Longer vehicle

Submitted: Monday, Sep 23, 2019 at 17:16
ThreadID: 139096 Views:1801 Replies:12 FollowUps:22
This Thread has been Archived
Do those in the know know if you are allowed to put a single cab tray on an extra cab chasis? not worried about weight distribution etc. Just whether you can do it or please suggest a place to find answers.
Back Expand Un-Read 1 Moderator

Reply By: Kazza055 - Monday, Sep 23, 2019 at 17:36

Monday, Sep 23, 2019 at 17:36
Can't see why you couldn't as long as it fits the ADR.

What you really need to be careful of is overloading the rear section and bending the chassis.

And once you have extended the tray does this mean you will need to move the tow bar back to make it accessible which again is creating more problems and the likely hood of more stress on the chassis.
AnswerID: 627808

Reply By: GG7777 - Monday, Sep 23, 2019 at 17:43

Monday, Sep 23, 2019 at 17:43
From memory....
there is a ruling that :- the overhang behind rear wheels cannot exceed more than 40% of wheelbase.
I believe this to be so for trucks thus carried over to light vehicles
Murray
AnswerID: 627809

Follow Up By: Athol W1 - Tuesday, Sep 24, 2019 at 11:18

Tuesday, Sep 24, 2019 at 11:18
GG7777

The maximum rear overhang for any vehicle is 3.7 metres or 60% of the wheelbase, whichever is the LESSER, and this is measured from the centre of the rear axle or rear axle group, and this measurement applies to both the vehicle construction AND any loading which may be carried.

Regards
Athol
1
FollowupID: 902030

Reply By: RMD - Monday, Sep 23, 2019 at 18:55

Monday, Sep 23, 2019 at 18:55
If 40% of wheel base, for a 3200mm wb means 1.28m MAX rear of rear axle centre. That is a long way out.
AnswerID: 627811

Reply By: Ron N - Monday, Sep 23, 2019 at 19:48

Monday, Sep 23, 2019 at 19:48
The overhang behind the rear wheels allowable is actually 60% of the wheelbase, or 3.7M, whichever is the lesser measurement.

So that means you probably can fit a single cab tray to a dual cab.
But the average single cab tray is 2.4M long, while the average maximum length for a dual cab tray is 1.6M.

The extra 800mm is going to stress your chassis an enormous amount, and I personally, wouldn't recommend the fitting of a 2.4M tray to a dual cab.

In addition, a very long tray such as you are thinking of, will seriously affect vehicle handling when loaded, causing vicious oversteer, if you do even a mild swerve.

Google "bent ute" and images, and you'll see plenty of examples of bent chassis' on dual cab utes, that generally have a lot shorter trays than 2.4M.

Excessive ute tray overhang discussion

Cheers, Ron.

AnswerID: 627812

Follow Up By: thinkin - Monday, Sep 23, 2019 at 21:47

Monday, Sep 23, 2019 at 21:47
Won't make a huge difference but the question was for a "space cab, extra cab", not dual cab. And if the make of vehicle was given it might have helped a bit.
For example, Triton vehicle has 3000mm wheelbase current Ranger, Mazda have 3220mm wheelbase.
Average tray length for Mazda extra cab is about 2000mm.
1
FollowupID: 902014

Follow Up By: Ron N - Monday, Sep 23, 2019 at 23:31

Monday, Sep 23, 2019 at 23:31
Ahh, my error - I misread space cab for dual cab, because dual cabs are in the vast majority.

The red space cab Ranger on the tray manufacturers site below, is fitted with a 2.4M tray, the same length as most single cabs - so it's legal.

Unicorn trays photo gallery

However, there's another angle that rears its head here, as well.

If the OP is changing the overall length of his already-registered vehicle, he will have to have the vehicle re-inspected and re-measured, and the rego record amended accordingly.

Cheers, Ron.
0
FollowupID: 902018

Reply By: Michael H9 - Monday, Sep 23, 2019 at 20:42

Monday, Sep 23, 2019 at 20:42
Going on the numbers posted, I reckon you'll just about halve your load carrying capacity on the tray if you add another 800mm behind the axle.
AnswerID: 627814

Reply By: Dion - Monday, Sep 23, 2019 at 21:11

Monday, Sep 23, 2019 at 21:11
Gusthebus,

I must have been the only one to have seen you say you're not worried about the weight distribution.
Measurements aside, make sure rear light assemblies and numberplate are at the rearmost of the tray, and can be seen from all the angles specified.
AnswerID: 627815

Follow Up By: RMD - Monday, Sep 23, 2019 at 22:23

Monday, Sep 23, 2019 at 22:23
Dion
I would think everyone saw the, "not worried about weight distribution", but have trouble believing anyone would not worry. Simple reason is, for basic safety and insurance purposes besides the possible stress increases, you could not possibly disregard the issue. The lights would have to be seen anyway.
0
FollowupID: 902015

Reply By: Dion - Monday, Sep 23, 2019 at 21:13

Monday, Sep 23, 2019 at 21:13
And be wary of end swing.
AnswerID: 627816

Reply By: Member - nickb "boab" - Monday, Sep 23, 2019 at 21:28

Monday, Sep 23, 2019 at 21:28
Gusthebus So your wanting to put single cab tray on a Extra cab ( Not twin cab ) there's not a huge difference in length maybe 400mm
At least that's was the differents from my old SC triton to my super cab ranger .
It would be a big help if you gave some sizes for people make a proper judgment .
and even explanation of why you want to do the change . obviously there would be some problems if the a tow bar on the vehicle .
Cheers Nick b
VKS 737 ( 0915 )
Wish the missus was as dirty as the tailgate

Member
My Profile  My Blog  My Position  Send Message

AnswerID: 627817

Follow Up By: RMD - Monday, Sep 23, 2019 at 22:26

Monday, Sep 23, 2019 at 22:26
If he is only 1 metre tall then trailer hook up will be quite ok.
2
FollowupID: 902016

Follow Up By: Member - nickb "boab" - Tuesday, Sep 24, 2019 at 10:28

Tuesday, Sep 24, 2019 at 10:28
The Topic says it all ..... loonnnggg vehicle
Looking at the photograph :(((
Cheers Nick b
VKS 737 ( 0915 )
Wish the missus was as dirty as the tailgate

Member
My Profile  My Blog  My Position  Send Message

0
FollowupID: 902028

Reply By: Gusthebus - Tuesday, Sep 24, 2019 at 06:59

Tuesday, Sep 24, 2019 at 06:59
Thanks all for advice so far. A mate is doing it and i saw it for myself today and can't believe it's legal but cant find any indication that it's not.. Obviously weight distribution is poor-yet legal?
AnswerID: 627819

Follow Up By: Phil B (WA) - Tuesday, Sep 24, 2019 at 07:28

Tuesday, Sep 24, 2019 at 07:28
Now thats some serious overhang, Check ouit article about what causes a ute chassis to bend.
https://www.whichcar.com.au/reviews/bent-utes
There is a lot of difference between
‘Human Being’ and ‘Being Human’.





Lifetime Member
My Profile  My Blog  Send Message

0
FollowupID: 902019

Follow Up By: Member - nickb "boab" - Tuesday, Sep 24, 2019 at 10:21

Tuesday, Sep 24, 2019 at 10:21
Lets hope is dosen't want to tow !
I wud say.... OMG !!!
Start looking for quotes for repairs to a bent chassis LOL ;))
Cheers Nick b
VKS 737 ( 0915 )
Wish the missus was as dirty as the tailgate

Member
My Profile  My Blog  My Position  Send Message

0
FollowupID: 902026

Follow Up By: Athol W1 - Tuesday, Sep 24, 2019 at 11:39

Tuesday, Sep 24, 2019 at 11:39
Whilst it is not necessarily accurate taking measurements from the photo this vehicle appears to have a rear overhang similar to that of the wheelbase, and as such it would NOT comply with any of the ROH laws in Queensland or the ADR's.

A Toyota Hilux has a wheelbase of 3.0 metres, so the maximum ROH would be 1.8metres. The only possible chance of the weight distribution being acceptable would be to place all of the loading at the very front of the load area.

Regards
Athol
0
FollowupID: 902032

Follow Up By: Gusthebus - Tuesday, Sep 24, 2019 at 12:56

Tuesday, Sep 24, 2019 at 12:56
Thanks all. Athol,scuse my ignorance, so are you saying the distance between axels is 3 meters and the distance from rear axle to end of tray cat be more than 60% of this distance (the 1.8m you quoted). Thanks for all the input. Oops just saw your first post athol which answers my question. Ta.
1
FollowupID: 902035

Follow Up By: Ron N - Tuesday, Sep 24, 2019 at 14:13

Tuesday, Sep 24, 2019 at 14:13
Allan, if the vehicle in the photo is a 1990 extra-cab Hilux LN111R, as I suspect it is, the wheelbase is actually 2840mm.

That would make the allowable overhang behind the centre of the rear axle, a maximum of 1704mm.

The LN111R extra cab and the dual cab LN106R shared the same "long chassis" (Toyota description).

Cheers, Ron.
0
FollowupID: 902038

Follow Up By: Athol W1 - Tuesday, Sep 24, 2019 at 14:40

Tuesday, Sep 24, 2019 at 14:40
Thanks Ron, I was going from memory having measured a few on the roadside as part of my job at the time, but over 10 years has passed since then so some of the individual vehicle specs could be getting a little fuzzy.

Athol
1
FollowupID: 902040

Follow Up By: Gusthebus - Tuesday, Sep 24, 2019 at 15:26

Tuesday, Sep 24, 2019 at 15:26
Thanks and well done Ron. 2840 wheelbase. As it ONLY sticks out 1540 it appears within legal parameters. Im surprised to learn how much can stick out the rear of a vehicle.
1
FollowupID: 902042

Reply By: Member - Neil T6 - Tuesday, Sep 24, 2019 at 07:46

Tuesday, Sep 24, 2019 at 07:46
G'day Gusthebus, I have a single cab Dmax with the 2600mm tray. There's 1340mm from the centre of the rear axle to the back of the canopy and I have a tool box behind each rear mudflap, spare wheel and towbar.
I'm not prepared to put any more weight behind the rear axle and I don't tow anything.
However some single cab trays are shorter than 2600mm so you may be OK.
I live in Cairns and you're welcome to have a look at my ute if you're interested.
AnswerID: 627820

Follow Up By: Gusthebus - Tuesday, Sep 24, 2019 at 16:03

Tuesday, Sep 24, 2019 at 16:03
Thanks for the offer. This one sticks out 1540 from axle. Just surprised to learn how far out they csn legally go - 60% of wheelbase. Great time of year in cairns eh.
0
FollowupID: 902046

Reply By: Member - rocco2010 - Tuesday, Sep 24, 2019 at 09:44

Tuesday, Sep 24, 2019 at 09:44
Overhang? what overhang? Canadian camper.



AnswerID: 627823

Follow Up By: Ron N - Tuesday, Sep 24, 2019 at 10:14

Tuesday, Sep 24, 2019 at 10:14
Hey Rocco, the cure to excessive overhang is simple! Another set of wheels! [;-)

Overhang

Cheers, Ron.
0
FollowupID: 902024

Follow Up By: Member - rocco2010 - Tuesday, Sep 24, 2019 at 10:17

Tuesday, Sep 24, 2019 at 10:17
That wins Ron.
1
FollowupID: 902025

Follow Up By: Ron N - Tuesday, Sep 24, 2019 at 10:21

Tuesday, Sep 24, 2019 at 10:21
I reckon backing that thing, is something I'd like to watch!!

Get a look at the pipe frame under the chassis, in front of the rear wheels, to help hold the camper in place!

It's a whole new ball game in America. BIL went there recently, and said nearly anything goes, on the road there - if you can get away with it, that makes it legal!


1
FollowupID: 902027

Follow Up By: RMD - Tuesday, Sep 24, 2019 at 14:40

Tuesday, Sep 24, 2019 at 14:40
That is quite OK. There is no more %age overhang, possibly less than the Toyota Hilux pictured by the OP.The weight distribution is a bout equal each side of rear axle and the camper bit even nears the front axle. Apples and oranges being compared. Backing not a problem, he has mirrors hasn't he/she. Gotta love gender equity.
1
FollowupID: 902041

Follow Up By: Ron N - Tuesday, Sep 24, 2019 at 17:12

Tuesday, Sep 24, 2019 at 17:12
RMD, I just hope he's got some kind of front axle complete with self-steering spindles under the rear - or turning and/or backing could provide some interesting wheel and tyre contortions.

I've got a tandem car trailer that has suffered from multiple rim cracks simply due to excessive rim flexing when turning - so I hate to think what the rims on that American rig will look like, after a few years.
0
FollowupID: 902049

Follow Up By: RMD - Tuesday, Sep 24, 2019 at 19:51

Tuesday, Sep 24, 2019 at 19:51
RonN
That vehicle is made to carry weight, it is fairly balanced and while there is a fair distance from the rear axle to the actual rear is is in proportion. I cannot see any rim problem at all. No more than the plain vehicle loaded to GVM. The van unit probably isn't overloaded.
0
FollowupID: 902053

Follow Up By: Batt's - Saturday, Sep 28, 2019 at 11:10

Saturday, Sep 28, 2019 at 11:10
Seen a pic where that snapped in half some people have no concept of things and it's such an inconvience having to tow heavy items when you can put it on you back. Might go bigger next time that should work haha.
1
FollowupID: 902133

Follow Up By: Ron N - Saturday, Sep 28, 2019 at 13:05

Saturday, Sep 28, 2019 at 13:05
It's interesting to see the number of Dodge Rams snapping their chassis' in the U.S.

Dodge Ram snapped chassis'

But the second poster with the cracked chassis, then says he carries a 2 tonne camper and tows a ski boat as well.

Doesn't say how big and heavy his ski boat is, but I would've thought a Dodge Ram 3500 (dual wheels) would carry a 2 tonne camper and tow a ski boat O.K. - but maybe that is exceeding the vehicles GCM and GVM.

Some of these big, beefy-looking American pickups don't have the hauling ability they appear to have.

Cheers, Ron.
0
FollowupID: 902135

Reply By: Peter_n_Margaret - Thursday, Oct 10, 2019 at 07:57

Thursday, Oct 10, 2019 at 07:57
The legal limit looks less than you might imagine sometimes.

Cheers,
Peter
OKA196 motorhome
AnswerID: 628095

Popular Content

Popular Products (13)