NSW New lift Limit

[matp]

Hello guys,

First time owner of a Wrangler and very excited.. Would love your help and opinion.. I recently read that apparently since NOV 2016 new legal lift limit of 75mm was introduced .. Any one know if this is true and effective today ? Also wondering for a jeep JK Wrangler sports unlimited 2011 what is the max tyre size in inches and lift that i could run and be legal ? would i be able to do 2" lift and run 33" tyres for example??

[ren0vator]

I read somewhere online;
2" suspension
2" tyre (which is 1" cause tyres are circles)
Adds up to 3"

Legislation was in discussion stage in Vic & NSW
Sorry can't remember where that was

[Classic Boy]

In Vic it is on the inter web on vic roads website section dealing with VSB's for mods. One would assume NSW has similar sections their website.

[matp]

So after reading VSB's on gov webpage I have come to the conclusion (if i understand it correctly) that if using a lift + larger wheels a combined extra max height of 75mm is allowed but lift alone is maxed at 50mm. So imagining I have a 2" lift kit (50mm) how big of a wheel in inches can I legally fit to account for remaining 25mm ?

Also wondering if you where to get certified for larger lift and wheels does anyone know how much an engineer generally charges for this and where to get it done?

Below is what i read from gov webpage regarding lifts if it helps anyone:

3.2 Modifications that require assessing and certification
The significant modifications below require a vehicle to be assessed. The vehicle may be
subject to a single modification or a combination of modifications. If the vehicle has been
subject to a number of modifications, the assessment must ensure that the cumulative effect
of all the modifications are considered.
a. A change in the vehicle’s suspension –
i. that increases the vehicle’s ride height between 50mm and 125mm; or
ii. of up to 125mm that combined with an increase in the diameter of the wheel and
tyre combination of up to 50mm increases the vehicle’s ride height between
75mm and 150mm.

[Nanook]

Simple answer in NSW, it's 2" suspension lift and 1" tyre lift without an engineers report.

You can't go 3" suspension and leave the tyres as they are either. You can only do both together or ether one or the other.

[matp]

Thanks mate, forgive my ignorance.. in order to have a 1" tyre lift what size tyres in inches are the largest i can have?

[Clarky]

Also there is limits to rim and tyre sizes.
In NSW rim width (not tyre) is limited to 1" wider then original rim width
ie Wrangler rims are 7.5" wide so 8.5" is max without certification.

Tyre diameter is allowed up to 7% greater then largest stock option.
33.5" tall tyre sits around 7%, a 305/65r18 is 6.6% taller then the 245/75r17's stock Wrangler size.

Note: tyre width is limited by what will fit an 8.5 inch rim.

[ren0vator]

What size tyres came standard on your Wrangler?

[Clarky]

Use this calculator to figure out the difference in height and width
http://www.rimsntires.com/specspro.jsp

[matp]

What size tyres came standard on your Wrangler?
No idea i bought it with aftermarket ones allready on and they are 31"

[ren0vator]

www.wheel-size.com (https://www.wheel-size.com)
Lists 5 different sizes for 2011 Petrol Wrangler

Go check your tyre placard :D

[Clarky]

Stock are 245/75/17. Some early Rubicon's had 255/75/17 Current Rubicon's have 255/70/18

[ren0vator]

Same as us then
275/75 R17 on 7.5" wide rims
285/70 R17 on 8" wide rims

But that all depends on guards, brake lines and ball joints

[matp]

Stock are 245/75/17. Some early Rubicon's had 255/75/17 Current Rubicon's have 255/70/18

Thanks mate you seem to really know your tyres! I didnt know re the with of rim you mentioned. I really dont understand the tyre sizes its something i will have to learn. If i where to get a 2" lift what are the largest tyre i could get ? I measured my current ones from bottom to top and they measure 31" but they are not stock neither is the rims. Thats all i have to go off in comparison until i understand sizing.. I am just trying to figure out what it will look like from pics of same setup online and read on maneuverability etc..
I beleive my tyres are Kummo road venture At 265/70 and as i mentioned from top to bottom they measure 31" Rim from left to right measures 18.5"
Just curious if with a 2" lift i can legally have bigger tyres than current ones and if so how much bigger, This way i can look online with same setup and see if it would be worth doing so i can compare look to current setup vs max legal height.

[matp]

all pics online of lift kits and tyres setups seem to mention in inches rather than the actual measurement you see on the tyre.. Every time i see pics posted you hear 3.5" lift on 35" they always refer to tyres by inches hence my confusion. When i read the 265/70 on my tyre i got no idea what that means or how to compare with ones i see on the net.. I read you measure from bottom to top to get the inches they refer to and that's what i did to compare lol.. Hoping i can legally go a bigger tyre than the aftermarket ones i already have making the the ride height much bigger with the inclusion of the lift as well..

[ren0vator]

Here R
Originals on the left, Current on the right
You are already an 1.2 inches bigger (0.6 inch lift)

https://lh3.googleusercontent.com/Dz8s-nTdC0Zgsm0J4pl97hu9NUSGeIIHYAsn64rmPHTN1FAUsDE-5vW46VihSoHfsejaUrZcbGsqadtXBUYHHOnux1vfCIHQ1jKUmP ubrz1025S07UNK39TpaXl_yA8JGsRZ4Hh58g (http://www.rimsntires.com/specspro.jsp)

[Clarky]

Factory Silent Armor tyres 245/75/17 are in old language a 31.5inch tyre 265/70/17 are close enough to the same diameter only 4mm difference.

33 inch tyres are 1.5 inch taller then stock. You will get 3/4 of an inch lift out of that. That's 19.5mm.

So a 2inch lift (50mm) and 33inch tyres (=19.5mm) = a 2 and 3/4 inch height increase. That's 69.5mm lift, 5.5mm of wiggle room.

[matp]

Thanks im having a hard time understanding that graph.. lol but if you say that 31" provide 1.2 that means to stay legal id have to have 30" tyres.. that sux.. I would like to go 4.5" and 35s ideally :( i was willing to settle on 2" and 33s ... wonder how expensive it would be and if doable to get a engineer to certify a higher lift ..

[matp]

Factory Silent Armor tyres 245/75/17 are in old language a 31.5inch tyre 265/70/17 are close enough to the same diameter only 4mm difference.

33 inch tyres are 1.5 inch taller then stock. You will get 3/4 of an inch lift out of that. That's 19.5mm.

So a 2inch lift (50mm) and 33inch tyres (=19.5mm) = a 2 and 3/4 inch height increase. That's 69.5mm lift, 5.5mm of wiggle room.

Shit sorry you clearly explained there my bad dont know how i missed that..
So stock 2011 sports unlimited wranglers where fitted with 31.5" tyres you say ? Also from my understanding of gov text on their page max lift kit is 50mm on its own or combined 75 total lift meaning i cant go higher than 2" lift kit and remaining 25mm can be of up to what ever tyre makes up closest to that 25mm difference no ? So could i put 35" ? im having a hard time believing stock jeeps came with 31.5" tyres though as mine look a fair bit bigger than all the stock ones i see on street.. But i would love it if that is the case as it could mean i can increase :)
Mine is a 2011 wrangler Sport unlimited 3.6L V6 (4door) by the way.

[Clarky]

For every inch of tyre over stock ad 12.5mm in height.
35inch tyres are 25mm taller then 33's

69.5mm + 25mm = 94.5mm. Need certification and probably 4" lift to fit.

If you don't want to get engineered and stay within NSW reg's 33's and 2" lift is it.

If you don't want to spend big $$ on drive line upgrades then 33's are a great option, diff ratios can handle them (depends on how hard you push it) and fuel economy will be acceptable.

If you really want 35's it would be cheaper in the long run to get a Rubicon. Bigger diffs, lower ratios and factory lockers.
But certification would still be required.

[matp]

Clarky you sir are a genius! thank you kindly ! Much more helpful than every 4x4 store In syd that i rang! Many thanks Pal truly.

[matp]

On a totally unrelated topic whilst i have your expertise, fuel consumption i travel 300+ kms on single trip then back once per week + my daily to work/home and fuel consumption on the 3.8L V6 is already pretty damn bad.. how much impact would this have on fuel consumption and is there anything i can do to better it ??