Regrooving tyres - Simex ET's

Post by **RockyF75** » Wed Oct 04, 2006 6:55 pm

Anyone done it? I asked my local tyre mob and they didn't want any part of it. I don't want to do it myself as dont have tools, nor do i trust myself to do it 'right'. Would like to get a few extra mm of life outta them. They are being used prolly 95% offroad, trailered to distant tracks, only driven to local ones.
Do ET's have enough meat in the carcass to do it safely?? And does anyone know a place in Sydney that will do it?

Post by **embryo** » Wed Oct 04, 2006 8:02 pm

get a new set tight bum! regrooving went out years ago hence why your local tyre mob wanted no part in it.

Post by **chops** » Wed Oct 04, 2006 8:12 pm

unless the tyre says its regrooveable, i wouldn't advise doing it

Post by **HotFourOk** » Wed Oct 04, 2006 10:02 pm

You got them so cheap... and you're trying to do more on the cheap...

tsk tsk

Unsafe Nathan... unsafe

They are not much to buy new man... dont be a fish

Post by **RockyF75** » Wed Oct 04, 2006 10:22 pm

Yes, I am cheap

. And i wouldn't call $280 a piece for new ones NOT MUCH

. If its THAT bad to do then i guess i'll start saving now and hope these last a year or so. Didn't think it'd be a huge issue for a pretty much dedicated offroad tyre

Post by **sudso** » Thu Oct 05, 2006 12:56 am

They aren't re-groovable.

I know a farmer though who "regrooves his tyres on his 20T tip truck"
When they get to the wear limit he cuts what grooves are left with an angle grinder so they look legal and to get a bit more mileage!

He puts the rear up on stands, lets it idle in 1st gear and sits there grinding away

Now thats cheap

Post by **marin** » Thu Oct 05, 2006 6:37 am

sudso wrote:They aren't re-groovable.

I know a farmer though who "regrooves his tyres on his 20T tip truck"
When they get to the wear limit he cuts what grooves are left with an angle grinder so they look legal and to get a bit more mileage!
He puts the rear up on stands, lets it idle in 1st gear and sits there grinding away
Now thats cheap

most truck tyres are regroovable, next time you pull up next to a big truck at the lights, have a read of his tyres.

ive heard that JT2's have enough meat in them to regroove..... but not sure if its worth the effort... possibly you could get a bit more life outa the centre lugs if the side lugs are still big, but as others have said, it can get dodgy as you dont know how much to cut away without hitting the carcass.

marin

Post by **waxhead..** » Thu Oct 05, 2006 6:41 am

I have personally seen a tyre store worker regroove and bring back to life a set of JT2's. The outer lugs were still huge and he re-stored the centre lugs back to factory. These tyres are still going strong on a GQ tray back.

Post by **WICKED** » Thu Oct 05, 2006 8:16 am

get a tyre iron and do it.

mate did his 35inch ets bout 3 times from memory

Post by **sudso** » Thu Oct 05, 2006 1:47 pm

Yeah ok simexes are thick enough to regroove. I just thought it was illegal to regroove some tyres.
The rubber thickness of the tyre is about 10-12mm I think. Does the mean it's ok or legal to do? As they are probably illegal (bias ply) on most rigs for the road to start with it's probably ok to regroove for off road use only.

I've got some JT 1's which are nearly half worn on the centre lugs but how much would it weaken the overall strength of the tyre if I had them regrooved?

Post by **HotFourOk** » Thu Oct 05, 2006 2:52 pm

sudso wrote:Yeah ok simexes are thick enough to regroove. I just thought it was illegal to regroove some tyres.
The rubber thickness of the tyre is about 10-12mm I think. Does the mean it's ok or legal to do? As they are probably illegal (bias ply) on most rigs for the road to start with it's probably ok to regroove for off road use only.

I've got some JT 1's which are nearly half worn on the centre lugs but how much would it weaken the overall strength of the tyre if I had them regrooved?

Are Simex ET bias ply??

A tyre is only regroovable if it says so on the sidewall.. I don't think any passenger car type tyres have been. Mostly on trucks.

Post by **Nev** » Thu Oct 05, 2006 3:34 pm

HotFourOk wrote:
Are Simex ET bias ply??

Certainly are..

Post by **WICKED** » Thu Oct 05, 2006 4:17 pm

sudso wrote: I just thought it was illegal to regroove some tyres.

they are illegal to start with. Bias ply's are not road legal as far as i know

Post by **HotFourOk** » Thu Oct 05, 2006 4:35 pm

Ahhh ok then, yeh as above, I don't think bias ply are legal anyway.. lol

Just found this on the simex site:

"31/10.5-15 Extreme Trekker 6PR 110N TL"

Does 6PR mean 6 ply radial construction?

I'm wanting to find out, because my friend recently bought a set as daily drivers

Post by **Madmac** » Thu Oct 05, 2006 5:52 pm

where can one purchase a tyre grooving iron?

Post by **RockyF75** » Thu Oct 05, 2006 8:43 pm

Nev wrote:
HotFourOk wrote:
Are Simex ET bias ply??

Certainly are..

Sidewall on mine say 6ply rating

Enlighten me

Post by **Shadow** » Thu Oct 05, 2006 10:18 pm

a bias ply tyre can have 20 PLY, but its still bias ply construction.

Post by **chops** » Thu Oct 05, 2006 10:28 pm

HotFourOk wrote:Ahhh ok then, yeh as above, I don't think bias ply are legal anyway.. lol

Just found this on the simex site:

"31/10.5-15 Extreme Trekker 6PR 110N TL"

Does 6PR mean 6 ply radial construction?

I'm wanting to find out, because my friend recently bought a set as daily drivers

6PR = 6 ply rating

if it was radial, it'd be a R15

Post by **bazzle** » Fri Oct 06, 2006 10:00 am

RockyF70 wrote:
Nev wrote:
HotFourOk wrote:
Are Simex ET bias ply??

Certainly are..
Sidewall on mine say 6ply rating

Enlighten me

Its the load rating not necessarily the construction quantity.

Bazzle

Post by **dogbreath_48** » Fri Oct 06, 2006 10:32 pm

Anyone around melbourne who might want to do my spare JT?

Post by **RockyF75** » Fri Oct 06, 2006 11:24 pm

chops wrote:
if it was radial, it'd be a R15

I thought R15 was the rim size?? 15"

Post by **dogbreath_48** » Fri Oct 06, 2006 11:26 pm

RockyF70 wrote:
chops wrote:
if it was radial, it'd be a R15
I thought R15 was the rim size?? 15"

the "R" is for radial, the rim size has nothing to do with the R

Post by **Shadow** » Sat Oct 07, 2006 1:23 pm

RockyF70 wrote:
chops wrote:
if it was radial, it'd be a R15
I thought R15 was the rim size?? 15"

A tyre doesnt usually specify anything about the rim. Some may specify the rim profile but generally it is up to a tyre fitter to ensure an R15 tyre is fitted to a 15" rim.

Post by **AutoBalanceMan** » Thu Oct 12, 2006 6:37 am

Madmac wrote:where can one purchase a tyre grooving iron?

We can send a tyre groover to your door for $550. You would want to be re-grooving a fair few tyres to make it a cost affective purchase.

Post by **Madmac** » Fri Oct 13, 2006 2:47 pm

i just did the centre lugs on my ETs, i used a router. heres a link with some pics
http://downunder4x4.net/forum/showthread.php?t=3277

Post by **Madmac** » Fri Oct 13, 2006 5:09 pm

AutoBalanceMan wrote:
Madmac wrote:where can one purchase a tyre grooving iron?
We can send a tyre groover to your door for $550. You would want to be re-grooving a fair few tyres to make it a cost affective purchase.

thanks for the offer/info. as youstated though its not real cost effective for 1 set of tyres. i made do with the router.

Post by **std80** » Fri Oct 13, 2006 8:53 pm

i thought if they had a speed and load rating then they were legal,
and the last number of the size is generally the rim diameter, if it has R before it (for example R16) then it is a radial if it has -16 then its a bias tyre..

Post by **JemmyBubbles** » Fri Oct 13, 2006 10:55 pm

Meh. I would never use ET's on road... ever. Legal or not they just dont seem quite right for road use, not to mention the noise.

If ya aint driving em on the road, I say go for it.

There have been a few DIY guides floating around the internet on yankee 4x4 sites in the past. Read up and yank em off.. get a pen knife or a dremel or something pair of scissors ? and carve away.

Post by **sniper** » Sat Oct 14, 2006 2:43 pm

In NSW you are only allowed to run bias tyre if your car/truck left the factory with it. Otherwise it is a radial tyre only for you (by law).

It is only legal to regroove your tyre if it is stated by the manufacture. It would say so on the side wall.

Now the ply I was under the impression is how the carcus is constructed be it radial or bias by the amount of times the carcus is ran over the top of each other, providing strength. Not the amount of rubber that is on the tyre.

Again if you are insured to run a bias tyre (non regroovable) and you regoove it and you have an acca, you wont be covered.

Personally I would not regoove a tyre as you are giving it less strength/protection from the sticks and rocks.

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Regrooving tyres - Simex ET's

Regrooving tyres - Simex ET's

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