Tyre Wear

[Cyker]

Came across this, seems like it is just a very soft tyre!

 

[Yaris_Cross]

I buy the cheapest tyres i can find i dont drive my car like i have stolen it and i have never had an accident that could have been put down to cheap tyres.

[hind]

Yet there are situations which are not predictable, like a kid running across the road from behind the parked truck. Won't be your fault of course, but sometimes that one meter of braking distance can really matter

[MikeSh]

17 minutes ago, hind said:

not predictable, like a kid running across the road from behind the parked truck.

Any advanced driving instruction will say that is very predictable. If you can't see what's there you should assume it's something like that and prepare accordingly. (Only 1% of drivers do that of course.)

17 minutes ago, hind said:

sometimes that one meter of braking distance can really matter

Not really. At 30 mph stopping distance (after reaction time) is about 15 metres, so about 2 mph per metre of travel. So 1 metre better will reduce the speed at impact by 2 mph. Best case you'll not hit something vs hitting it at 2 mph. If you hit a person at 16 mph rather than 14 mph the difference really isn't going to be detectable - car design, exact point of impact, etc, etc, will be bigger factors in the injury/damage result.

Spending £££ on an advanced driving course (and learning from it) would be a better safety result than that amount spent on 'better' tyres.

[Chas G]

21 minutes ago, MikeSh said:

 

Not really. At 30 mph stopping distance (after reaction time) is about 15 metres, so about 2 mph per metre of travel. So 1 metre better will reduce the speed at impact by 2 mph. Best case you'll not hit something vs hitting it at 2 mph. If you hit a person at 16 mph rather than 14 mph the difference really isn't going to be detectable - car design, exact point of impact, etc, etc, will be bigger factors in the injury/damage result.

 

Kinetic energy = 1/2 Mass × Velocity squared 🤔

[Big_D]

41 minutes ago, MikeSh said:

Spending £££ on an advanced driving course (and learning from it) would be a better safety result than that amount spent on 'better' tyres.

I totally agree. I worked for a Company where you had to complete an advanced driving course before you could drive their company cars. Although it cost me nothing, it was one of the best courses I have ever done. Well worth every penny I never spent and certainly well worth my time.

[Chas G]

2 hours ago, Chas G said:

Kinetic energy = 1/2 Mass × Velocity squared 🤔

@MikeSh

Just occurred to me that maybe the collision is one of conservation of momentum, not kinetic energy, in which case you may be correct in what you say?????

[MikeSh]

2 hours ago, Chas G said:

Kinetic energy = 1/2 Mass × Velocity squared 🤔

And when did a pedestrian ever cause a car to stop on impact?

Never. 

People who will profit from selling tyres will max out the margins, but the reality is far more nuanced. 

Yes, in the 0.01% chance you have an accident the extra 2mph you might be travelling might move the equations a bit ... but statistically it'll be well inside the error bars. 

Buy tyres that suit your budget or style of driving.

[anchorman]

On 8/8/2024 at 1:16 PM, YarisHybrid2016 said:

13,000 miles and I already need a new set of front tyres! 

Anyone else have Bridgestone 215/40 R18 89Y and needing new tyres this quickly?!

I know I have a heavy foot, but is this normal?

Both rears are at 4.5 mm, FR at 3.0 mm, FL at 2.5 mm. Tyre wear appears fairly consistent across the width, so doesn't appear to be related to tracking issues (I have it checked often anyway).

My Gen.3 Yaris on 16" went ~30,000 miles between tyres.

I do not rotate them; I just run them until the fronts need changing, then swap rear->front and and put new tyres on the back.

Out of curiosity, we checked the YC, and its tyres are much healthier/more in line with expected wear.

It must be noted that I have done many, many more short trips since getting this car than my Gen.3 ever saw. I consider a "short trip" anything less than 25 miles round-trip, though much of it is 30 MPH.

A couple of months back we ran both cars on a 300 mile round-trip (mostly motorway) and both cars reported a very cool 101 (YC) and 96 (GR Sport) MPG. I'm pretty darn happy there isn't anything untoward with the car (dragging brakes or other anomalies).

For Pete’s sake, I thought I’d sold my very good condition 16 inch tyres when I saw the title 🙄

[YarisHybrid2016]

47 minutes ago, anchorman said:

For Pete’s sake, I thought I’d sold my very good condition 16 inch tyres when I saw the title 🙄

What does that mean?

I will say that I don't understand people who change "partially worn" tyres, and I understand even less the people who re-sell such garbage.

Why were they changed in the first place? Why would anyone want used tyres of unknown origin and history on their vehicle?

My opinion on tyres is: it's all that is between you and your £30k (or more) car going off the road. Why risk that to save £5?

The Bridgestones are OEM, so I would hope they were half decent at least. I have been happy with their performance overall.

[YarisHybrid2016]

13 hours ago, Cyker said:

Came across this, seems like it is just a very soft tyre!

 

Very interesting. As always, ignore the size of the graphs, and look at the raw data! 15 ft between "best" and "worst".

I don't like how he presented the data...missed out dry performance, and was clearly pushing a certain tyre brand and model, while offering the least data on it. Otherwise, seems I'll stick with the OEM.

The Continental showed quite a marked degradation in performance, which shows things are more complex than simply compound.

I'd like to see more technical testing, such as lateral grip. This matters when cornering, and isn't anywhere near the same as longitudinal grip. It's a big reason I'm against low rolling-resistance "eco" tyres. They have reduced grip by definition, which is just silly.

On the topic of advanced/safe driving, I already account for the fact people can't hear the car (despite AVAS). The Gen.3 didn't have it, and I learned early on just how "invisible" it was. Even now, I have people show surprise at my presence despite AVAS (it assumes people don't have hearing problems).

[hubrad]

19 hours ago, FROSTYBALLS said:

Probably due to inflation  .......

BadoomTISSSHHHH!

[anchorman]

1 hour ago, YarisHybrid2016 said:

What does that mean?

I will say that I don't understand people who change "partially worn" tyres, and I understand even less the people who re-sell such garbage.

Why were they changed in the first place? Why would anyone want used tyres of unknown origin and history on their vehicle?

My opinion on tyres is: it's all that is between you and your £30k (or more) car going off the road. Why risk that to save £5?

The Bridgestones are OEM, so I would hope they were half decent at least. I have been happy with their performance overall.

It would be a bit more civil to find out more about it than to behave like a brat and accuse me of peddling garbage.  Because I’m effectively on call and have to leave the Peak District at any time 24/7, the first stop I make with all of my cars is to have all season tyres fitted which renders a set of virtually new standard tyres unused.  Somebody up there in this post buys the cheapest tyres available and I personally would always prefer nearly new second hand and in any case, you’ll never stop those on a budget trawling eBay for tyres they know nothing about.  Mine are pukka original equipment tyres so you wind your neck in and think about what you’re saying before you blurt.  

[FROSTYBALLS]

2 hours ago, YarisHybrid2016 said:

I have people show surprise at my presence despite AVAS (it assumes people don't have hearing problems).

The system is really intended to assist pedestrians with sight issues.

[Cyker]

4 hours ago, YarisHybrid2016 said:

Very interesting. As always, ignore the size of the graphs, and look at the raw data! 15 ft between "best" and "worst".

I don't like how he presented the data...missed out dry performance, and was clearly pushing a certain tyre brand and model, while offering the least data on it. Otherwise, seems I'll stick with the OEM.

The Continental showed quite a marked degradation in performance, which shows things are more complex than simply compound.

I'd like to see more technical testing, such as lateral grip. This matters when cornering, and isn't anywhere near the same as longitudinal grip. It's a big reason I'm against low rolling-resistance "eco" tyres. They have reduced grip by definition, which is just silly.

On the topic of advanced/safe driving, I already account for the fact people can't hear the car (despite AVAS). The Gen.3 didn't have it, and I learned early on just how "invisible" it was. Even now, I have people show surprise at my presence despite AVAS (it assumes people don't have hearing problems).

That particular video was to highlight difference between Michelin's touring, UHP and UUHP tyres so that's why it's focused more on them - The man is disturbingly obsessed with tyres so there probably is a lot more in-depth video with more stats on his channel  

Sadly he has veered more toward the UHP/ UUHP side of things so less informative for normal people as of late... (Although with even a flippin' normal Yaris having 18" rims now, at this rate almost all cars will be forced to use low-profile UHP/UUHP tyres!).

 

As for the AVAS, I think people expect too much - I could literally drive right up to someone in my old Mk1 Yaris D4D, and if people couldn't hear that clattery lump then the AVAS has no chance!!!

I've seen V8 Scania artics drive right up to people walking in the middle of the road who were completely oblivious until they sounded the horn (At which point the exchange of verbal abuse usually began  )

 This is why a good road safety tip is just to assume all pedestrians are deaf blind suicidal lemmings and to give yourself veering/braking distance for when they inevitably just walk out in front of you, EVEN if they are clearly looking at you and you'd assume can see you coming (This is something I experience depressingly often, esp. in 20mph zones... Like, they can see how far away I am and that I'm coming... Why don't they just cross then when I'm far away, instead of waiting until I'm within collision distance and THEN crossing?! )

 

[jthspace]

1 hour ago, Cyker said:

Why don't they just cross then when I'm far away, instead of waiting until I'm within collision distance and THEN crossing?! )

 

Spatial Awareness vs Brain Cell - hence Toyota safety systems - rather than common sense.

[jthspace]

5 hours ago, YarisHybrid2016 said:

On the topic of advanced/safe driving, I already account for the fact people can't hear the car (despite AVAS). The Gen.3 didn't have it, and I learned early on just how "invisible" it was. Even now, I have people show surprise at my presence despite AVAS

On my ex-Mitsubishi PHEV you could turn their equivalent of AVAS off which seemed crazy. People had also hacked it to play Star Wars theme.....

[AndyN01]

1 hour ago, Cyker said:

.......... Why don't they just cross then when I'm far away, instead of waiting until I'm within collision distance and THEN crossing?! )

 

Because that way they don't get the opportunity for "compensation" when they get hit.

The lack of awareness/understanding of the long term effects of "damage" to the body obviously isn't big enough to overcome the greed of the payout.

Or maybe they're just oblivious to anything and everything around them. 🤪

[Yaris_Cross]

16 hours ago, hind said:

Yet there are situations which are not predictable, like a kid running across the road from behind the parked truck. Won't be your fault of course, but sometimes that one meter of braking distance can really matter

I have been driving 43 years and i carry a *CPC card which i have had for 9 years in that time i have never had  to do a full on emergency stop tailgating is one of my pet hates so i always leave plenty of room between me and the vehicle in front and in built up areas i drive to the road conditions not the speed limit,  i have never had an accident because i drive on cheap tyres or drive faster than is sensible for the road conditions therefore i will happily carry on using chap tyres.

*Driver Certificate of Professional Competence (Driver CPC) training is continual professional development which carries on throughout a professional bus, coach or lorry driver's career. Once you pass your Driver CPC, you'll be issued with a Driver Qualification Card (DQC).

 

[Yaris_Cross]

6 hours ago, YarisHybrid2016 said:

My opinion on tyres is: it's all that is between you and your £30k (or more) car going off the road. Why risk that to save £5?

Can you give me a link to where i can buy a top brand tyre for £5 more than a budget one i will change all 4 to  the top brand ones next time they need changing if you can  😉

[Rhymes with Paris]

2 hours ago, Cyker said:

This is why a good road safety tip is just to assume all pedestrians are deaf blind suicidal lemmings and to give yourself veering/braking distance for when they inevitably just walk out in front of you, EVEN if they are clearly looking at you and you'd assume can see you coming (This is something I experience depressingly often, esp. in 20mph zones... Like, they can see how far away I am and that I'm coming... Why don't they just cross then when I'm far away, instead of waiting until I'm within collision distance and THEN crossing?! )

Yes, it's funny how the lemmings cannot see or hear cars and even diesel trucks coming down the road, but miraculously can be aware of illegal electric scooters and deliveroo bikes bearing down on them from behind on the footpath, and leap out of the way like startled pigeons.

I have mentioned my brains and walk off theory on here haven't I?

[Cyker]

1 hour ago, jthspace said:

On my ex-Mitsubishi PHEV you could turn their equivalent of AVAS off which seemed crazy. People had also hacked it to play Star Wars theme.....

You could do that on the earlier hybrids too - It's only more recent ones like mine where AVAS became mandatory that they removed the ability to disable it.

I must admit I'm surprised car manufacturers haven't started selling alternative AVAS noises as a side earner, like companies used to sell ringtones in the old days  

 

[jthspace]

2 minutes ago, Cyker said:

I must admit I'm surprised car manufacturers haven't started selling alternative AVAS noises as a side earner, like companies used to sell ringtones in the old days  

 

OMG - NO! That damned frog . . . . . 

[MikeSh]

1 hour ago, jthspace said:

OMG - NO! That damned frog . . . . . 

I've got 4 versions of that in my phone music folder, and also the video somewhere.

[Cyker]

Why?! Why do you have even 1 version of it!??!?