Anybody have an idea if a 75 F250 8 on 6.5 " wheel pattern can be changed to 8 on 170 mm, rear ??
Thanks.

 

you would need either axleshafts (available from the aftermarket) or an entire axle from a newer truck.

I assume you bought rims for the newer pattern?

 

Axle shafts in full floater axles dont have wheel studs on them, they are seperate than the hub. The hub has the wheel studs attached.

8x170mm is sooo very close to 8x6.5 but does not quite work. If you are using later model wheels on an early truck, there are a few ways to make them work. one is to simply have the wheel re-drilled and then use some steel inserts for the holes. Desert and circle track guys do this quite often.
The other option is to weld and re-drill the appropriate metric pattern for your wheels. Guys machine hubs to accept 6 and 5 lugs so this cant be all that bad. Not too sure what you might do for the drum / disc, but this is an option.
Unfortunatley the wheel is a hub centric wheel and the hub islug centric so watch the capacities as they will be less than you may expect.

 

75 f250's have full float dana 60's in rear?? 30 spline shafts? I have seen that some 60;s have c clips.
Thanks.

 

Some semi float axles are out there, and this is possible, but I only knkow those to be in some vans and later model trucks.
All of the 75's I have owned have all been full floaters.
Even if you had a semi floater, the same rules apply. You will have to re-drill the axle flange to obtain the lug pattern you desire.

What are you trying to accomplish? Im curious.

 

well i have a set of kmc enduro beadlocks in 5 on 5 1/2 and 8 on 170 for my 75 f250 but obviosly they dont fit. There is not that many 8 0n 6.5 rims out there, especially in 17 inch. I would like to keep the dana 60 but need to figure if this project is worth it or do i need to convert to a 9 inch. Re drilling the flanges take away any strenght and is it expensive?? What about changing the hub to a 5 on 5 1/2, anybody sell parts do accomplish?? Thanks.
rob

 

Sure thats a possibility. Many Jeep guys change and machine dana hubs to accomodate both 5 and 6 lug patterns. Thats one option, but I am still sort of confused.
You have two sets of beadlocks? One set is 5 lug and one set is metric? Both of these are 17" diameters?
Are you stuck on 17" wheels?
If you use the metric pattern what are you going to do with the front?

 

well truck is going to be an old scool prerunner and all my tires are 17 inch bfg projects. I also need to run 17 inch rims to clear bigger brake calipers. As far as front yes I will need to takle that as well but cone ind as well as other co make front hubs for 1 inck king pin spindles. Oh its 2wd, did not mention that. I am trying to change rear bolt pattern in the most economical way.

 

I, diggin it. Makes a little more sense.
I did not know they made an 8 lug wheel. Thought they were all 5 lug. Only recently did they offer some others huh? I recal the big 5 race pattern. 5 on 205mm right? Im no desert guy, but I do know that desert guys modify wheels all of the time. The 6061 T6 aluminum should take some machining and a steei insert with little problem.
If you want to run the 8X6.5 pattern I would bring some love to the wheels and make the wheel fit the hub. This will make your job a little easier on the front. Only problem is that you may have some one off wheels.
Since you already have the wheels, I guess running the larger wheel pattern and cutome hubs is not an option any longer is it?

Lets see if I can get a buddy of mine to help out here, so that you dont have to take advice from a mud guy.........Phone ringing.

 

Buddy and I had a long chat about hub options and your front lug pattern dilema. Guess the 1 inch F350 king pin is not all that uncommon and there are some options.
Gonna take some discussion and he is in the shop doing some work for the night. He is aware of the questions asked and will try to contribute some time in the morning.
Pretty sure he can bring something to the party.

 

mm to inch 170x .03937 = or easier way 170x.04=6.80

 

So - did you finally actually BUY a truck Rob????

When Ed called me last night I had no idea this was you with the questions. I was wondering what was going on but figured it was the usual BS (guy with 170mm wheels wanting to put them on one of these old trucks).

I would probably go with the 9" and a 5x5.5 lug pattern. Actually - I take that back...
Let me 1st ask this question: What lug pattern is the race truck? If is is 5x5.5 which I think it is - then I would for sure go 5x5.5 on the "prerunner". I would assume the "prerunner" will also see some chase truck duties and will go to the races as well. You never know when the race truck will need an extra spare and if you can pull one off the prerunner or chase truck...

That being said you'd go to a "standard" 9" rear end type setup and convert the front to 5 lug. Now I know you will say "this is where the hard part is" but it is really not...
There are quite a few ways around this. Many of them depend on whether or not you will be converting the truck to front steer or leaving it rear steer.

If staying rear steer: You can use the Cone or Autofab hubs (both made by cone, but the autofab ones are cast and a bit cheaper) that fit on F-350 spindles and have 5x5.5 lug pattern.

If converting to rear steer: Use the spindles off a 80/81 F-150. These are an odd anomoly of a truck and have a 1" kingpin with a 5x5.5 lug pattern AND front steer!


I could go on for days about this and ways to achieve what you want, but we are getting away from the original topic.

Here is some reading on the subject for you. It starts off about using d44 beam ends vs. kingpins, but it covers many options on going 5x5.5 lug pattern with 1" kingpins.
http://www.dezertrangers.com/vb/showthread.php?t=97394

If you want to go with the 8 lug then Ed already gave you the best advice... take them to a competent wheel shop and have them drilled and sleeved to be 8x6.5 lug pattern.

 

do u have a rough idea of cost to change rear dana 60 to 5 on 5 1/2? Not sure if i am following here but 8 on 6.5 pattern laid out would obviously make a larger diameter than a smaller 5 on 5 1/2 pattern. That said you would need to make the hub smaller on the end of the 60 to accomplish 5 on 5 1/2? Am I making sense?? So in order to accomplishthis u have to cut off the factory dana 60 8 on 6.5 and add all new 5 on 5 1/2 hubs, if anybody makes them?
Thanks.

 

Also f250 will be an old school prerunner, rear steer, etc? Have soome 1 " beams out of a 68 f350 that will be added.

 

OK then - easiest answer and solution.

Run the F-350 beams which are 8 lug. Keep the d60 rear as 8 lug. Machine your 8 lug 8x170mm wheels to be sleeved for 8x6.5" lug pattern.

Done.

Also - check your other thread. I need a truck near Vegas to make some 5" per side flare fiberglass for. You help me with a truck to use/borrow and you get a deal on glass...