Know your tech rules

[sundee]

I've been doing a bit of reading, both on forums and it seems that alot of guys have there own idea of what rule is what. This is stuff we all need to know backwards if you want to avoid the defect notice , obviously to a point.
But eg, if a cop says your wheels are to big.

Ok - on your 86 , it came factory with 14 x 5.5 +18 with 185/60/14 rubber
It's not about rim size it's rolling diameter.

So to work that out in mm:

Rim 14 x 25.4 = 355.6 mm
Tyre profile is that percentage of the tyre width, so:
Find 60% of 185mm = 111mm
Multiply that by 2 = 222mm
Then add the rim dia + tyre Profile heigh
355.6 mm + 222mm = 577.6 mm is your standard rolling dia.

so we can go down to an RD of 562.6mm and up to DR of 592.6mm

Now for a 15' rim with a 205/50
15 x 24.5 = 381 mm
50% of 205 = 102.5mm
So : 367.5 + 2(102.5) = 586 mm

16" Rim w/ 225/40

16 x 25.4 = 406.2
40% of 225 = 90mm
SO : 406.2 + 2(90) = 587.2mm

Soon an you go up to a 45 profile on a 16' rim your RD blows out to 608.7mm

So that should give you a rough idea on how big you can legally go.

You have an allowance of + or - 15mm from the largest option given by the manufacturer, in our case it was offered in a 13 and 14' rim.


Here is a few links, I've still gotta find a few that I didn't bookmark so I'll post as I retrieve them.

You can read all about it. And ride height and everything else here:

ADR's
http://www.infrastructure.gov.au/roads/motor/design/index.aspx

AVSR ( Australian vehicle standard regs)
http://www.ntc.gov.au/filemedia/Reforms/AVSRConsolidated22August2007.pdf

ADR bulletin Wheels,tyres,suspension
http://www.infrastructure.gov.au/roads/vehicle_regulation/bulletin/pdf/NCOP11_Section_LS_Tyres_Suspension_Steering_V2_1Ja n_2011%20v3.pdf

[sundee]

http://www.infrastructure.gov.au/roads/vehicle_regulation/bulletin/vsb_ncop.aspx

[randomskate]

good thread!

now lets talk about legalities of exposed air filters/ no airfilters, sheilds etc haha trying to find it now on the link u gave, thanks

[sundee]

There are also NSW laws to consider, I'll post them soon. really what a joke this should be it.
Eng + rego in nsw... Drive to Qld .. Defect! What the?

[randomskate]

To be honest I do see the logic in that, you step in their turf you abide by their law. If you plan on driving in QLD you should meet their requirements. Pretty shit though, they should just stick to one standard australia wide..

[slide86]

None of this, or anything for that matter, applies in SA.

You will get defected regardless.......

Police state

[AJPS]

25.4 should be the multiplier?

[Skylar]

Yeah, should be 25.4.

Seemed odd that you got a height of 572 for a 205/50R15 when I know a 195/50R15 is 577.

[sundee]

Close but no cigar hay, I'll fix it up later

[Sam-Q]

don't our sprinters come with 13s stock?

[randomskate]

i thought mine we're 14's, i got stock wheels on mine but never really had a check. Sam, you know anything about legalities of exposed air filters in australia or nsw by any chance? would it be sweet if I had one exposed but secured. i have to get it engineered for my surge tank anyway, would this air filter setup need to be engineered? thinkin of just a K&N Pod going down where the charcoal canister sits and a little heat sheild or something maybe. I can't find anything using google or search function about this. Apparently there is differnt rules for pre 1986 cars, but since i'm changing the engine, I have to put a Cat in the exhaust i read from the PDF in the link Joel posted.

[randomskate]

yeah make sure u put a cat in your exhaust... thanks google haha

http://www.allfordmustangs.com/forums/attachments/fun-zone/65275d1238342212-official-funny-cat-pictures-thread-funny-picturs-cat-exhaust.jpg

[sundee]

Sorry for the conversion stuff up, I've re jiged it and I'll update the number when I get to a computer(can't scroll in edit mode on iPhone)
But all those tyre/ rim combinations are legal when referring to adr's

[sundee]

don't our sprinters come with 13s stock?
I haven't finished going thru all these doc's BUT it does say that the wheel rolling diameter can be +or- 15 mm of the manufacturers largest wheel option for that model.

I have found that we need to take into account 2 documents:
1 - ADR's which covers vehicles built post 1969.
2 - AVSR's (aust. Vehicle standard regs)

The ADR's don't cover all saftey features of vehicles built between 1969 and 1988.
Those matters are covered in the AVSR's
It says if your car complies with the AVSR's it is generally suitable for road use.

( 1st post will be edited with all the relevant info when I get to a computer)

AVSR's

http://www.ntc.gov.au/filemedia/Reforms/AVSRConsolidated22August2007.pdf

[lolwat]

this all well and good but a coppa and/or even a blueslip inspector doesnt go off rolling diamiter, goes off tyre placard (cant spell)
but yes that is the "rule" doesnt mean you will get way with saying that though

[sundee]

in that case if you get defected you can take it to court, because all a judge cares about is whats written in Law, not some coppas opinion

1st post updated.

[lolwat]

that is very true, but (i know your point is valid and all not trying to be negative) you taking them to court pretty much puts a big fuck off size target on you

[sundee]

plenty of cases have been won because the cops "opinion" is not stated in any law.
in the end of the day, dont be a smart ass, be nice, dont be afraid to tell them the law (politely) even keep a copy of the regs in your glove box so you can show them this is the law, if you defect me it just going to go to court.
the key it dont be a smart ass just be smart.

[Hachi_Tom]

had a read of the ADR's but couldn't find anything on tyre stretch and the legalities..

cannot be bothered at this point in time to read the other two, but maybe you have seen it in them?

any rules stating stretch being a problem?

[sundee]

Not that I have read yet

[pen15]

very interesting stuff i would like to print this out hey but as mentioned before whats the go with exposed throttles?

[sundee]

as far as i'm aware, any exposed intake is defect

[randomskate]

do you mean exposed intake, as in it has no air filter at all (trumpets for eg), or just no sheild over the air filter?

im thinkin of just having an exposed K&N pod piped inside the front bumper after i move the charcoal canister somewhere else