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Radar Dimax R8 View Gallery (1)
205-275/30-60 R17-20 30 sizes 2017

Radar Dimax R8

Radar Tyres Ultra High Performance Summer Next

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

1.7
Tyre Reviews Score Based on Professional Tests & User Reviews
Limited Confidence View Breakdown
Dry Grip
66%
Wet Grip
49%
Road Feedback
53%
Handling
53%
Wear
66%
Comfort
59%
Buy again
53%
38 Reviews
57% Average
233,766 miles driven
2 Tests (avg: 41st)
Radar Dimax R8

Radar Dimax R8

Summer Economy
BETA
1.7 / 10
Based on Professional Tests & 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
Category Scores
Dry
69
1.8x / 1 test
Wet
66.9
2x / 1 test
Cross-Category Performance

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

Braking
67.9
2 tests
Score Components
Professional Tests
Weight: 80%
Tests: 2
Publications: 1
Period: 2017 - 2020
User Reviews
Weight: 15%
Reviews: 38
Avg Rating: 57%
Min Required: 5
Consistency
Weight: 5%
Score Std Dev: 0.69
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
2020 Tyre Market Overview Braking Test Auto Bild 2020 245/45 R18 35/49 2 metrics
2017 Auto Bild Summer Tyre Shootout Auto Bild 2017 225/50 R17 47/43 0 metrics
All Tests
View Test Results
2
Tests
41st
Average
35th
Best
47th
Worst
Latest Tyre Test Results
2020 Tyre Market Overview Braking Test
245/45 R18 • 2020
35th/49
2017 Auto Bild Summer Tyre Shootout
225/50 R17 • 2017
47th/43
Size Fuel Wet Noise
17 inch
225/60R17 103 V XL C B 72
View All Sizes and EU Label Scores for the Radar Dimax R8 >>

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Review Summary

Based on 36 user reviews

For the Radar Dimax R8, driver opinions are highly mixed. Many budget-focused users praise dry grip, value, and long tread life, but a substantial number report poor wet grip, high-speed instability, and rising noise as they wear. Overall, the tyre suits light, non-spirited driving in dry conditions but draws serious complaints in wet performance and noise.

Strengths
  • Good value/price
  • Decent dry grip and handling for the price
  • Long tread life/wear
  • Acceptable comfort/ride
  • Quiet when new (some reviews)
Areas for Improvement
  • Poor wet grip/traction
  • Noisy (worsens with wear)
  • High-speed instability/twitchiness
  • Inconsistent quality/performance

Top 3 Radar Dimax R8 Reviews

Given 90% while driving a Toyota Alphard GGH30 (255/35 R21) on mostly motorways for 0 spirited miles
I could not find any tyres with this price range for my tyre size 255/35R21. Radar Dimax R8 has a great size range. At this price they are unbeatable in value. This is my second purchase. Will continue with this brand.
Ask a question | Helpful 1039
February 12, 2025
Given 84% while driving a Subaru Forester 2.5i (225/50 R17) on mostly town for 0 spirited miles
Radar Dimax tyres did well on my super super low 07 Subaru Forester.
I drive the car hard and they handled well and I used them right up until they were totally bald. Maybe the treadwear could have lasted a bit longer but I'll take that for how well they did. Cheers
Ask a question | Helpful 1054
February 12, 2024
Given 100% while driving a BMW 530D M sport (245/45 R19) on a combination of roads for 500 spirited miles
This is a first for me to buy budget tires.
I have to say i am very impressed with the grip and the handling and the comfort much better than the Bridgestone they have replaced.
I don't do reviews but when i was buying these i looked at the reviews and it was a bit mixed, so all i have to say is i have put two tyres on my BMW530d for less than the cost of one from a brand name, and they are brilliant.
i can't tell you how happy i am with them
Ask a question | Helpful 877
March 6, 2024
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Latest Radar Dimax R8 Reviews

Given 47% while driving a BMW Z4 (255/30 R19) on a combination of roads for 12,000 easy going miles
Only do about 4000miles a year. The tyres were brand new when I bought the car I’ve done 12000 miles & thought all was good until yesterday when I got a flat tyre warning - on checking there was a 10 inch rupture on the inside wall of the rear near side . The other is showing signs of cracking on so it’s going to be replaced tomorrow. I certainly wouldn’t have again.
Ask a question | Helpful 825
September 1, 2023
Given 10% while driving a BMW 330i (225/45 R17) on a combination of roads for 250 spirited miles
I put them on the rear of my 330i and as soon as you go above 65mph the back end becomes twitchy, its almost like they deform to a oval shape and the car shakes left and right, honestly not worth buying!
Ask a question | Helpful 845
September 25, 2022
Check out how the BEST all seasons tyres perform against premium summer and winter tyres!
Given 30% while driving a BMW 320D (225/45 R18) on mostly motorways for 3,000 spirited miles
BMW 320d GT. changed to these on the two rear tyres, just before a road trip from Ireland to Berlin. Oh dear, these are clearly not suited. The car is twitchy and swimmy at anything over 100kmh. Have to keep two hands on the wheel and concentrate to keep it going in a straight line. It’s almost divergent. Really unnerving. At Autobahn speeds of over 160kmh it’s a real white knuckle ride. Other peeps are clearly having a different and good experience with these but I can say unequivocally that they are not to be used on a 320d GT.
Ask a question | Helpful 795
August 9, 2022
Given 33% while driving a BMW 220d Sport Auto (225/45 R17) on mostly motorways for 100 average miles
I put theses tyres on as a cheap alternative and cost effective. They are awful past 50mph in corners and the TC light flickers at the hint of a bend. I am having them removed and replaced for safety concerns. If all you use them for is little town journeys then they'll be fine - do not take on wet motorways!!
Ask a question | Helpful 781
May 31, 2021
Given 73% while driving a BMW 335d (245/35 R19 W) on a combination of roads for 2,000 average miles
Driven couple thousand and no issues at all. Cant tell diff between them and my previous Michelin tyres..
Ask a question | Helpful 806
August 12, 2020
Given 83% while driving a Ford Mondeo Titanium X (235/40 R18 R) on a combination of roads for 10 average miles
Had these on my 2.5l Turbo Ford Mondeo for last four years, absolutely no issues with them at all; a great, cheap all round tyre. And I have been known to drive in a spirited way sometimes!
Ask a question | Helpful 883
December 9, 2019
Given 41% while driving a Jaguar xf premium luxury (255/35 R20 W) on mostly town for 5,000 average miles
Look good but perform badly. I don't believe the tyres EU ratings whatsoever. The tyres are noisy and wet grip levels do not reflect a B rating.
Ask a question | Helpful 923
December 5, 2019
Given 23% while driving a Vauxhall Nova (225/45 R17 V) on a combination of roads for 100 spirited miles
Cheap dangerous tyres
They are very hard wearing but everything else is bad
Dont fit these tyres to ur car u have being warned
Ask a question | Helpful 1082
December 31, 2018
Mercedes Benz (255/30 R19 W) on mostly motorways for 25,000 average miles
Bought my E class a year ago. The dealer fitted these new so I expected them to be budget tyres. Normally I fit Conti 5s to my Mercs. So far the main plus is the wear. I've done 25000 since buying the car, mainly motorways, and I still have 5mm easy all round. The fronts generally last forever anyway but even on the rear, I can get another 6 months out of these tyres. For anyone who does high mileage, that's a real heads up. I think road noise is higher but performance is fine; I don't drive in the limit. I probably wouldn't choose these tyres bit I cannot really fault them.
Ask a question | Helpful 932
October 20, 2018
Given 93% while driving a BMW 730Ld (275/35 R20 W) on mostly motorways for 10,000 easy going miles
Bought these Radar R8 runflat Tyres for my 7 Series
They are half the price of Goodyear/Pirelli and last at least 90%
As long.
As I do huge mileages, it makes sense for me to use these
They balance nice (with less weight required than Pirelli)
Also are very quiet, and so far have done 10k miles and have over
6-7mm left so fingers crossed will get to 30k miles
Justyn
Ask a question | Helpful 997
October 3, 2018
Jaguar (275/45 R20 W) on mostly motorways for 100 average miles
I went to purchase my usual Landsail tyres that I've had for a number of years and always found them very good value for money but the dealer did not have them and sold me 2 radar tyres for £180.
4 days and 70miles later my wheels were removed for a refurb and I was amazed the inside of tyre had a bulge all around the inner edge. I had not merged it or anything like that. Went back to the garage who advised that all they could do was fill out a form but radar will claim it's my fault and the claim will be rejected. I changed back to Landsail. If anyone offers you these tyres do not accept them. Awful tyres with awful customer service.
Ask a question | Helpful 899
July 17, 2018
Given 30% while driving a Jaguar XJ (X351) SWB 3.0d (275/45 R20 W) on mostly motorways for 100 average miles
I went to purchase my usual Landsail tyres that I've had for a number of years and always found them very good value for money but the dealer did not have them and sold me 2 radar tyres for £180.
4 days and 70miles later my wheels were removed for a refurb and I was amazed the inside of tyre had a bulge all around the inner edge. I had not merged it or anything like that. Went back to the garage who advised that all they could do was fill out a form but radar will claim it's my fault and the claim will be rejected. I changed back to Landsail. If anyone offers you these tyres do not accept them. Awful tyres with awful customer service.
Ask a question | Helpful 909
July 17, 2018