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Uniroyal MS plus 66

The Uniroyal MS plus 66 is a Touring Winter tyre designed to be fitted to Passenger Cars.

6.5
Tyre Reviews Score Based on User Reviews
Limited Confidence View Breakdown
Dry Grip
82%
Wet Grip
94%
Road Feedback
81%
Handling
87%
Wear
92%
Comfort
91%
Buy again
99%
8 Reviews
89% Average
16,310 miles driven
5 Tests (avg: 10th)
Uniroyal MS plus 66

Uniroyal MS plus 66

Winter Mid-Range
BETA
6.5 / 10
Based on 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
Score Components
Professional Tests
Weight: 80%
Tests: 5
Publications: 2
Period: 2010 - 2012
User Reviews
Weight: 15%
Reviews: 8
Avg Rating: 89.5%
Min Required: 5
Consistency
Weight: 5%
Score Std Dev: 2.42
History Points: 6
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
2012 Auto Bild Top 15 Winter Tyre Test Auto Bild 2012 205/55 R16 14/15 0 metrics
2012 European Tyre Test - 205/55 R16 ADAC 2012 205/55 R!6 15/16 0 metrics
2012 Auto Bild 42 Winter Tyre Braking Test Auto Bild 2012 205/55 R16 10/43 0 metrics
2011 Auto Bild Winter Tyre Test Auto Bild 2011 225/45 R17 5/12 0 metrics
2010 European Winter Tyre Test ADAC 2010 225/45 r17 4/10 0 metrics
5
Tests
10th
Average
4th
Best
15th
Worst
Latest Tyre Test Results
15th/16
14th/15
Stable handling on snow, good aquaplaning resistance
Unstable handling on wet roads, moderate comfort, poor mileage
Fair

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Top 3 Uniroyal MS plus 66 Reviews

Given 93% while driving a Land Rover Freelander TD4 (BMW M47R) (225/55 R17 V) on a combination of roads for 10 average miles
Bought a set of four for winter use. I may have a Freelander but your car is only as good as your tyes. These have been great in the winter. Not just snow but when it is cold, wet and horrible. All four corners seem clued to the road. Not many people drive to close behind you due to all the water/spray they chuck out.
Ask a question | Helpful 843
December 12, 2018
Audi ALLROAD 2.5 TDI (225/45 R17) on mostly country roads for 0 average miles
We live in the midi Pyrenees, in the foot hills of the mountains, so get a lot of snow, I had uni royals winter tyres fitted and I was able to drive up to our local ski resort which hadn't been snow plowed, most people were fitting chains at the bottom to get up, we just carried on, this was in a renult scenic normal car, a few small slips here and there but we got up! I think these tyres represent great value for money, we now have an Audi all road and have just ordered our uni winter tyres, 4 tyres and delivered to France for under 500 pounds!
August 20, 2013
Given 90% while driving a SEAT EXEO ST TDI 170CR (225/45 R17) on a combination of roads for 8,000 average miles
used on our exeo sport , audi a4 ,these are a little softer in peak of summer but good all season as wetravel through lots mud water not much snow last year great for tailgaters due to sheer amouny of water displaced xl for our sport estate allways had wranglers on the 4x4 these are better in mud etc .
January 6, 2013
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Latest Uniroyal MS plus 66 Reviews

Given 90% while driving a Lexus IS200 (205/50 R17) on a combination of roads for 300 average miles
Not run these very long, so can't comment on longevity, but so far I've been thoroughly impressed. Bought these second hand (allegedly with under 2000 miles on them) for this winter, and fitted them Dec 1st, and so far used them once in snow, and a few times in the rain.

SNOW : massively impressed. Granted it was only a couple CM, but being a RWD car, I was expecting slip and spin on the snow and ice, and the day it snowed 2 BMW's and a Merc all tried and failed to get out of the estate (up a slope). I just cruised out like it was nothing. Likewise, down and up the next little hill, cars were struggling, even FWD, but I just poodled up with no TRC light flashing and no sliding. Their performance on the white ice was equally impressive; both moving off from standstill, and braking to standstill too. The only time the TRC light came on was moving from standstill on black ice, with just a little bit of off camber tramping - but then, you can't change the laws of physics, so still very impressed.

RAIN : Again, very impressed. Long drive (175mi) on the M11/M25/M4/A4 this eve, been raining all day more or less non stop and LOTS of standing water, including some deepish stuff on the A4. Granted, you slow down for the deeper stuff, but on the motorways, doing 70-80mph and hitting the standing water, there was not even a hint of aquaplaning. No snatching, no pulling, nothing. Just glided through. Even crossing the white lines, which can sometimes be a little slippery in the wet, gave no indication you were doing so. They are a VERY reassuring tyre in the wet, and drove nice and true, with healthy braking.

DRY : First thing I noticed when comparing them to the Hankook V12 Evo summer tyres I swapped from, was that the Uniroyals are a bit softer, in feel, than the Hankooks. This may or may not be down to, or at least attributed to, the taller side walls (Hankook's are 215/45's and the Uniroyals are 205/50's). It's possible the side walls are more forgiving than the Hankook's, resulting in a tiny bit more "roll" when cornering. But that's not to say the grip is "off" with the Uniroyals; the Hankook's are just a little bit more sure-footed is all. A great tyre tester in the dry (and wet for that matter) is the S-bend slip road from the M25 to the M11; nicely banked, long sweeping S-bend that tightens just after each apex. The Hankook's hold through that, in the dry, at about 80mph. The Uniroyals held nicely at about 70. I didn't push them harder through it, as it was only the 2nd day I had them on, but they'd probably hold just as nice at 75, though I'm not sure they'd hold identically to the Hankook's at 80mph.

All in all, for the colder, wetter, winter months, these Uniroyals are a great bet, in my opinion, and so far I've been really impressed. Only time, and mileage, will tell how long they last. Likewise, only wear will indicated when their snow capabilities drop off, but for now they've got about 7-8mm of tread across each tyre, and they coped great in the (albeit little) snow we've had, and were fantastic on the wet, rain soaked motorways. They are not as quiet as my Hankook summer tyres, but by no means are they a noisy tyre. You have to expect a little increase in road noise, considering the larger grooves and multitude of sipes on them.
December 22, 2012
Given 92% while driving a Peugeot 307 (190/65 R15 H) on a combination of roads for 0 average miles
Very good tyre in dry and wet conditions. Grip in snow is superb, although on icespots could do better!
Great tyre quality/price!
Would definately buy again!
Big difference with normal summer tyres for sure!
February 5, 2012
Check out how the BEST all seasons tyres perform against premium summer and winter tyres!
Given 83% while driving a Audi A4 Avant1.9 Tdi SE (195/65 R15) on a combination of roads for 8,000 average miles
I recently bought Uniroyal tyres as my first ever winter tyres. It is the best purchase i have ever made and have felt the benefit of the extra grip and road handling in the wet and colder mornings. The give much better grip when braking and make the feel of driving much safer.
November 29, 2011