Thread: D3 trailer hubs

Redback will be along.... What he doesn't know about trailer hubs isn't worth knowing

Not sure on the stud pattern being HQ but I know it is late model Commodore.

Why not use Ford studs in the hubs and get wheels nuts with the ford thread but will match the D3 wheels.

This company sell nuts cheap that should work.

Chrome Lug Nuts - Custom & Replacement from $0.46 each

Originally Posted by ctgiles84

I am under the impression that stud pattern is same as Holden HQ?

You are incorrect.

HQ - WB is an imperial stud pattern.

It's 5x120 if I'm not mistaken.

5 x 120 but IIRC the boss doesn't fit through the cap hole although might with some machining of the boss. Also note that the LR offset puts the rim closer to the springs than usual so the tyres might rub.

The Hubs can be sourced from trailer manufacturers or better still find who supplies their hubs and talk to them and have them fit the studs and machine the hub to correct size. If your trailer has parallel bearings (same size inner and outer) then machining the hub small enough may be a problem. I cannot remember the exact size of the spigot of the D3 wheel but I had to have 3mm machined from the center hole of steel rims for the trailer.

Ivan

Originally Posted by Graeme

5 x 120 but IIRC the boss doesn't fit through the cap hole although might with some machining of the boss. Also note that the LR offset puts the rim closer to the springs than usual so the tyres might rub.

Yes and I found this out the hard way, also the hole is tapered and would be hard and not worth the money to have it machined to fit, and I didn't want to alter the D3 alloys, as they are very rare now, 14mm studs are very easy to optain from trailer parts places, and commodore brakes also easy to get, you will then need to drill them to fit the 14mm studs, 14mm x 1.5 pitch thread wheel nut for steel rims are really easy to get also.

Melbourne trailers will make you drums with 14mm studs to suit the 5 X 120 pattern, but they use 9 X 2 and 3/4 drums, so you'll need to move the drum backing plate bracket to suit, this is what I had to do, I also bought some 17" steel rims to fit to the camper, I can use the trailer rims on the car if I need too, but I can't use the car rims on the trailer, which is unfortunate but you get that.

Here is the difference between Commodore and HQ

Holden HQ - 7/16" UNF studs - 5 Studs - PCD 120.6mm - 72mm from stud to stud

Commodore - 7/16" UNF studs - 5 Studs - PCD 120mm - 72mm from stud to stud

120mm = 4.724" (??)
120.6mm = 4.750" (4 3/4")


Baz.

Originally Posted by Redback

120mm = 4.724" (??)
120.6mm = 4.750" (4 3/4")

4 5/8" (0.015mm short of)