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For some reason I'm thinking it's the small Chevy pattern (5x4.75). I can't remember for sure. It should be listed in this thread: https://www.ford-trucks.com/forums/s...ght=jaguar+ifs Lots of good reading there anyway. Hope this helps.
I checked this recently as I'm going to use a Jag myself, as soon as I find one. The bolt pattern is 5x120mm, which works out to 5x4.72. Close enough. I did read that the hub, and wheel pilot hole, are larger than stock chevy. Most custom wheels, however, have a large pilot hole to make fitment universal. You could buy/make hubcentric rings to take up the gap. Or say the heck with it, it's a truck.
After doing some googling, I found that the Jaguar hub is set up for using hubcentric wheels, meaning that the center hole of the wheel keeps the wheel in the exact location needed on the hub. Most wheels I'm used to are lug-centric. Does anyone make adapters or spacer rings to go from a hub centric hub to lug centric wheel? All I can find is the other way around.
I know this is a small detail, but sometimes it's the details that'll kill you. Maybe I'm just better off sticking with the 5.5" bolt pattern and a straight axle...
I am using a Jag rear end on my 56 effie. When I got my truck it had wheel adaptors and had Chevy Ralliegh wheels fitted to a standard 9". I am still using the chevy wheels to roll the chassis around on the Jag rear end, but can definately confirm that the center hubs on the Jag are slightly larger. The Rallieghs wont actually fit flush to the hub.
I cant say for sure, as I am not in the wheel business, but from what I have seen of the different types, it comes down to the Lug nuts used. Hub centered tend to use flat faced nuts/bolts and use the hub to locate, where as nut centered have a chamfered face to the holes. I think most aftermarket wheels tend to use the chamfered nuts.
Depending on what wheels you want, I would suggest you check that the center hole is large enough to clear the hub, as stated earlier, some aftermarket wheels tend to be anyway and use the chamfered nuts but I would always check before partuing with any of your hard earned.
Just checked an American Racing spec sheet, typical center bore on a 5/4.75 aluminum wheel is 3.27 inches, with a small chamfer. What is the diameter of the hub?