Nct tyre question

blahblah06

Hi do the tyres on each axel have to be the same each side or once there's thread there ok?

George Dalton

They have to be the same size on each axle. Brand doesn't matter as long as they are the same size.

blahblah06

That's great news thanks

bornok

how about the load and speed rating? they must be the same too?

cannot pass the one with 215width at the back and 205 on the front?

thanks

76mini

^^^ Of course you can pass with wider tyres on the back. Many rear wheel drive cars came like that from the factory.

Nissan doctor

There is talk of load and speed ratings having to be matched in the future though...

CiniO

Nissan doctor wrote: »

There is talk of load and speed ratings having to be matched in the future though...

Additionally from what I know in most EU countries, tyres must have the same shape of tread within the axle. So it generally means they have to be the same make and model, as it happens very seldom to have two different tyres with the same tread shape.

AFAIK Ireland and UK are the only countries where this is not required.

Are they thinking about putting such requirement here as well?

Nissan doctor

CiniO wrote: »

Additionally from what I know in most EU countries, tyres must have the same shape of tread within the axle. So it generally means they have to be the same make and model, as it happens very seldom to have two different tyres with the same tread shape.

AFAIK Ireland and UK are the only countries where this is not required.

Are they thinking about putting such requirement here as well?

I believe there was something being mentioned about same axle tyres must be standard/directional/asymetric.

Its all being introduced in stages though, 'e' marks where the first stage, tyres manufacturer dates where the second and I believe the load/speed ratings are next on the list..


Its only right anyway as no two tyres of different brand/thread design will handle the same, so why would you want odd handling on your car. The same is true of the speed/load ratings. Even in two identical brand and model of tyre, a H rated one has a different rubber compound to a V rated one so will handle and react differently.

CiniO

Nissan doctor wrote: »

I believe there was something being mentioned about same axle tyres must be standard/directional/asymetric.

Its all being introduced in stages though, 'e' marks where the first stage, tyres manufacturer dates where the second and I believe the load/speed ratings are next on the list..


Its only right anyway as no two tyres of different brand/thread design will handle the same, so why would you want odd handling on your car. The same is true of the speed/load ratings. Even in two identical brand and model of tyre, a H rated one has a different rubber compound to a V rated one so will handle and react differently.

Absolutely true.

As well other thing I heard is that minimum speed rating required in Ireland is the one above maximum permitted speed limit(which in Ireland is 120km/h on motorway).
Does that mean it's actually legal to fit Q tyres (up to 160km/h) on a car which is able to do 200km/h?

If so I think it's mad, and again it's different than almost anywhere in the EU.]

Nissan doctor

CiniO wrote: »

Absolutely true.

As well other thing I heard is that minimum speed rating required in Ireland is the one above maximum permitted speed limit(which in Ireland is 120km/h on motorway).
Does that mean it's actually legal to fit Q tyres (up to 160km/h) on a car which is able to do 200km/h?

If so I think it's mad, and again it's different than almost anywhere in the EU.]

You have to remember that most Irish peoples attitide towards tyres is that once they can meet whatever the NCT's absolute minimum standard is then they are a good tyre, road safety, handling, traction etc are all just things that the garage talks about to try to get you to spend 'mad money' on a tyre.:rolleyes::rolleyes:

Chimaera

CiniO wrote: »

Absolutely true.

As well other thing I heard is that minimum speed rating required in Ireland is the one above maximum permitted speed limit(which in Ireland is 120km/h on motorway).
Does that mean it's actually legal to fit Q tyres (up to 160km/h) on a car which is able to do 200km/h?

If so I think it's mad, and again it's different than almost anywhere in the EU.]

My understanding of the regulations is that the tyres fitted must at least meet the homologation standard for the vehicle. I.e. if it had H rated tyres from the factory, then at least H rated tyres must be fitted.

Also, speed ratings are devised based on the maximum speed the tyre will run for 10 minutes at without breaking up: I always go at least one rating above the vehicle's max speed for a margin of safety.

L-M

Nissan doctor wrote: »

You have to remember that most Irish peoples attitide towards tyres is that once they can meet whatever the NCT's absolute minimum standard is then they are a good tyre, road safety, handling, traction etc are all just things that the garage talks about to try to get you to spend 'mad money' on a tyre.:rolleyes::rolleyes:

I know of a few people that make a very healthy living out of selling new tyres, so that argument of us Irish completely avoidin buying tyres is kind of boring.

Limerick man

Limerick man wrote: »

I know of a few people that make a very healthy living out of selling new tyres, so that argument of us Irish completely avoidin buying tyres is kind of boring.

I know two lads who have tyre shops, one also has a motor factors and he reckons the recession has hit the tyres a bit as they were always seen as a grudge purchase anyway.

Folks can make very decent livings from selling Triangle tyres etc

L-M

RoverJames wrote: »

I know two lads who have tyre shops, one also has a motor factors and he reckons the recession has hit the tyres a bit as they were always seen as a grudge purchase anyway.

Folks can make very decent livings from selling Triangle tyres etc

I was more refering to the "Nct passable limit"

I know
Hence why cheap tyres are sold in such numbers, I have a set of them myself :pac: In fainress regardless of the NCT I'd always have tyres with thread that I am happy with, pre NCT days I never drove on baldies

ND was suggesting folks buy cheap ones in the main I think.

CiniO

Chimaera wrote: »

My understanding of the regulations is that the tyres fitted must at least meet the homologation standard for the vehicle. I.e. if it had H rated tyres from the factory, then at least H rated tyres must be fitted.

I never found any requirement like that in Irish law.
As well it's not checked on NCT.

Also, speed ratings are devised based on the maximum speed the tyre will run for 10 minutes at without breaking up: I always go at least one rating above the vehicle's max speed for a margin of safety.

I'd say margin of safety is way bigger anyway.
I managed to drive at about 200 - 205km/h permanently for about an hour on T rated tyres (up to 190km/h). Nothing happened and tyres were all OK.

L-M

I've never bought "good" tyres. I've driven cars with good tyres, and the only difference is when you push a car on hard, that's when they benefit.

A friends E46 with Good year eagle F1's was absolutely horrible to drive. The road noise was very bad, and the car pulled itself with every bump and hump in the road.

CiniO

Nissan doctor wrote: »

You have to remember that most Irish peoples attitide towards tyres is that once they can meet whatever the NCT's absolute minimum standard is then they are a good tyre, road safety, handling, traction etc are all just things that the garage talks about to try to get you to spend 'mad money' on a tyre.:rolleyes::rolleyes:

I've seen an Irish attitude to tyres when I first moved here.
Even though I'm originally from Poland, which economy isn't as great as in Ireland and people are much poorer, I've never seen so many people driving on those cheap Chinese tyres there.
As well it was the first time here I saw garages balancing only front tyres as there was no need to balance rear ones.
The best thing though, was when I got a flat tyre and the garage man said he couldn't fix the tyre, but he can sell me a new one. My car has 155/65R13 tyres, but he offered me 155/70R13 and said it was only one size bigger so it wouldn't make any difference. I wouldn't even feel it was different. Probably if looks could kill, he'd dead

CiniO

Limerick man wrote: »

I've never bought "good" tyres. I've driven cars with good tyres, and the only difference is when you push a car on hard, that's when they benefit.

You forgot to mention they differ as well when you want to do something in emergency (like emergency braking or avoiding an obstruction). That's the moment when you really need good tyres. And such moment might happen to anyone anytime unexpectedly and might be a difference between life and death.

A friends E46 with Good year eagle F1's was absolutely horrible to drive. The road noise was very bad, and the car pulled itself with every bump and hump in the road.

Maybe tyres were too wide.

L-M

CiniO wrote: »

You forgot to mention they differ as well when you want to do something in emergency (like emergency braking or avoiding an obstruction). That's the moment when you really need good tyres. And such moment might happen to anyone anytime unexpectedly and might be a difference between life and death.

The driver has a lot to do with it over the tyre, but the tyre would play a big part. I have Federals on mine, they were 220 from the front two. I wasn't going to pay anymore to be honest.

Maybe tyres were too wide.

And no, they were to manufacturers standards.

fabsoul

ok i never got cheap tyres before always got good brand tyre,
but just got 255/35/18 fullrun but only about 1k on them find ok so far around and that in the wet on bad road.

maxfresh

Mine failed on the tyre being the wrong direction ,as in theres an arrow that shows the correct rotation of the tyre

fabsoul

maxfresh wrote: »

Mine failed on the tyre being the wrong direction ,as in theres an arrow that shows the correct rotation of the tyre

well who put them on??

maxfresh

fabsoul wrote: »

well who put them on??

think was my fault as put on spare after puncture

CiniO

maxfresh wrote: »

think was my fault as put on spare after puncture

That's why you should never have directional tyre as a spare

Voodoomelon

Limerick man wrote: »

A friends E46 with Good year eagle F1's was absolutely horrible to drive. The road noise was very bad, and the car pulled itself with every bump and hump in the road.

What profile were his F1s? I love mine and i'll be getting them again. Very quiet, grippy tyre, with virtually the same satisfaction ratings as the Michelin PS2s on TyreReviews at about 20% less in price.

Nissan doctor

Limerick man wrote: »

I've never bought "good" tyres. I've driven cars with good tyres, and the only difference is when you push a car on hard, that's when they benefit.

A friends E46 with Good year eagle F1's was absolutely horrible to drive. The road noise was very bad, and the car pulled itself with every bump and hump in the road.

On an E46, much more likely to have been an alignment/worn wishbone bush isse then a tyre issue TBH.

Mar4ix

Never seen reconditioned tyres in Ireland, does anybody do this ? Or it is illegal here ?
In Latvia, there is certain companies who offer that kind tyres, even with warranty till 4 mm or so.
ok, might risky a bit on high speed, but driving in city, and up to 60 mph it shall be fine.
Before i came to Ireland, i was using such tyres, if regular tyre in average cost around 50 euro, then recondition one cost 20-25 euro. and car passed all tests (nct) , and never had any trouble with them.

L-M

Voodoomelon wrote: »

What profile were his F1s? I love mine and i'll be getting them again. Very quiet, grippy tyre, with virtually the same satisfaction ratings as the Michelin PS2s on TyreReviews at about 20% less in price.

I'm not sure, I'll have to ask him as he sold the car last week.

Nissan doctor wrote: »

On an E46, much more likely to have been an alignment/worn wishbone bush isse then a tyre issue TBH.

That wouldn't be it, he is the most particular man in the world, and the car had just been NCT'd. It was definitely the tyres, I've driven many, many cars and I know what a worn car feels like.

TAPlank

Some time ago a lady driver complained that her small car handled very poorly, she had just bought it secondhand and was now very unhappy.
A test run showed that it handled very poorly indeed, a quick check did not show up any mechanical faults. It was then noticed that while the front and rear tyres on one side were the same those on the other side were of a different make. Swapping them around so that each axle had the same make and type cured the handling problem. All of the tyres were only very slightly worn.

Nissan doctor

TAPlank wrote: »

Some time ago a lady driver complained that her small car handled very poorly, she had just bought it secondhand and was now very unhappy.
A test run showed that it handled very poorly indeed, a quick check did not show up any mechanical faults. It was then noticed that while the front and rear tyres on one side were the same those on the other side were of a different make. Swapping them around so that each axle had the same make and type cured the handling problem. All of the tyres were only very slightly worn.

Odd tyres on the same axle will always cause unusual handling...