11 replies to this topic

[sibhs]

G'day boys,

Just purchased a LJ and noticed the rear tyres are 225/60 13 and the fronts 205/60 13.
It took me a week to realise this so it's not that noticable when on the car.
Question is, when I've finished the car and it goes over the pits, is it legal or will they spit the dummy.

This is a WA law question.

Cheers
Marty

[Ice]

All tyres must be of the same size unless some one changed the rules but i doubt it

[ls2lxhatch]

There is no problem with different width/profile front and rear tyres within limits.

See page 21
http://www.infrastru...Jan_2011 v3.pdf

4.2.5 Tyre Aspect Ratio
Because of the different handling characteristics, the aspect ratio of tyres fitted to the front axle must not vary by more than 10 from the aspect ratio of tyres fitted to the rear axle (e.g. 175 65 R14 front and 205 45 R14 rear, has an aspect ratio difference of 20 and is not recommended, whereas 175 65 R14 front and 195 60 R14 rear has a difference of 5 and has similar handling characteristics).

[axistr]

It states in our rego inspection rules that the tyres and rims must be the same size and cobstruction on the one axle, but does not mention from front to rear. Our beamer come from factory with 245x17 front & 265x17 rear. And no bloody spare.

[sibhs]

reading point 4.2.5 it may be legal as long as the aspect ratio is under 10. God knows how you work that out?

[ls2lxhatch]

reading point 4.2.5 it may be legal as long as the aspect ratio is under 10. God knows how you work that out?

Your tyres have the same aspect ratio (60). What they are saying is you can have a maximum aspect ratio (profile) difference of 10. For example 50 front 60 rear or 40 front 50 rear but not 40 front 60 rear.

225/60 13 and the fronts 205/60 13

There is also a rule regard difference in width but you are within that.

I have WA approval for 215/40/17 fronts and 235/40/17 rears.

Edited by ls2lxhatch, 03 August 2012 - 10:52 PM.

[WA1TNC]

What about people that run say 18" on the front & 20" on the back? I ask because I want to run 16" ve chasers fronts to clear my brakes & 15" vb-vz rims on the back because I've got a shed load of them.

[ls2lxhatch]

If you can do it within the following rules then I don't see anything about the front and rear rims having to be the same diameter.

4.2.4 Overall Nominal Diameter
The overall diameter of any tyre fitted to a passenger car or passenger car derivative must not be more than 15mm larger or 26mm smaller than that of any tyre designated by the vehicle manufacturer for that model.

4.2.5 Tyre Aspect Ratio
Because of the different handling characteristics, the aspect ratio of tyres fitted to the front axle must not vary by more than 10 from the aspect ratio of tyres fitted to the rear axle (e.g. 175 65 R14 front and 205 45 R14 rear, has an aspect ratio difference of 20 and is not recommended.

4.2.8 Maximum Passenger Car Tyre and Rim Width
Tyres fitted to passenger cars or passenger car derivatives must not be more than 30% wider than vehicle manufacturer’s widest optional tyre. The rim width must not exceed the recommendations for the tyre fitted.

[WA1TNC]

Yeah I used to have a VY SS & I put VE SSV 19" rims on there, I just took them to Ajax & got them to machine the centre lip off them which allowed them to be bolted on, as long as you use the flared lug nuts so it centers the stud in the middle of each hole they bolt up fine. I was going to get them to widen a set of 15" chasers & see if they can do the machine work to the VE 16" steelies.

[RIM-010]

Pretty sure tyre fryer (matt) has VE 16" stockies on his LC...