by angib » Tue Nov 10, 2015 10:55 am
Using the same spare is surely something taught in 'wise old man' (I'm being polite here) school, by wise old men who haven't done it themselves?
As well as the bolt pattern, you have to consider:
- center bore (the diameter of the hole in the center of the wheel) and the diameter of the HF hub;
- offset;
- wheel/tire size.
To put Tacoma wheels onto a HF trailer, an adapter would be needed to convert from HF bolt pattern (4x101.6mm?) to one of the Tacoma bolt patterns (5x114.3mm or 6x139.7mm). This will push the wheel outwards which may be helpful because the Tacoma wheel offset will something like 30mm, whereas the HF wheels are zero offset.
The center bore on the Tacoma wheel (106.1mm) so that will fit over the HF hub if it needs to - but then the adapter will space the wheel away from the hub.
Next thing to consider is wheel offset and width. Temporarily increasing the offset by using an adapter (only when the spare is fitted) would not concern me, though it wouldn't be good practice for permanent use. But then the tire on the Tacoma wheel (presumably full size) will be between 245 and 265 width, so it that won't be able to be bolted onto the HF trailer as it would be hard against the frame rails or body side wall before the wheel touches the adapter. To get round that a massively thick adapter (say around 100mm thick) could be custom-made, to space the Tacoma wheel/tire out from the hub so its inside face is no further in than the inside face of the HF wheel/tire was.
But then you hit the final problem, that the tire on the Tacoma spare will be much bigger overall diameter than the HF wheel/tire, so the trailer fenders would have to be made removable so that the Tacoma spare could be fitted - or else mounted comically high up.
When all that is done, the custom-made adapter will cost many times as much as a HF spare wheel/tire. The sensible thing is really to just buy a HF spare wheel and fit that to the trailer.