Retreaded tyres, safe or unsafe

mcwhirter · 23-01-2012 5:47pm #1

Apparently 90% of aircraft tyres are retreads and nearly half of truck/vans use retreads, but what is the general feeling for cars using retreads.

http://www.tyresdirectuk.co.uk/faqs.htm

MugMugs · 23-01-2012 5:49pm

It's illegal isn't it ?

Tea 1000 · 23-01-2012 6:09pm

Unsafe, due to the compound of the rubber used and the changes in it as you get close to the wire.
Aircraft tyres aren't like car ones!

mcwhirter · 23-01-2012 6:12pm

Tea 1000 wrote: »

Unsafe, due to the compound of the rubber used and the changes in it as you get close to the wire.
Aircraft tyres aren't like car ones!

How different are van tyres?

Guy:Incognito · 23-01-2012 6:13pm

mcwhirter wrote: »

How different are van tyres?

Vans dont use remoulds either. Trucks do. Trucks have a lot more tyres to compensate for an issue with one aswell.

In a car you've a point of contact at each corner so if one comes apart your in trouble.

mcwhirter · 23-01-2012 6:25pm

Guy:Incognito wrote: »

Vans dont use remoulds either. Trucks do. Trucks have a lot more tyres to compensate for an issue with one aswell.

In a car you've a point of contact at each corner so if one comes apart your in trouble.

So why are they legally sold in garages and passing EU regulations?

Guy:Incognito · 23-01-2012 6:27pm

mcwhirter wrote: »

So why are they legally sold in garages and passing EU regulations?

What are? Remould car tyres or truck tyres?

Gumbo · 23-01-2012 6:28pm

Is the OP getting mixed up with "part-worn" and "re-threaded" tyres?

MugMugs · 23-01-2012 6:29pm

mcwhirter wrote: »

So why are they legally sold in garages and passing EU regulations?

Are they? How do you know that? You know that write up is geared toward the US?

mcwhirter · 23-01-2012 6:30pm

kceire wrote: »

Is the OP getting mixed up with "part-worn" and "re-threaded" tyres?

Re-treaded, not part worn.

Guy:Incognito · 23-01-2012 6:32pm

mcwhirter wrote: »

Re-treaded, not part worn.

You need to flesh out your posts more. I still dont know if your saying remould car tyres are on sale in garages or not or if your talkign about trucks.

mcwhirter · 23-01-2012 6:34pm

Guy:Incognito wrote: »

You need to flesh out your posts more. I still dont know if your saying remould car tyres are on sale in garages or not or if your talkign about trucks.

I saw car tyres for sale in garage, they have on the sidewall 'retread' and stamped with eu regulations emblems.

Are they same as remoulds?

analfabets · 23-01-2012 6:35pm

From NCT manual:
TYRE CONDITION
Method of Testing
1. Check whether the tyre tread appears to have been recut.
2. Check visually that the tyre is correctly seated on the wheel rim.
3. Examine the tyre for:
(a) any cut or break in the fabric.
(b) any lump or bulge.
(c) any exposure of the ply or cord structure.
4. Examine the valve stem for distortion or chafing.

From that I take that re-treaded tyre would not pass.

colm_mcm · 23-01-2012 6:37pm

Rethreads are legal as long as they comply with UNECE reg 108

Guy:Incognito · 23-01-2012 6:39pm

mcwhirter wrote: »

I saw car tyres for sale in garage, they have on the sidewall 'retread' and stamped with eu regulations emblems.

Are they same as remoulds?

I've never seen remoulds for sale in garages here (in recent memory) . I dotn know if they are actually illegal or not. I wouldnt be useing them anyway especially from seeign the amount of shredded truck tyres on motorways, moreso in Germany than here.

When I'm getting part worn 16" michelins for €35 a corner fitted I cant see any economy in remoulds.

colm_mcm · 23-01-2012 6:40pm

Last time I bought remoulds was 10 years ago, in retrospect try were woeful. Similar to a triangle or Chinese tyre, wore very quickly too.

Part worn a much better bet if you're on a budget

mcwhirter · 23-01-2012 6:41pm

They were for sale in a place in tallaght, well known garage, 2 branches in dublin, 1 in kill.
Why would they sell illegal tyres?

kirving · 23-01-2012 6:45pm

Aircraft, and truck tyres have far more depth than your normal car tyre, so there is much more scope for the tryre to be rethreaded. They're also designed from the start to be rethreaded so it's not a problem. The tyres must be up to the same standard as new ones too.

mcwhirter · 23-01-2012 6:49pm

Just checked NCT manual and it states,the tyre has to be designed for recutting/regrooving and have the E or e mark, which they did.

So they must be legal and NCT worthy.

Are part worn tyres that safe in reality as you don't know history of the tyre. Re-treads have passed eu regulations.

kirving · 23-01-2012 6:50pm

Although not necessarily trustworthy...

Depending on who reconditioned them of course.

sh1tstirrer · 23-01-2012 6:52pm

I got tyres before Christmas and nct. I was offered remolds for 10e a tyre less.

colm_mcm · 23-01-2012 6:53pm

sh1tstirrer wrote: »

I got tyres before Christmas and nct. I was offered remolds for 10e a tyre less.

They'd want to be less than that.

gbee · 23-01-2012 7:00pm

mcwhirter wrote: »

Are they same as remoulds?

Remoulds have the whole surface removed by skimmers and has a sidewall and tread ply added. It is then baked in an over [mould with the tread pattern attached] at temperatures and pressures that equates to a life of a tyre to achieve vulcanisation.

Retreads have the surface tread area removed and have an already vulgarised tread pattern glued on and pressed down, its baking and pressure is much less and thus much less wear is experienced by the original tyre.

sh1tstirrer · 23-01-2012 7:03pm

colm_mcm wrote: »

They'd want to be less than that.

45e a tyre. Who would pay that for them when you can get new tyres for 55e same size.

mcwhirter · 23-01-2012 7:04pm

gbee wrote: »

Remoulds have the whole surface removed by skimmers and has a sidewall and tread ply added. It is then baked in an over [mould with the thread pattern attached] at temperatures and pressures that equates to a life of a tyre to achieve vulcanisation.

Retreads have the surface tread area removed and have an already vulgarised tread pattern glued on and pressed down, its baking is and pressure is much less and thus much less wear is experienced by the original tyre.

So which one is better, if any?

gbee · 23-01-2012 7:18pm

Remoulds always had speed restrictions, they were never a high performance tyre and culpability could be shared with the vehicle owners who crashed at high speeds ~ it would be in the inspector's report.

Remoulds are not necessarily illegal, their usage is, they can no longer be fitted to road going cars ~ can be off road.

Trucks don't use remoulds, the retreads long since being the only alternative to a new tyre.

Remoulds got comparatively expensive against new tyres anyway so there was no real cost benefit to fitting them.

I would not be up to speed on regulations, remoulds would not be illegal per sae, but they would be illegal on the family car, on the road.

mcwhirter · 23-01-2012 7:22pm

gbee wrote: »

Remoulds always had speed restrictions, they were never a high performance tyre and culpability could be shared with the vehicle owners who crashed at high speeds ~ it would be in the inspector's report.

Remoulds are not necessarily illegal, their usage is, they can no longer be fitted to road going cars ~ can be off road.

Trucks don't use remoulds, the retreads long since being the only alternative to a new tyre.

Remoulds got comparatively expensive against new tyres anyway so there was no real cost benefit to fitting them.

I would not be up to speed on regulations, remoulds would not be illegal per sae, but they would be illegal on the family car, on the road.

Thanks, the tyres I seen for sale were retreads as stated on sidewall so should be fine then.

gbee · 23-01-2012 7:24pm

mcwhirter wrote: »

So which one is better, if any?

The retread is far better.

A retread can and have given new tyre mileage and better, remoulds never came close.

mcwhirter · 23-01-2012 7:29pm

gbee wrote: »

The retread is far better.

A retread can and have given new tyre mileage and better, remoulds never came close.

I note they are cheaper than the chinese tyres readily available.

I have have bad experiences with 'wanli' tyres and not knowing history of part worn tyres a bit wary of them.

Are retreads any worse than these?

gbee · 23-01-2012 7:48pm

mcwhirter wrote: »

Are retreads any worse than these?

It's all down to the casing, that's the body of the tyre. As far as it goes, part worn and retread tyres could have similar casing problems, these could go undetected.

I would not know about the inspection of the part worn tyre. The retread would be extensively examined prior to process.

The ethos of the part worn tyre is the customer replaces his/her tyres at five mm or at a fixed mileage regardless of the condition of the tyre. In good faith these would be excepted to be fine.

Assume the casing is equal in each case, then the retread wins the day because you'd expect a good mileage figure from the retread and have full thread depth, a good thing in many situations.

sundodger5 · 23-01-2012 8:16pm

Guy:Incognito wrote: »

I wouldnt be useing them anyway especially from seeign the amount of shredded truck tyres on motorways, moreso in Germany than here.

Just on a technical note the shredded truck tyres you see are probably not remoulds. What happens is that a truck with twin wheels on an axle gets a puncture on one of the wheels. This leaves the one tyre trying to carry the whole weight. Needless to say it is overloaded, overheats and disintegrates.

Retreaded tyres, safe or unsafe

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