Last year when everyone was purchasing Goodyear MTRS, there was the big hoo haa about the legalities of this tyre.
Goodyear stated that it needed an 8.5inch width rim to run them, whilst legally we can only go to an 8inch width rim. Well 35's are not legal anyway......
Did anyone end up getting the MTRS passed through an engineer, or did everyone just take the risk and run them anyway.
Tried to search but all info is old now. So who is running engineered tyres 35inch+ on the road MTR or other?
Cheers
Tonka.
Notice: We request that you don't just set up a new account at this time if you are a previous user.
If you used to be one of our moderators, please feel free to reach out to Chris via the facebook Outerlimits4x4 group and he will get you set back up with access should he need you.
If you used to be one of our moderators, please feel free to reach out to Chris via the facebook Outerlimits4x4 group and he will get you set back up with access should he need you.
Recovery:If you cannot access your old email address and don't remember your password, please click here to log a change of email address so you can do a password reset.
Did anyone Engineer 35 inch MTRS?
Moderators: toaddog, TWISTY, V8Patrol, Moderators
Did anyone Engineer 35 inch MTRS?
MY JEEP BUILD
v840 wrote: [Not a shot at Tonka] It's like saying, hell I've got two nuts, I may as well cut one of them off for the hell of it. I ain't using it.[/NAS@T] It's ridiculous!
Did anything specific have to be done for the Q78's to comply? Or just said they were fine for the vehicle?
MY JEEP BUILD
v840 wrote: [Not a shot at Tonka] It's like saying, hell I've got two nuts, I may as well cut one of them off for the hell of it. I ain't using it.[/NAS@T] It's ridiculous!
Nothing was said that I know of. It was done when the lux was in Sydney and I was in Albury. My bead lock rims are not on the report btw only the tyres on 8 inch rims.
What gets me is engineers say I want do 35 as they need a 8.5 rim but they`ll do 33`s
their both the same bloody width tyre 
just the hight changes.
What gets me is engineers say I want do 35 as they need a 8.5 rim but they`ll do 33`s
their both the same bloody width tyre just the hight changes.
I had BFG 35s engineered on 8" rims.
The engineer derated the weight limit and put it on the placard.
He also had a letter fromGoodrich stateing that was all that needed changing.
One of the reasons was also as the major tyre co's sell the tyres on a market where 8" is the max allowed rim.
Still more than enough for any 4x4.
Bazzle
The engineer derated the weight limit and put it on the placard.
He also had a letter fromGoodrich stateing that was all that needed changing.
One of the reasons was also as the major tyre co's sell the tyres on a market where 8" is the max allowed rim.
Still more than enough for any 4x4.
Bazzle
bazzle wrote:I had BFG 35s engineered on 8" rims.
The engineer derated the weight limit and put it on the placard.
He also had a letter fromGoodrich stateing that was all that needed changing.
One of the reasons was also as the major tyre co's sell the tyres on a market where 8" is the max allowed rim.
Still more than enough for any 4x4.
Bazzle
Who engineered it
How much
Mere
HYPOFAB 
ToNkA wrote:Did anything specific have to be done for the Q78's to comply? Or just said they were fine for the vehicle?
If your vehicles tyre placard requires speed rated tyres you cannot be legaly engineered AFAIK with Q78's. Other swampers are different i think.
I can (and will eventually
) get them engineered on my vehicle as it doesnt require speed rated tyres (82 LR) and the larges option of tyres was 900x 16 which is about 35'', so then the + or - 50mm rule can be engineered with 36inches.
Dave.
Land Rover Discovery - GQ conversion underway
Mark Costello wrote:I have 35" radial claws on 15x10 rims engineered.
Its funny how poeple think an engineer is the final word ,
They are not the RTA is the final word and they have a specific guide line to which engineeres are supose to abide by ,
Its quite possibe you have these engineered on your papers ,and added to your rego , the engineer is really only a screening device so the rta dosn,t need to employ a heap of qualified engineers , The ability for him to venture into a GREY area or make a misjudgment is very real ,
The consiquence of this is when the shit hits the fan ,your on your pat malone. all that is recorded is the fact that an engineer signatory has
misquoted the guide lines in his report .
The guidlines state no rim size on 4x4s wider then 8" , unless proof the vehicle was supplied with rims of a larger size , Eg 1978 Blue Goat Game
Limited edition had standard 15x 10 rims , You may not own one But by using the diffs from this vehicle allows you to use the larger rims .
The problem with lawers and courts. The pleading of ignorance is not an exuse
for dissmissal of responsability , you would be better to plead -
dimminished responsability - drug use -alcholism- abused childhood -
If you ever get done for somthing try to fit one of the above to your needs ,
NJ SWB wrote:The limit for changing tyre diameters is not +/-50mm, or +/-15%; it is +/- 15 millimetres. Anything more than this requires engineering (unless you're in Queensland, where you need divine intervention.
Scott
Sorry your right
I was thinking of track increase (+50mm).
Dave.
Land Rover Discovery - GQ conversion underway
It is the brake fade that becomes the issue. I am trying to get my 35's engineered at the moment. My prob was that I hadn't adjusted the speedo after putting them on so my 10 times repeated brake test was done 8% quicker than it should have and my brakes faded too quick. 6th go.
I had already upgrade to discs on my 40, so I am going to let the tires down a bit more (try and reduce the radius) get my speed o adjusted. If that doesn't work I will try better pads, then maybe some ventilated discs.
Its what you have to do I guess and all about how much of the risk you are prepared to take on yourself. I have too much to lose so I will be doing mine squeaky clean.
I had already upgrade to discs on my 40, so I am going to let the tires down a bit more (try and reduce the radius) get my speed o adjusted. If that doesn't work I will try better pads, then maybe some ventilated discs.
Its what you have to do I guess and all about how much of the risk you are prepared to take on yourself. I have too much to lose so I will be doing mine squeaky clean.
Something witty said by someone famous
DaveS3 wrote:NJ SWB wrote:The limit for changing tyre diameters is not +/-50mm, or +/-15%; it is +/- 15 millimetres. Anything more than this requires engineering (unless you're in Queensland, where you need divine intervention.
Scott
Sorry your right
I was thinking of track increase (+50mm).
Dave.
In Qld track increase is max 50mm on solid axles and 25mm with independent AFAIK.
My brother got told by the RTA that his 125mm was too much
Land Rover Discovery series 1 V8
I had the 35s engineered in Vic. The way it was explained to me is that the engineer is able to approve anything that goes beyond the ADRs by either testing, measuring or calculating.
Eg. the only way my brakes passed was by calculating that the tyres increased by 15% therefore the legal GVM had to be reduced by 15% This came down to a stupidly low figure but when you look at the troopy with a higher GVM (3300kg) and the same brakes, we could start there and reduce by 15% to get back to my original GVM of about 2800kg on the middy.
The big issue was the tyre and rim fitment guide IS the be all and end all of what you can do. It states that even a 33in tyre must be on a rim of at least 8.5 in.(regardless of what the manufacturer says, these are the rules for Oz) The problem there is that other legalities make 10in rims illegal so I had to find 8in rims that actually measured 8.5 in to keep the engineer happy.
Tonka - pm me if you want details of the engineer cos I'm not on the forum to often atm.
Eg. the only way my brakes passed was by calculating that the tyres increased by 15% therefore the legal GVM had to be reduced by 15% This came down to a stupidly low figure but when you look at the troopy with a higher GVM (3300kg) and the same brakes, we could start there and reduce by 15% to get back to my original GVM of about 2800kg on the middy.
The big issue was the tyre and rim fitment guide IS the be all and end all of what you can do. It states that even a 33in tyre must be on a rim of at least 8.5 in.(regardless of what the manufacturer says, these are the rules for Oz) The problem there is that other legalities make 10in rims illegal so I had to find 8in rims that actually measured 8.5 in to keep the engineer happy.
Tonka - pm me if you want details of the engineer cos I'm not on the forum to often atm.
73 Series Middy Cruiser 308 VN V8 OME 2in Susp lift 2in Body lift 35in Pro Comp X-Terrains
I have had several inspections on my truck and now on its second engineers certificate it was finaly ticketed last Wed and he said no way if i insist on 35's find some one else he checked every thing from the secondry bonet catch to the lights and the distance in from the edge of the car etc. It actural failed its first break test i would say it is the rolling dia of tyres and what the breaks are rated to from the factory that they are looking at.
Some things i dont have to have by law but was made to do because of safty reasons any way. I was told in Vic it is blanket 35's you carnt get engineered any more not by an engineer but by some one that uses them regulary. I had trouble just getting an engineer to take the job on there was no way i was going to push the point for 35's
Some things i dont have to have by law but was made to do because of safty reasons any way. I was told in Vic it is blanket 35's you carnt get engineered any more not by an engineer but by some one that uses them regulary. I had trouble just getting an engineer to take the job on there was no way i was going to push the point for 35's
If you can not get there in a 4wd its not worth looking at
Had a dude come up to me at Wandin while I was on the club stand asking about this today.. Hes been trying to find some1 to do them for his GU, hes called numerous, and none will do it. He wants a 4in lift at same time... Kev Williams seems to have pulled the pin on 4bs completely.
1 will do a total of 4inch' of lift, eg 2in tires, and 2in suspension, but that was it...
1 will do a total of 4inch' of lift, eg 2in tires, and 2in suspension, but that was it...
Who is online
Users browsing this forum: Google [Bot] and 1 guest