Nct tyre tread depth

vince

What is the depth of tyre tread to pass is it the same as the road legal limit gards check.

Alanstrainor

vince wrote: »

What is the depth of tyre tread to pass is it the same as the road legal limit gards check.

1.6mm, the same as the legal limit. Which is really worn, if any tyre is approaching that level I'd be changing it.

nelly17

I got a car back with a 3mm dept and it was just a warning

biko

https://www.ncts.ie/media/1004/nct-manual-july-2014.pdf
Section 38

Reason for failure
Depth of less than 1 .6mm in the central three-quarters of the tread pattern.

The owner should be advised of any tyre with a tread depth of less than 3mm or, where the date of manufacture is obvious on the tyre , a tyre older than six years.

CiniO

Alanstrainor wrote: »

1.6mm, the same as the legal limit. Which is really worn, if any tyre is approaching that level I'd be changing it.

NCT manual says to check for 1.6mm over central 3/4 of tread pattern.

But legal limit afair is 1.6mm over whole tread pattern.

I might be wrong though.

coylemj

CiniO wrote: »

NCT manual says to check for 1.6mm over central 3/4 of tread pattern.

But legal limit afair is 1.6mm over whole tread pattern.

I might be wrong though.

You're correct Cinio.

I picked up a booklet called 'Your guide to tyre safety' in my NCT centre last week and it mentions the Road Traffic (Construction and Use of Vehicles) Regulations 2003 as containing the legal requirements. I looked up that SI (statutory instrument) and it says as follows...

55. (1) Subject to this Regulation, a vehicle shall not be used on a road if any wheel is fitted with a pneumatic tyre and -

(f) in the case of vehicles other than, pedestrian controlled vehicles mechanically propelled cycles, and vehicles first registered before 31 December 1930, the main grooves of the tread pattern of the tyre do not have a depth of at least 1.6 millimetres throughout a continuous band around the entire outer circumference of the tyre

http://www.irishstatutebook.ie/eli/2003/si/5/made/en/print

......... and there needs to be a visible thread on the remaining 25% if it's less than the 1.6mm in the centre 75% iirc.

coylemj

Augeo wrote: »

......... and there needs to be a visible thread on the remaining 25% if it's less than the 1.6mm in the centre 75% iirc.

you clicked the 'thanks' button on my post which (dare I say?) suggests that you read it - then you posted that?

If any part of the tread is less than 1.6mm then you are illegal. The 1.6mm minimum applies across the entire width of the tyre. The regulations do not mention a centre 75% of the tread.

Toyotafanboi

coylemj wrote: »

If any part of the tread is less than 1.6mm then you are illegal. The 1.6mm minimum applies across the entire width of the tyre. The regulations do not mention a centre 75% of the tread.

It actually does reffer to just the centre 75%.

meathstevie

coylemj wrote: »

you clicked the 'thanks' button on my post which (dare I say?) suggests that you read it - then you posted that?

If any part of the tread is less than 1.6mm then you are illegal. The 1.6mm minimum applies across the entire width of the tyre. The regulations do not mention a centre 75% of the tread.

Not quite, construction and use legislation refers to the main grooves and that's what the NCT is bound by. To find out what the main grooves on your particular tyre are; they're the ones with the wear indicators. Obviously stuff like bulges and cuts in tyrewalls and all are a different story.

GM228

coylemj wrote: »

you clicked the 'thanks' button on my post which (dare I say?) suggests that you read it - then you posted that?

If any part of the tread is less than 1.6mm then you are illegal. The 1.6mm minimum applies across the entire width of the tyre. The regulations do not mention a centre 75% of the tread.

The 1.6mm applies to the central three-quarters of the width of the tread surface, not the entire width of the tyre. There is no minimum depth for the remaining quarter spread on each side (an eight) of the tread surface.

punisher5112

Hi I'll show an example of what my tyre was like which only for the big tear and cord exposer was actually still legal in the centre ⅔.

The tread wear on inside and outside from cornering and tracking been off was a big wear on them and also it been a diesel heavy engine on the front.

I've posted pic on motors thread but it will show how important it is to check tyre regularly as this happened in under a week.

CiniO

GM228 wrote: »

The 1.6mm applies to the central three-quarters of the width of the tread surface, not the entire width of the tyre. There is no minimum depth for the remaining quarter spread on each side (an eight) of the tread surface.

What about legislation that coylemj quoted earlier in this thread?
It seems to suggest that 1.6mm limit applies to whole tread, not only centre 3/4

punisher5112

punisher5112 wrote: »

Hi I'll show an example of what my tyre was like which only for the big tear and cord exposer was actually still legal in the centre ⅔.

The tread wear on inside and outside from cornering and tracking been off was a big wear on them and also it been a diesel heavy engine on the front.

I've posted pic on motors thread but it will show how important it is to check tyre regularly as this happened in under a week.

Happened in under a week?
what mileage did you do in that week?
Can't fathom how that would happen in a week tbh.

jca

Augeo wrote: »

Happened in under a week?
what mileage did you do in that week?
Can't fathom how that would happen in a week tbh.

I can't either unless he clobbered a footpath and kept driving.

coylemj

coylemj wrote: »

you clicked the 'thanks' button on my post which (dare I say?) suggests that you read it - then you posted that?

If any part of the tread is less than 1.6mm then you are illegal. The 1.6mm minimum applies across the entire width of the tyre. The regulations do not mention a centre 75% of the tread.

I thanked your post as it was not at all incorrect, it was however not totally complete......... so I provided the extra info that you were not aware of

HTH

I won't thank your latest post as you are not correct And with tone like yours you should really have your facts straight before going off on one.

GM228

CiniO wrote: »

What about legislation that coylemj quoted earlier in this thread?
It seems to suggest that 1.6mm limit applies to whole tread, not only centre 3/4

CiniO, you should know by now I know the law when it comes to these matters

Road Traffic (Construction and Use of Vehicles) Regulations 2003 wrote:

55 (1)

Subject to this Regulation, a vehicle shall not be used on a road if any wheel is fitted with a pneumatic tyre and -

(f) in the case of vehicles other than, pedestrian controlled vehicles mechanically propelled cycles, and vehicles first registered before 31 December 1930, the main grooves of the tread pattern of the tyre do not have a depth of at least 1.6 millimetres throughout a continuous band around the entire outer circumference of the tyre

R55 (1)(f) applies to the "main grooves", it helps to know what the main grooves are:-

Road Traffic (Construction and Use of Vehicles) Regulations 2003 wrote:

46 (1)
“main grooves” means the broad grooves in the central three-quarters of the width of the tread surface

coylemj

GM228 wrote: »

CiniO, you should know by now I know the law when it comes to these matters :

R55 (1)(f) applies to the "main grooves", it helps to know what the main grooves are:-

I stand corrected, thanks for the clarification.

Cinio, we lost this one ...

coylemj

coylemj wrote: »

I stand corrected............

Fair play, I'll thank that one, maybe.

punisher5112

Augeo wrote: »

Happened in under a week?
what mileage did you do in that week?
Can't fathom how that would happen in a week tbh.

OK no worries don't believe me, car wasn't bounced off a kerb but pot holes a plenty.

The tyre split and was ready to explode.

I done a considerable amount of travel in past week.

Toyotafanboi

The desalination may have happened in the last week but you can be sure the tyre was bald on that shoulder and well past it's best over a week ago.

punisher5112

Toyotafanboi wrote: »

The desalination may have happened in the last week but you can be sure the tyre was bald on that shoulder and well past it's best over a week ago.

Yes the inner and outer were worn but tread dept was fully legal across ⅔.

Just my point to always check which I do as if it were her driving it it would never have been noticed till it exploded.

jimbis

I took these two tyres off a car last week, 1 week after they had passed the Nct..... Center 3/4 may be just about legal but check out the side walls and shoulder wear.

punisher5112

jimbis wrote: »

I took these two tyres off a car last week, 1 week after they had passed the Nct..... Center 3/4 may be just about legal but check out the side walls and shoulder wear.

Them some bad cracks on one on right