad that if the weather forecast said rain it would genuinely ruin my drive, any slight dampness on the road would mean fun out of the window and a fight for not understeering in to a ditch. Just to give some perspective, my new Continental Sport Contact 7's are a joy to drive. If anything I get excited for some rain every now and then as it means grip limits are lower, meaning more playing about with the chassis without the risk factors being as high.
March 19, 2024
Given 65% while driving a Saab Automobile 9 3 Turbo X 280bhp XWD (225/45 R17) on a combination of roads for 22,500 easy going miles
These tires covered roughly 22,500 miles.

The car is a South Western United States car, so driving in the wet is rather uncommon and therefore not going to be covered very thoroughly in this review.

Dry grip, however, is solid. I do not currently have another tire to compare to, so this will stand as my baseline.
The tire has a very stiff sidewall, which does not offer much in terms of body roll. This does, however, add to road noise and ride stiffness by a fair amount.
Daily driving on this tire is rather unremarkable. It does all that is necessary and nothing more. It's gotten me through the thick of standing water on a freeway in Arizona during monsoon season, so wet grip within limits is good.
The Turbo X is a manual sedan, and by default a rather front heavy car, so the shoulders of this tire wore very quickly during spirited driving. It grips all the way to the limit, and then begins to step out right outside of my comfortable driving pace. I usually lose the rear prior to the front when pushing it to my limits. Understeer is horrendous, but that is more likely due to my driving style.

All in all, a well rounded tire and can't complain about the price.

(Note: this review does not cover snow or ice grip)
January 17, 2024
Given 100% while driving a Volkswagen Passat 2.0TDI (235/45 R18) on mostly town for 50,000 average miles
Have run these on the rear of my 2.0 TDI Passat for 2 years, no problems at all in wet or dry conditions. So far done 50k miles and they are still legal but about due for a change. Would certainly buy again for rears but I go for higher quality for fronts as it is a FWD car and they do all the heavy lifting, lets face it at regular speeds and civilised driving all the rears do on a FWD car is roll along.
November 21, 2023
Given 34% while driving a DS3 Performance (205/40 R18) on a combination of roads for 4,000 average miles
These were fitted by the dealer on a new car and they are probably the worst tyres I've ever used. They're about average for grip in the dry and probably acceptable for the price, but in the wet they are absolutely terrifying.

On a motorway in the rain, they feel as if you could aquaplane at any moment and changing lanes is a genuinely scary experience even at low speeds. Under braking when wet, they just don't want to stop and the car feels floaty and squirrely, especially down hill. Pulling away from junctions and roundabouts when the roads are damp is fun as well.

If it wasn't for the fact I couldn't bring myself to throw away four new tyres, they'd have been binned off right away. However, I thought I'd wear them down over the summer then swap them out for some PS5s when the weather turned. Luckily I've done over 4000 miles with them and the fronts don't seem to be wearing great so I won't feel too guilty about getting rid of them soon!
October 7, 2023
Given 74% while driving a MINI (205/45 R17) on a combination of roads for 25 average miles
I purchased these for my 2012 Mini Cooper S. The tires lasted about 25,000 before they completely wore out. The car was aligned after the tire installation and rotated every 5,000 miles. While installed, they handled great, including in the rain. I will not purchase it again as I would prefer a tire that lasts longer.
September 20, 2023
Given 29% while driving a BMW 120d e82 (230/35 R19) on mostly country roads for 8,000 average miles
Fitted to BMW 120d e82. Car is 230bhp remapped and rwd.

Use to drive ventus primes tyres and the difference is very noticeable. The accelera has no grip, the car spins its wheels in 3rd when before, the car did not spin at all. Wet weather is very unstable. The car use to glide in the rain and feel in control at 160km/h easy, now it feels dangerous at 100km/hr.

Driving on country roads is also hairy. Any bump in the road will throw the balance out and the tyres are unpredictable. Sometimes it understeers, other times it oversteer. You cannot feel the car like with the higher tier tyre. Would be fine on a city car not doing long motorway mikes or fast country roads and on a small city car with no power, however in the BMW it’s a definite no go. Will be switching back to a premium tyres asap
July 22, 2023
Given 78% while driving a MINI Cooper S (205/40 R18) on for 0 miles
I really don't see the issue with these tyres, they are fine for what you pay. Unless you are a track driver, paying more than double for branded tyres sounds like overkill. This is fine for 95% of driving. I got these after getting 2 punctures in 3 months from very badly built UK roads, and getting fed up of paying so much for a new tyre only to have it destroyed on a pothole.
March 26, 2023
Given 100% while driving a Toyota Yaris (205/55 R15) on mostly town for 500 average miles
Excellent dry grip. I had no problems in the wet. In comparison to the tires that were replaced, I noticed improvements while driving, immediately. The road noise is a lot quieter. These tires are comfortable. I enjoy how much smoother my ride is. These budget tires are awesome! I got good value for my money. I would definitely buy a set of these tires again. I daily drive on the streets mainly. But also on the freeway. The Accelera Phi-R tires are better than the Toyo tires I had.
March 21, 2023
Given 10% while driving a Jaguar XJ (X351) LWB 5.0L Supercharged (275/35 R20) on mostly country roads for 9,000 average miles
If you would like to accelerate your demise, then Accelera are the tyres for you!

Dry grip: These tyres are acceptable for the price given they are extremely cheap compared to their competition. In the dry the tyres do have a tendency to under steer but feedback is alright, if perhaps a bit vague on uneven surfaces. The braking distance isn’t as good as the Michelin PS3s I had on a previous car, but this car is also significantly heavier (600kg), so it’s like comparing apples to oranges.

Wet grip: If you do not value your life, the lives of your passengers or those in surrounding vehicles, go for a drive in the wet. These are LETHAL! My car is rear wheel drive and in the wet these tyres would regularly cause the car to spin out and oversteer. On one occasion I complained to my passenger that the wet grip was appalling and proved my point at the next roundabout by doing a three lap continued power slide! The other drivers waiting to join the roundabout must’ve been rather confused watching a 2 ton, 17 foot lump of long wheelbase Jaaaaag do what you’d expect to see Jeremy Clarkson do, but it did perfectly illustrate my point - these tyres have absolutely no grip in the wet! The aquaplaning resistance is non-existent and the tyres will lose traction in the smallest amount of standing water imaginable; on numerous occasions the rear end lost control and spun out when confronted with patches of standing water - as you can imagine, I drove home in silence afterwards with heavily soiled underpants! These were not at high speeds, but rather 40mph on the unlit A27 between Lewes and Brighton. If you are building a track / drift car, then ironically I’d recommend these tyres.

Road feedback: You can definitely tell that these tyres are made from cheap, hard rubber (almost plastic like) as opposed to a soft compound. The result of this is that the road feedback is harsh, though this does provide a somewhat sporty feel. Unfortunately, the lack of grip means you don’t want to drive the car in a hard / spirited manner. When the vehicle is changing direction in the wet, or driving through standing water, it is not clear what the wheels are doing at all - you only know you’ve lost traction when the rear end slides out and you end up doing a 180 degree turn!

Handling: In the dry these handle fine if all you’re doing is driving your typical family hatchback to the supermarket and back in slow, town-style surroundings. Once the car is on an A or B road, they start to feel a bit out of their depth - they don’t inspire a significant amount of confidence on bends and leave you wondering what the wheels are doing. The result of this is that in the dry they do what you’d expect for the money, ie the bare minimum, but in the wet they are terrifying. The car had a tendency to under steer in the dry and oversteer in the wet, so be prepared to wrestle with the steering wheel.

Wear: I purchased the car used with these on the front and rear wheels with both axels having approximately 6mm of tread left after being put on a month before. In the 9 months of driving and covering approximately 9,000 miles of mixed A and B roads, the tread was down to 3mm on the rear and 4mm on the front. In contrast, my previous Peugeot 208 GTI had Michelin Pilot Sport 3 tyres all round and covered 44,000 miles before needing replacement! When considering these tyres are approximately £120 each for this size, if you’re only getting around 10,000-12,000 miles (assuming you change them at the 2.5mm-3mm mark), then you’d surely get better value for money by purchasing a set of Hankook / Falken / Yokohama for approximately £200 each and getting 25,000 - 30,000 miles of wear. The grip level drops dramatically at the 4mm mark so be warned.

Comfort: Roar! Yes, these tyres roar! I will concede that the tyre noise is more pronounced on some road surfaces than others, but compared to the Michelin PS3, Michelin Cross Climate, Michelin Cross Climate 2, and Continental “ContieContact5” that I have had on previous vehicles, these really do drone on. I had the displeasure of driving along the concrete paved A12 on these and for the entire duration I felt as if my head was in a blender. The adaptive air suspension on the car does a good job when it comes to masking small imperfections in the road surface but it struggles with the larger potholes / dips in the road. If a long wheel base barge with air suspension has a dreadful ride when fitted with these, then I dread to think what a Nissan Micra that’s ran on a shoe string will ride like! The car also has a tendency to tramline on tarmac where layers have flaked away / degraded which can cause steering vibrations. The replacement Hankook Ventus S1 Evo3 tyres provide a much quieter and supple ride which is infinitely better than these. Buy again: No. Nein. Non. Nyet. Do you get the picture? These tyres are appalling death traps and you couldn’t pay me to drive on these tyres. Your tyres are the only thing holding you onto the road, so don’t risk your life and that of your passengers for the sake of saving a few quid. If you’re looking for a tyre that is an excellent all rounder and we’ll priced, then Hankook is a much better, albeit slightly more expensive alternative.

Summary: As I purchased the car in February 2022, I thought I’d best eat through these in the spring and summer with the view of replacing them in the autumn - it seemed silly to waste what were effectively brand new tyres. As the tread depth diminished, however, it became apparent that they would need replacing and I am glad I did in December 2022. Yes, they did still have quite a bit of tread left on them, but if that tread wasn’t doing anything to make me feel confident in the car’s safety then what was the point?! The replacement Hankook Ventus S1 Evo 3 tyres have a significantly shorter braking distance in both the dry and wet, they’re quieter and provide a softer ride, and don’t cause irritating under steer or terrifying oversteer! These tyres are well and truly awful and should be avoided at all costs.
December 10, 2022
Given 46% while driving a BMW M140i (245/35 R18) on a combination of roads for 500 average miles
I got these tyres on my car when i picked it up form the dealership all had over 6mm tread so plan on using them till there toast. in the dry there ok nothing compared to Michelin or other premium brands but as a budget its ok, however in the wet they are shocking, slight mist of rain and the back end just slips out. in my honest opinion as tires are one of the biggest contributing factors for keeping you on the road and getting you form A - B safely i would highly recommend getting something like a Michelin or equivalent
July 28, 2022
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