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Haida HD921 View Gallery (1)
185-305/25-65 R14-24 40 sizes 2013

Haida HD921

The Haida HD921 is a High Performance Summer tire designed to be fitted to Passenger Cars.

4.9
Tire Reviews Score Based on User Reviews
Limited Confidence View Breakdown
Dry Grip
60%
Wet Grip
40%
Road Feedback
47%
Handling
45%
Wear
49%
Comfort
38%
Buy again
29%
43 Reviews
44% Average
248,400 miles driven
Haida HD921

Haida HD921

Summer Budget
BETA
4.9 / 10
Based on User Reviews · Limited Confidence · Updated 23 Feb 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
Score Components
Professional Tests
Weight: 80%
Tests: 0
Publications: 0
User Reviews
Weight: 15%
Reviews: 43
Avg Rating: 43.9%
Min Required: 5
Consistency
Weight: 5%
Score Std Dev: 0.11
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
All Tests

Sorry, we don't currently have any magazine tire tests for the Haida HD921

Size Fuel Wet Noise
15 inch
195/55R15 89 V XL D C 72
20 inch
275/55R20 117 V XL D C 73
View All Sizes and EU Label Scores for the Haida HD921 >>

Questions and Answers for the Haida HD921

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Size Price Range  
215/50 R17 $120.99 - $120.99 (1 Price) Compare Prices >>
245/30 R22 $127.96 - $127.99 (2 Prices) Compare Prices >>
245/40 R18 $128.99 - $128.99 (1 Price) Compare Prices >>
275/40 R20 $154.99 - $154.99 (1 Price) Compare Prices >>
Available in 35 tire sizes - View all.

Top 3 Haida HD921 Reviews

Given 43% while driving a Renault Master (2018) (225/45 R17) on mostly motorways for 15,000 easy going miles
in case its the wrong model I had the AT commercial load tires, lasted 6 months , absolute crap, premature were, scalloping , all had to be replaced crap, less that 20,000km
June 16, 2025
Given 10% while driving a Ford Cmax (215/50 R17) on mostly country roads for 300 miles
Had 2 split in as many weeks never had a tire split before
June 30, 2025
Given 47% while driving a Mercedes Benz A45 (235/45 R18) on a combination of roads for 5,000 average miles
Tires already on my car a Mercedes-Benz A45 AMG. Worst aspect is on wet roads, I will lose the rear end even going round a roundabout, have changed to Maxxis better wet rating than Goodyear eagle F1.
August 7, 2025

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Latest Haida HD921 Reviews

Given 40% while driving a Audi S5 (255/35 R19) on mostly town for 18,000 spirited miles
They are mostly ok when they've got lots of tread in the dry, side walls don't hold up well to fast driving/cornering, expect lots of understeer, they got worse and worse as they wore down, in the wet they were ok but as they've wore down to 4mm and below I would rate these tires as down right dangerous in the rain, expect them to aquaplane, if you have them on all 4 and you are going 70, I would expect it your car to probably spin out, thankfully I only have them on my fronts as they were on there when I bought the car, do not buy these unless you absolutely have too.
December 3, 2025
Given 50% while driving a Nissan Maxima (225/45 R17) on mostly town for 1,000 spirited miles
Bought a set of 4 for my 2002 Maxima, at speed over 70km/h they get really noisy, to the extent I had my wheelbearings checked.
February 5, 2025
Given 34% while driving a Audi A6, 3.2L, Quattro (245/40 R18) on a combination of roads for 3,000 easy going miles
Came fitted on the front of a used A6. They made so much road noise I thought both front wheel bearings needed replacing. In dry corners they felt like they rolled onto the sidewall and would snap into understeer without warning. In the wet they were terrible. Overall the front of the car never felt connected and would constantly fidget over any slight imperfection. There are some respectful budget tires out there, but these were just terrible.
December 14, 2024
Given 78% while driving a Mazda Mazda Miata (195/45 R15) on a combination of roads for 0 spirited miles
I have 195/45/15rs on my Miata and they handle good in dry and wet I can be drifting in the rain and they will catch any time I want them to I have no troubles braking with them ether I have driving in the snow the past few days no chains and no problems I cruise thru snow and ice with out any problems they remind me of toyo proxies tr1s but with better traction in the rain and snow
December 2, 2022
Given 33% while driving a Honda Accord CTDi (225/45 R18) on a combination of roads for 0 average miles
When wet is dangerous!
August 23, 2022
Given 29% while driving a Volkswagen Transporter (275/40 R20) on mostly motorways for 10,000 easy going miles
I hate, hate, hate these tires. I’ve never known a tire to make so much noise. The handling is all over the place. Whoever at Camper King decided to bundle these with a £55k conversion, instead of adding an extra £250 for at least a mid-tier brand, is an idiot.
November 25, 2021
Given 25% while driving a Citroën berlingo (225/45 R17) on mostly town for 0 miles
Bought a set of alloys with these tires on brand new... Well after 3days driving in the dry conditions they where alright but once the roads are wet these tires are the worst I've ever had near put the van off the road turning a corner van slid out thankfully there was no on coming traffic, even breaking coming to roundabouts they slide never would i have these again..they are a dangerous tire once the roads are wet
May 20, 2021
Given 18% while driving a Volkswagen 147tsi highlin (225/40 R18) on for 0 miles
Bought car with these fitted on Tuesday. By Thursday had Michelin Cross Climate+ fitted to front axle, after 2 huge understeer moments on roundabout. Car handling like rear wheel drive slick tires in wet. In my opinion these tires are dangerous. Cross Climate+ £40 dearer, worth every penny.
March 11, 2021
Given 45% while driving a Volkswagen Transporter (275/40 R20 W) on a combination of roads for 10,000 average miles
Very cheap new tires that were fitted on the vehicle that I recently bought. The front tires have completed less than 10,000 miles in 10 months on my VW T6 and they are almost down to the wear limit indicators. The road noise is awful and as they wear down the more of a whining noise can be heard. I would not recommend them and will be fitting Pirelli, Michelin, Good year or Bridgestone next time. You get what you pay for but these are budget tires on a high level.
July 24, 2019
Ford Fiesta (195/45 R16) on a combination of roads for 0 average miles
I am absolutely furious that an unscrupulous dealer sold me this (BUDGET) tire when I asked for something "COMPARABLE" and "COMPATIBLE" with what had been on (ie when I needed a replacement following a puncture).

The tire being replaced was a Bridgestone (ie a PREMIUM tire) and clearly there is no comparison whatsoever - except for the price I was charged!
November 28, 2018
Given 30% while driving a Volkswagen Transporter (275/40 R20 W) on mostly motorways for 10,000 easy going miles
I had a brand new set of these tires already fitted to my VW transporter when I bought it.
I took the van into my local garage to have them check the wheel bearings, even though I couldn't feel any play myself, the road noise was unbearably loud and droning. The garage confirmed all the bearings were fine.
After just 5 months I noticed the inner treads were wearing uneven so had a 4-wheel laser alignment carried out.
The vehicle was already well within factory tolerances and so no adjustments were made!
I swapped the tires front to rear to try even out the wear. They've lasted just less than 10 months and less than 10,000 miles and they're already at their wear limit and STILL noisy as hell!
I've since swapped the tires for a quality set of Continental SportContact 5's and the difference is outstanding! My van is quiet - I can hear people talking whilst driving on the motorway and there's much better road feel.
If you need a cheap / budget tire then I'd advise looking elsewhere - buy cheap, buy twice with these horrible tires.
October 19, 2018
Given 33% while driving a Audi A6 Avant 2.0TDI (225/45 R17) on mostly motorways for 5,000 average miles
I bought this car just b4 Xmas and it had these tires on 245/40/18 these tires are ok in the wet and dry and even in the snow i was able to go up my road that is on a hill but the worst thing about these tires are the road noise I was convinced that all my wheel bearings were gone and needed changing but after having them checked I have noticed its the tires if you use the moterway alot dont even bother looking at these tires it will drive you crazy i would rather spend a little more.I will be changing these at my first opportunity
March 26, 2018
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