Track Width

**rick130** · 13th August 2011, 06:59 AM

Originally Posted by Slunnie

Using a wider axle and offsetting rims back to the standard track is stupid from an engineering perspective
[snip]

Except it actually fixes the scrub radius problem inherent with a portal conversion.

**Bush65** · 13th August 2011, 11:22 AM

Quote from the QLD transport site where the document Slunnie linked to is found
Light vehicle modifications (Department of Transport and Main Roads)

Note: The National Code of Practice – Light Vehicle Construction and Modification has been finalised by the Australian Motor Vehicle Certification Board and will soon replace the Queensland Code of Practice: Light Motor Vehicles.

That will help some (incl me) as the National Code requirements are more sensible with regard to replacement axles.

I bought the hard copy of the QLD code before they put the pdf version on line. At that time they had the comment on their book store that it would soon be changed, but made no mention that it would change to the National Code ... For bringing this to my attention I am grateful to Slunnie

Serg,

130 wheels are 1/2" wider (as you know), but the increase is all outward (decrease to offset) compared to the narrower wheels on 110's. I would try arguing that the 1" greater track for 130's should be applicable for 110's.

**rick130** · 14th August 2011, 04:24 AM

Originally Posted by Bush65

[snip]
Serg,

130 wheels are 1/2" wider (as you know), but the increase is all outward (decrease to offset) compared to the narrower wheels on 110's. I would try arguing that the 1" greater track for 130's should be applicable for 110's.

Except IIRC the Federal RCVS documents don't list the track width differences accurately (at all) and never have, they are all over the place.

Certification Unit Details

**wagoo** · 14th August 2011, 06:39 AM

Originally Posted by rick130

Except IIRC the Federal RCVS documents don't list the track width differences accurately (at all) and never have, they are all over the place.

Certification Unit Details

Even LandRover themselves have been slack at listing differences in track dimensions for models sharing identical axles.
Eg, series 2a, swb with 5.00'' wide rim, LWB-5.5''-extra width outboad, 2A Forward Control-6.5''-extra again outboard. All listed on dimesion charts of contemporary owners and maintenace manuals IIRC as having
a wheel track of 51.5''.
Wagoo.

**uninformed** · 14th August 2011, 02:17 PM

was there and alloy rim option from dealer on the 110 in 1998? if so what size and offset/backspace?

**Bush65** · 17th August 2011, 09:59 AM

Originally Posted by Slunnie

Using a wider axle and offsetting rims back to the standard track is stupid from an engineering perspective and i would be very surprised if any states RTA would make this a rule as it will have axles operating well outside of their design and loading tolerances. The standard track is irrelevant to the safer operation of a replacement axle. I would check this with another engineer at your RTA or with an approved engineering signatory.

NCOP - which may or may not be a part of your regulations:

http://www.infrastructure.gov.au/roa..._2011%20v3.pdf

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I agree with your comments about fitting a wider axle then offsetting rims back to standard track width.

I have looked into this a little further - current QLD light vehicle mods.

The current QLD light vehicle mods only cover replacement of the rear axle, no mention of front axle replacement. In this sense the requirements for track width and wheel stud pattern, etc. make sense.

Hopefully they will soon adopt the NCOP, as stated on their web page.

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