Drop spindles + wheels

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Hi , Im buliding a chev truck with airbags and whatnot and want to get a set of wheels and drop spindles out of the states, what are the requirements for the cert as far as these go ?
Ive heard of some guys requiring yield strength tests and whatnot for the spindles, which are a bolt in replacement for the stock spindles. As for the wheels Im assuming they carry some sort of US DOT approval.
While Im here what s the minimum height requirement for a vehicle with airbags ? does the 100mm rule still apply ?

Any advice ?

Thanks

[kendall]

Hi

<Edited 8th Dec 2008. Edited text is within the < >. Edit by Justin>

<Your LVV Certifier will inspect the spindles during the certification process. If the LVV Certifier is satisfied that the manufacture and construction of the spindle up to a high standard, he will pass the spindle. If however he is not satisfied (for example if the spindle is of inferior quality, or has been welded, or he is unhappy with any aspect of the quality of the spindle) he will refer the item to the Technical Advisory Committee for component approval.> In this case the new dropped spindles will need to come with paperwork <if available. If not available tests MAY be required> to say what material they are made from and what heat treatment processes they have had and this information forwarded to the Technical Advisory Committee.

The wheels if made by a reputable company should be OK.

Your next question is very complex to answer. 100mm rule does not apply. The minimum height is determined by the scrub-line geometry which is explained in the New Zealand Hobby Car Manual. Basically this is a line drawn from the rim height of one wheel across to the point where the tyre touches the ground on the opposite side or front to rear. No part of the suspension or steering can be below this line.

I hope this helps.

Regards

Kendall