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Radar Dimax R8 plus View Gallery (1)
205-315/30-55 R17-24 95 sizes 2016

Radar Dimax R8 plus

The Radar Dimax R8 plus is a Ultra High Performance Summer tyre designed to be fitted to Passenger Cars.

5.1
Tyre Reviews Score Based on Professional Tests & User Reviews
Medium Confidence View Breakdown
Dry Grip
76%
Wet Grip
72%
Road Feedback
63%
Handling
63%
Wear
72%
Comfort
67%
Buy again
60%
19 Reviews
68% Average
246,738 miles driven
3 Tests (avg: 33rd)
Radar Dimax R8 plus

Radar Dimax R8 plus

Summer Economy
BETA
5.1 / 10
Based on Professional Tests & User Reviews · Medium 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
Wet
80.6
2x / 3 tests
Dry
59.6
1.8x / 3 tests

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

Braking
70.8
6 tests
Score Components
Professional Tests
Weight: 80%
Tests: 3
Publications: 1
Period: 2023 - 2026
User Reviews
Weight: 15%
Reviews: 19
Avg Rating: 67.5%
Min Required: 5
Consistency
Weight: 5%
Score Std Dev: 0.1
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
2026 Summer Braking Super Tyre Test - How do 52 Tyres Perform in Wet and Dry Braking? Auto Bild 2026 245/45 R19 31/50 2 metrics
2025 Summer Tyre Test Shootout Auto Bild 2025 225/40 R18 31/52 2 metrics
2023 Summer Tyre Market Overview Auto Bild 2023 225/45 R18 36/48 2 metrics
3
Tests
33rd
Average
31st
Best
36th
Worst
Latest Tyre Test Results

Questions and Answers for the Radar Dimax R8 plus

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June 10, 2022

Are the Radar Dimax R8 plus self-sealing in the event of a puncture in the tread?

No they do not have seal technology.
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Review Summary

Based on 18 user reviews

Drivers' experiences with the Radar Dimax R8 Plus are mixed. Many higher-scoring reviews praise its wet and dry grip, stability on long trips, quiet ride, and strong value, with several noting good tread life. However, a significant minority-mostly low-scoring reviews from performance/luxury car owners-report unsettling high-speed instability, floaty handling, and vibrations. Overall, it can perform well for everyday driving and touring, but may not suit more demanding performance applications.

Strengths
  • Wet grip
  • Dry grip
  • Ride comfort/quietness
  • Value for money
  • Long-distance stability
  • Tread life (majority positive)
Areas for Improvement
  • High-speed instability/floaty handling
  • Vibration and tracking issues
  • Poor wear reports (minority)

Top 3 Radar Dimax R8 plus Reviews

Given 18% while driving a BMW 135i (225/45 R18) on mostly motorways for 200 average miles
These came on a BMW 140i I purchased from a dealer. They are not performance tyres, were absolutely lethal and made the car feel unsafe at anything above 100KPH. You felt like the car was a boat wallowing from side to side. They made me feel sick. Changing lanes was a frightening experience and they ruined the cars handling. They also caused the traction control light to flash and cut in on the lightest of bends. For anything with the remotest power buy proper tyres. These are not good.
June 14, 2025
Given 35% while driving a BMW 125i M Sport (245/35 R18) on a combination of roads for 500 average miles
These tyres fit performance cars but they are definitely NOT performance tyres. They may be ok for driving around town at 50kph but feel very unstable on a motorway, even in a straight line (feels more like driving a boat). Since fitting them the Dynamic Stability Control activates regularly (never did that with the Bridgestones) and the car feels very ‘floaty’ in corners - even at average speeds. Will be cutting my losses and going back to the Bridgestones sooner rather than later.
February 16, 2025
Given 69% while driving a Holden 2016 VF SSV Redline (275/30 R20) on a combination of roads for 70,000 spirited miles
I haven’t had these tyres for very long only have them on the rear, but I find them very unstable and a little scary when changing lanes under acceleration and speed on a motorway or dual lane driving.The car seems very lose at the rear.As for everything else about the tyres seem ok so far.But I think I’ll have to replace them due to not feeling confident with the rear handling of the vehicle.
November 18, 2024

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Latest Radar Dimax R8 plus Reviews

Given 84% while driving a Ford Falcon XR6 Ute (245/40 R19) on a combination of roads for 40,000 average miles
I have used these tyres for years now, good price, reliability, good traction in both wet and dry and on long trips, Thousand kilometres plus.
October 16, 2025
Given 86% while driving a Honda Civic Type R (245/30 R20) on a combination of roads for 0 spirited miles
When I bought my 2018 Civic Type R, these were already installed as low profiles. I drove these tires through winter- WINTER. and they worked perfectly fine, even if they were low profiles. But I was grandma driving on winter. Now when I have the chance to make pulls, these tyres never let me down on the mountain curvy roads. 100% I am buying these tyres again, only thicker when I downsize my rims.
August 7, 2024
Given 79% while driving a Jeep (265/50 R20) on mostly motorways for 25,000 average miles
Bought these tyres May 2021 for my Jeep Grand Cherokee did 38,000 km on on them, it’s now Dec 2023. Really quite tyre, ideal for those long hwy trips, grip, towing and handling were fine, no complaints, dirt gravel roads they were predictable in corners. I would have bought again if I could have got them. Great value for the money. I am interested to see if the Maxis HPM3’s will be as quiet.
December 26, 2023
Given 77% while driving a Toyota Avensis estate 1.8 petrol (215/55 R17) on a combination of roads for 1,900 average miles
For information, I am an experienced driver who drives according to the conditions, and can drive a bit over the speed limit if the roads and conditions are good. I have driven about 3000 km(1900miles) and am very satisfied. I have driven in torrential rain and not noticed any aquaplaning (max speed 80 km/h). The tires make a little more noise than previous tires I've had, but not disturbing to me. The sound from the tires was almost annoying at first, but after driving 1000-1500 km, the sound became weaker. I measured the tread depth when they were new, 8 mm. After driving about 3000 km, they are almost 7 mm (6.8 mm). I am very happy with that. Before i have Nexen Nblue HD Plus, and they were very quiet, but after about 7-8000 km there was only about 3.5 mm tread depth. Based on the fact that they are very cheap tires, I must say I am very satisfied! Drives only on asphalt roads.
July 30, 2022
Given 10% while driving a Mercedes Benz CL500 (275/40 R19) on a combination of roads for 1,000 average miles
Tires installed on rear were very unstable and would not track well in the rear. The car was wobbling and un-safe. The mercedes shop could not find anything wrong with the car after 3 hours of checking and test driving. And looking for suspension or steering issues. It was recommended that i change the tires to see what happens . Had to finally replace the tires with P-Zeros which instantly changed the behavior of the car and made it stable as before the The Radar R8plus Very very disappointed - these do not work for luxury performance cars. I checked and others have had similar experiences on A7. I would never buy again. I am returning them and hope they don't give me the runaround.
May 23, 2022
Given 56% while driving a Lexus IS350 (/45 R17) on a combination of roads for 35 average miles
Do not recommend these tires if you are looking for high mileage usage. My Radar Dimax R8 tires only lasted 14K and started coming a part on the inside, couldn't believe it until they were taken off the vehicle for rebalance, because of bad vibration and discovered tire was coming apart.
November 8, 2021
Given 97% while driving a Jaguar 2014 XJL, X351 3.0L Diesel LWB 275BHP (245/40 R20) on a combination of roads for 13,000 spirited miles
I have purchased these tyres one year ago and did over 13000 miles on them. I can now say they are in the mid of their life. I purchased two sizes: 245/40/20 front and 275/35/20 rear. I am very satisfied with them in any weather condition. I feel safe with them. I am not a slow driver- I'm a dynamic driver. I can recommend them with my honest opinion. Negatives - not so deep rim protection.
August 2, 2021
Given 94% while driving a Volkswagen GOLF GTI MK6 remmapped (225/45 R18) on a combination of roads for 2,000 spirited miles
Potentially the tyres to stop skidding, and wheel spin Would highly recommend in the wet!
March 3, 2021
Given 62% while driving a Volkswagen Touareg (225/45 R19 W) on a combination of roads for 3 average miles
So I just had all four tyres (Bridgestone Dueler HP Sport) changed and I went with budget Radar Dimax R8+(DOT 1619). This is an initial review of their performance which mind you is based on a 2.5 mile drive in the wet. Dry Grip: Can't write on this yet as I am yet to drive in the dry. Wet Grip: I was actually impressed by the grip in the wet - they seemed to respond quicker with about same stopping distance to my previous tyres which were rated C for wet (and down to 1.3mm trea depth). Road Feedback: was definitely milder compared to my previous, bumps didn't get feel as crude as before (maybe the "well-inflatedness" of the new ones factored into this). Handling: There was a certain sponginess to how they felt,accelerating seemed a little laggy but taking corners felt slightly better and there was no skidding. Wear: can't say much on ths as they are brand new - came with full 7mm tread depth, I'll see how wear goes - fingers crossed. Comfort: I usually drive with suspension set to comfort(else the mrs throws-up everywhere) but I did feel a slight but noticeable increase in comfort level. Buy again: Only time will tell! Looks: I like the tread pattern - with the reassuring 4 main groves present, not a big-fan of the checquered finish on the sidewall and they look a little pale too (will have to get them darkened somehow). Conclusion: So far so good, I have an eighty-mile roundtrip coming up, hopefully that will give more positive insight.
August 19, 2020
Given 77% while driving a Audi A6 2.0 TDIe C6 model (245/40 R18 W) on a combination of roads for 37,000 average miles
OK guys I don't normally do reviews but maybe it will help someone. I got 4 of Dimax r8+ put on my car 27 months ago just before I went for a long trip from UK to Eastern Europe, 3 weeks = 3500 miles. On my return to the UK there was a storm in Germany rain was pouring and we didn't have any spare time to stop and wait otherwise we would have missed our ferry and even in the heavy rain at the motorway limit speeds these tyres performed extremely well. In the dry no issues at all. I covered 37000 miles in 27 months and fronts have just over 2 mm left (ready for new ones), rear ones got about 4.5mm left. The tyres noise is average not too noisy but not very quiet ether, when it comes to rate the noise it also depends what car in mine average noise is present at low speeds with the windows down, but for the tyres ratings I would say the noise is acceptable. I had softer tyres before slightly more expensive on a different car that performed really well and very quite but only lasted for about 20k. I do recommend these because they will not break the bank and they do good mileage.
July 5, 2020
Given 49% while driving a Infiniti Q50S Hybrid (245/40 R19) on mostly motorways for 12,500 average miles
Got these tires new when I bought my car. After barely 20,000km, there was absolutely no tread left on my rear tires (I've got the pictures to prove it). I use my car for commuting, mostly highway. This is absolutely the worst tire I've ever seen when it comes to wear, stay away from it !!
September 26, 2019
Given 97% while driving a Jeep Grand Cherokee (265/50 R20 W) on mostly country roads for 10,000 spirited miles
These are great tyres. Can't believe how little I paid for these compared to “premium” brands.
I genuinely can't find fault with them.
April 27, 2019
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