[ozhummer]

Nearing a mamoth rebuild of my 88 Vitara SWB, but think I may have stuffed up with tyres ! - I have put 235/75 15's on the original (although newly powder coated) rims.! - Trouble is in QLD you can only increase the wheel radius by a total of 15mm ! - mine are about 20mm !

It will really piss me off if I don't get a roadworthy, this car has had every moving part and almost every replacable part replaced! - It's perfect!... so to be picked up on that would shit me no end!...

Has anyone with that size tyre got a RWC in Bris ???? if so can you tell me where ?

Or - anyone got a set of wheels I could borrow to get a rwc if I'm knocked back because of them ?

Cheers

[Fatzook]

I doubt they will notice. Its such a small increase in size.

[Zook_Fan]

its an increase of 15mm diameter that is allowed. you might pass but it isn't legal by more than 5mm

[redzook91]

uh oh...

[ozhummer]

Pisses me off how silly the rules are ! - They have been attempting to pass a national set of rules (vrb14) that would unify the rules between states - this would permit an increase of 50 mm on the vit.

Interestingly - I have downloaded the complete set of guidlines for RWC testers from qld transport - this 100 odd page doc goes through everything that makes a vehicle UN roadworthy! - they must follow it.. BUT it does not mention increase in diameter - goes through speed and load ratings, width, and track etc..

[Zook_Fan]

im not 100% sure but don't vits come stock with 205/70R15's? which means that they are ~662mm in diameter. a 235/75R15 will be ~727.5 which equates to an increase of ~65.5mm, and ergo even vrb14 won't help you

[redzook91]

wait is this just on the standard rim or does it apply to the factory specs of the car (if that makes any sense)?

I mean if you change the rim can you go bigger or not? (legally i mean)

[steak_knife]

I'd be more worried about the Calmini kit it has..

[ozhummer]

No Calmini is only the 2" Kit - not the 3" ! so it's legal

[ozhummer]

Zook_Fan wrote:

im not 100% sure but don't vits come stock with 205/70R15's? which means that they are ~662mm in diameter. a 235/75R15 will be ~727.5 which equates to an increase of ~65.5mm, and ergo even vrb14 won't help you

Isn't it just 75% of the difference ? - so 0.75 * 30mm = ~22mm ?

[Zook_Fan]

ozhummer wrote:

Zook_Fan wrote:

im not 100% sure but don't vits come stock with 205/70R15's? which means that they are ~662mm in diameter. a 235/75R15 will be ~727.5 which equates to an increase of ~65.5mm, and ergo even vrb14 won't help you

Isn't it just 75% of the difference ? - so 0.75 * 30mm = ~22mm ?

difference of what? and where did 30mm come from?

[Scrawny]

redzook91 wrote:

wait is this just on the standard rim or does it apply to the factory specs of the car (if that makes any sense)?

I mean if you change the rim can you go bigger or not? (legally i mean)

Same rules still apply if you change the rims

Zook_Fan wrote:

im not 100% sure but don't vits come stock with 205/70R15's? which means that they are ~662mm in diameter. a 235/75R15 will be ~727.5 which equates to an increase of ~65.5mm, and ergo even vrb14 won't help you

Stock is 205/75R15 for Vits


If you have any difficulties getting a RWC let me know, I have someone who will help you

[royce]

steknig wrote:

I'd be more worried about the Calmini kit it has..

no lift law in qld, only reduction of wheel travel

[redzook91]

ScrawnC wrote:

Same rules still apply if you change the rims

So what do ya do if you want to go bigger? Engineers cert. or just do it and hope not to get pulled up...

Ozhummer thanks for bringing this up, I did the same but didn't realise the rules. I wouldn't worry too much though cause I've been pulled up for speeding and the guy didn't bat an eyelid at the tyres...

[Scrawny]

redzook91 wrote:

ScrawnC wrote:

Same rules still apply if you change the rims

Engineers cert. or just do it and hope not to get pulled up...

The latter

[steak_knife]

ozhummer wrote:

No Calmini is only the 2" Kit - not the 3" ! so it's legal

http://auszookers.com/index.php?name=Fo ... c&start=30

The control arm's, can you prove thay don't alter the car's crumple zone??

[ozhummer]

Zook_Fan wrote:

ozhummer wrote:

Zook_Fan wrote:

im not 100% sure but don't vits come stock with 205/70R15's? which means that they are ~662mm in diameter. a 235/75R15 will be ~727.5 which equates to an increase of ~65.5mm, and ergo even vrb14 won't help you

Isn't it just 75% of the difference ? - so 0.75 * 30mm = ~22mm ?

difference of what? and where did 30mm come from?

Difference between the 205 (standard width) and 235 (current width) is 30mm - the profile is 75% of width so and increase of 30 in width = an increase of 75% of the 30mm increase in width so 22mm ish

[coily96]

The rule applies to the maximum height of the tyre, not the rim.

you can go bigger rims, but the tyre will have to get smaller on the wall.

I had 205/70/r15 on my sierra when i bought it. to keep it legal for full comp insurance reasons i went with a 215/75/r15 which is the largest legal tyre.

Id find a set of stock wheel and tyres for the day or find someone that isnt fussy on their roadys.

[ozhummer]

steknig wrote:

ozhummer wrote:

No Calmini is only the 2" Kit - not the 3" ! so it's legal

http://auszookers.com/index.php?name=Fo ... c&start=30

The control arm's, can you prove thay don't alter the car's crumple zone??

Thats where having a pre 1992 airbag less car is a good thing as crash test results for font crumple zones did not have to be submitted until the new ADR rules of 1992 where introduced. The rules that do apply are no changes to bump stops, and lift cannot exceed 30% of the original wheel travel (always just estimated at 50mm).. If any police tries to defect me for suspension, they had better be prepared to feel really stupid in court! ..

[Zook_Fan]

ozhummer wrote:

Zook_Fan wrote:

ozhummer wrote:

Zook_Fan wrote:

im not 100% sure but don't vits come stock with 205/70R15's? which means that they are ~662mm in diameter. a 235/75R15 will be ~727.5 which equates to an increase of ~65.5mm, and ergo even vrb14 won't help you

Isn't it just 75% of the difference ? - so 0.75 * 30mm = ~22mm ?

difference of what? and where did 30mm come from?

Difference between the 205 (standard width) and 235 (current width) is 30mm - the profile is 75% of width so and increase of 30 in width = an increase of 75% of the 30mm increase in width so 22mm ish

yes that would work BUT if i am correct the standard profile is a 70% and you have replaced it with a 75% profile. therefore you need to do the total calculations

[royce]

vits are 205/75, another reason why they are better

lift isnt 30% of original wheel travel, you have to retain 66% of the original wheel travel in bump and rebound, great rule for limiting how much you can lower a car, not so great for lifting

[Zook_Fan]

well there ya go, yes you can go to the 235's if the national law comes in. i totally missed scrawns post.

oh and stockmans have 205R15's which is why they are better

[ras86]

when i bought my sierra it came with a safety cert and it has 31s, 2in body lift, 2in spring lift and a 1.6 without a mod plate. i believe it was inspected by a mobile guy at the gold coast. I knock back vehicles which have mods that are not legal because its me that deals with the penalty if it is involved in and accident. There are plenty around that do write them out though.

[steak_knife]

ozhummer wrote:

steknig wrote:

ozhummer wrote:

No Calmini is only the 2" Kit - not the 3" ! so it's legal

http://auszookers.com/index.php?name=Fo ... c&start=30

The control arm's, can you prove thay don't alter the car's crumple zone??

Thats where having a pre 1992 airbag less car is a good thing as crash test results for font crumple zones did not have to be submitted until the new ADR rules of 1992 where introduced. The rules that do apply are no changes to bump stops, and lift cannot exceed 30% of the original wheel travel (always just estimated at 50mm).. If any police tries to defect me for suspension, they had better be prepared to feel really stupid in court! ..

I work on new Suzuki's all day, I keep forgetting the ole rule's & time thay changed..

[ozhummer]

steknig wrote:

ozhummer wrote:

steknig wrote:

ozhummer wrote:

No Calmini is only the 2" Kit - not the 3" ! so it's legal

http://auszookers.com/index.php?name=Fo ... c&start=30

The control arm's, can you prove thay don't alter the car's crumple zone??

Thats where having a pre 1992 airbag less car is a good thing as crash test results for font crumple zones did not have to be submitted until the new ADR rules of 1992 where introduced. The rules that do apply are no changes to bump stops, and lift cannot exceed 30% of the original wheel travel (always just estimated at 50mm).. If any police tries to defect me for suspension, they had better be prepared to feel really stupid in court! ..

I work on new Suzuki's all day, I keep forgetting the ole rule's & time thay changed..

My Little Zook was No 41 off the line !! MAY 1988! and probably is one of the best (now anyway!)

[Armpit]

I recently got my LWB roadworthied in QLD. Has 30inch tyres and the bloke didn't bat an eyelid at it. Only needed to get modplates for the engine and long range fuel tank.

[lukes_89]

ras86 wrote:

when i bought my sierra it came with a safety cert and it has 31s, 2in body lift, 2in spring lift and a 1.6 without a mod plate. i believe it was inspected by a mobile guy at the gold coast. I knock back vehicles which have mods that are not legal because its me that deals with the penalty if it is involved in and accident. There are plenty around that do write them out though.

dodgey road worthys arnt that hard to find if you know the right people i can get my extended shackles, 31" muds, non mod plated bucket seats, no spare Tyre as it blocks my tail lights, my tail lights on a swinging panel, duel fuel system and whatever else that's on my car through only difference is it will probably cost $100 for the cert and everything was installed after i got the cert if any questions asked

[steak_knife]

lukes_89 wrote:

ras86 wrote:

when i bought my sierra it came with a safety cert and it has 31s, 2in body lift, 2in spring lift and a 1.6 without a mod plate. i believe it was inspected by a mobile guy at the gold coast. I knock back vehicles which have mods that are not legal because its me that deals with the penalty if it is involved in and accident. There are plenty around that do write them out though.

dodgey road worthys arnt that hard to find if you know the right people i can get my extended shackles, 31" muds, non mod plated bucket seats, no spare Tyre as it blocks my tail lights, my tail lights on a swinging panel, duel fuel system and whatever else that's on my car through only difference is it will probably cost $100 for the cert and everything was installed after i got the cert if any questions asked

No it wasn't cause you just posted it on a public forum.

[lukes_89]

but steking i may just decide to get a decent one and remove it all as sunny coast to redcliffe is a long drive in a unregisted zook to get rwc. only the mechanic and i can prove other wise . i may just be some 16 year old kid talking shit to be tough and look cool infront of you

[steak_knife]

lukes_89 wrote:

but steking i may just decide to get a decent one and remove it all as sunny coast to redcliffe is a long drive in a unregisted zook to get rwc. only the mechanic and i can prove other wise . i may just be some 16 year old kid talking shit to be tough and look cool infront of you :P

That would explain a lot.