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Platin RP 420 View Gallery (1)
185-255/35-65 R15-19 54 sizes 2018

Platin RP 420

Platin Tires High Performance Summer

The Platin RP 420 is a High Performance Summer tire designed to be fitted to Passenger Cars.

4.7
Tire Reviews Score Based on Professional Tests
Limited Confidence View Breakdown
Dry Grip
90%
Wet Grip
83%
Road Feedback
83%
Handling
87%
Wear
73%
Comfort
63%
Buy again
83%
3 Reviews
80% Average
36,000 miles driven
1 Tests (avg: 39th)
Platin RP 420

Platin RP 420

Summer Budget
BETA
4.7 / 10
Based on Professional Tests · Limited Confidence · Updated 18 Jun 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
Category Scores
Wet
74.1
2x / 1 test
Dry
60.3
1.8x / 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
67.6
2 tests
Score Components
Professional Tests
Weight: 80%
Tests: 1
Publications: 1
Period: 2023
User Reviews
Weight: 15%
Reviews: 3
Avg Rating: 80.5%
Min Required: 5
Consistency
Weight: 5%
Score Std Dev: 0.93
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
2023 Summer Tire Market Overview Auto Bild 2023 225/45 R18 39/48 2 metrics
All Tests
View Test Results
1
Tests
39th
Average
39th
Best
39th
Worst
Latest Tire Test Results
2023 Summer Tire Market Overview
225/45 R18 • 2023
39th/48
View Test Results
Size Fuel Wet Noise
15 inch
195/55 R 15 85 V C B 71
16 inch
205/55 R 16 91 V C B 71
205/55 R 16 94 W XL C B 72
205/60 R 16 92 V C B 71
215/60 R 16 99 H XL C B 72
17 inch
205/50 R 17 93 Y XL C B 72
215/45 R 17 91 Y XL C B 72
215/55 R 17 98 Y XL C B 72
225/45 R 17 94 Y XL C B 72
225/50 R 17 98 Y XL C B 72
225/60 R 17 99 V C B 71
235/65 R 17 108 V XL C B 72
18 inch
225/40 R 18 92 Y XL D B 72
235/60 R 18 107 W XL C B 72
245/40 R 18 97 Y XL C B 72
245/45 R 18 100 Y XL C B 72
19 inch
235/35 R 19 91 Y XL D B 72
View All Sizes and EU Label Scores for the Platin RP 420 >>

Questions and Answers for the Platin RP 420

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Top 3 Platin RP 420 Reviews

Given 87% while driving a Nissan Juke (215/55 R17) on a combination of roads for 18,000 spirited miles
Tire is a great choice, top notch quality with a great price. Lasted for more than 18,000 miles with fast driving. Grips incredible, especially taking in consideration its price. Definitely recommend them and buying them again.
Helpful 819
June 15, 2025
Given 87% while driving a Alfa Romeo MiTo (195/55 R16) on a combination of roads for 15,000 average miles
Really good value for this price category. Good handling in wet and also in dry roads. Maybe a bit more noisy..
Helpful 873
November 5, 2024
Given 67% while driving a BMW 520i (225/45 R17) on a combination of roads for 3,000 easy going miles
Fitted on front axle only. My driving style is absolutely normal. On dry surface they are very good and quite good on wet as well, despite the tarmac of the roads where I live is not water draining at al. Handling and steering are not very precise because the shoulder of the tire is not stiff enough, despite it's XL rated. Even if inflated at max load pressure and XL, the tire feels the weight of the car. But the BIG downside is the noise. They are extremely noisy, even more than previous Riken that I replaced because old and noisy due to too hard and cracked compound. I would by these Platin only if much less noisy, because I like the grip they have on tarmac.
Helpful 918
May 16, 2021

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