on road duals - might certified wheel spacers etc to clear the ladder frame with the inside dual etc.
tweake,
Nov 11, 10:41am
one small detail for onroad use is the mud flaps which need to be extended down to comply with the 1 in 3 rule, which puts them really close to the ground making it a total pain for offroad. (i got failed on mudflaps recently so its something i had to look up).
kazbanz,
Nov 11, 10:47am
Chains mate :-) -at least for the rears. literally shorten the chain up to haul them outa the way when offroad.
martin11,
Nov 11, 10:47am
Lots of Jacked up 4x4 's around canterbury would fail then on mudflaps
tweake,
Nov 11, 11:31am
yes, same as trucks.
tweake,
Nov 11, 11:34am
that rule only applies to dual wheeled vehicles and there is very few of those under 3 ton. i think it was some of the mazda vans that had those dual tiny tiny rear wheels.
serf407,
Nov 11, 2:41pm
Toyota Tacoma dually, usa - with dual rears looks a bit silly.
You can do what ya like in the US of A. Might find some different rules apply here.
mrfxit,
Nov 13, 4:35am
Pretty sure it's a cert job for on road usage. The bearing loadings would be massive compared to a single wheel
bill-robinson,
Nov 13, 10:41am
where does the "massive load" come from?
sr2,
Nov 13, 11:04am
Although I wouldn't describe it as a "massive load" I think he's referring to the effect of the huge amount of (or equivalent of) negative offset needed to fit dual rims on a standard single rim rear end. This significantly increases the leverage on the hub. If you look at standard dual wheel setups the combined offset of the dual rims is usually close to zero for optimum load carrying capacity and the suspension is engineered to suit.
I suspect the LVVTA Gestapo would pull this little gem out for you!
(a) the fitting of a complete dual-wheel axle assembly sourced from a production vehicle of similar or greater weight; or
(b) the fitting of another single wheel axle that was sourced from a vehicle that is substantially heavier than the vehicle to which the axle assembly is now fitted; or
(c) the conversion of the original single wheel axle to a semi-floating or fully floating hub axle assembly.
mrfxit,
Nov 13, 5:00pm
Weight of two complete wheels verses one single wheel on an axle & bearing set designed for a single wheel. The extra leverage & weight would probably be ok if you only ever drove at low-ish speeds on smooth sealed roads. Impact forces on the std bearing sets would be increased dramatically on substantial bumps.
It was a common problem with 50's / 60's/70's English & small USA cars when fitting super wide tyres on the skinny bearings of the day.
mrfxit,
Nov 13, 5:03pm
Exponentially increased impact loads from common road hazzards
sr2,
Nov 13, 5:30pm
I think he may have got carried away with the semantics?
bill-robinson,
Nov 14, 6:56am
i think the OP did a windup with this.
mrfxit,
Nov 14, 10:30am
Possibly but ppl do this sort of mod from time to time anyway for various reasons
bill-robinson,
Nov 14, 1:09pm
shows just why we have the modification rules that are in place. brain dead people on the roads.
mrfxit,
Nov 14, 4:25pm
Theres no doubt at all that we needed a good set of regulations for modding vehicles. BUTT, it's gone way to far to the left now & the costings are prohibitive for even minor mods.
bill-robinson,
Nov 15, 1:32am
but it does not stop idiots from modifying cars some of the kit you can buy from 'reputable' scources is poorly made junk and no use as a fishing sinker.
mrfxit,
Nov 15, 2:25am
True but I was referring more to these type mods . . . 351 v8 in a stock Escort body 253 v8 in a stock Viva Rotary in a Bambina Hell, rotary in any small stock ex baby 4cyl car
alowishes,
Nov 15, 3:33am
You could buy a Chev V8 powered Viva brand new from the showroom in South Africa, likewise a Ford V8 Capri from the Ford dealer.
alowishes,
Nov 15, 3:41am
I’m interested in such ‘kit’ ( purely to experiment with its suitability or otherwise as a fishing sinker) can you describe the kit you mentioned - and where can I buy some?
mrfxit,
Nov 15, 4:10am
Even the factory versions were lethal, never mind a lot of the home jobs slapped together. One guy I knew had a 350 chev & valiant diff in a stock standard Hillman hunter. Twisted the body first time he planted his boot.
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