10 Lug Chevy 8.75" pattern tube type wheels


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By cowpunchmark - 3 Years Ago
I am trying to get a 1985 GMC C60 going and am wanting to go over to tubeless tires before spending a lot of money on the project.  It presently has 20" tube type wheels, so I am looking for 20.5" tubeless wheels.  My question is 'what all vehicles use that wheel?' so I can question the salvage yards intelligently. 
By Geoff Weeks - 3 Years Ago
You would be looking for a 22.5" not a 20.5", no such thing. I just checked Accurides wheel catalog and the only 10 bolt 8 3/4 bolt circle they now list is a 17.5" rim. They have discontinued a lot of rims over the last time I looked.
  Are you sure of you measurements?
  The 20" rims wouldn't be a deal killer for me, I am run 20" stud pilot right now. Hankook makes a good tire in the 10.00x R20 size that I am very happy with. AH-11 is the tire model. They require a rim of no less then 7" width, however, and sit best on a 7.5 or 8" rim. What width are the current rims?
 I would have thought by 1985 they would be the std 10 on 11.75 bolt circle with a 8.72 center hole?
 



By cowpunchmark - 3 Years Ago
Geoff

Thanks for the kind reply.  22.5", my mistake, I was pushing hard to find an answer several months ago and walked away as I was calling a lot but not getting anywhere.  I guess the main problem with the tube wheels is that they are 2 piece wheels and few people care to work on them.   I just didn't think finding a modern tubeless solution should be that difficult.

Incidentally, my wheel widths are 8.25"  I will post a photo soon, so everyone can see what I am looking at.
By Geoff Weeks - 3 Years Ago
Rim width is the measurement inside the rim flange. I highly doubt a tube type rim would be 8.25" unless it had special wide tires. Most hubs can not accept rims over 8" in tube type or 9" in tubeless unless they "super single" or wide based rims.
By Park Olson - 3 Years Ago
Are you confusing a lock ring wheel with a true "2 piece" wheel? 1985 is awful late for a 2 piece. Ford used some into the '70's, but no later , I think.
By cowpunchmark - 3 Years Ago
Having looked at the wheel again, it is stampted 'Firestone 20X6.5 XL DOT T'.  It is not easy to tell where the 6.5 comes from as the distance between the rims is about 8" which is how I was told to measure.  Incidentally, the tires are 9.00X20 tube tires.  I have to just go back with tube tires but that is not my preference, thanks to all for looking.
By cowpunchmark - 3 Years Ago
Are you confusing a lock ring wheel with a true "2 piece" wheel? 1985 is awful late for a 2 piece. Ford used some into the '70's, but no later , I think.

Thanks for the reply, I probably confuse easily.  The spare was I believe a true widowmaker.  The wheel cut neatly down the middle.  The wheels I am dealing with at this point have what is an appox. 1" band that holds everything together.

Still with the slot provided for the long valve stem amount probably many other reasons, it will not take a tubeless tire.
By Park Olson - 3 Years Ago
The "1 inch" band you describe is the lock ring,,, They will not take a tubeless tire, you must use a tube and a "flap" inside that covers the valve stem slot. The 6.5 you speak of is the width of the assembled rim where the tire bead seats, NOT the overall width of the rim, witch may vary slightly by different makers.
A C60 is akin to an F600 Ford and may have had an 20x8.25 tire originally on that 6.5 rim,, common on trucks of that size.
8.25's are still available, most, if not all, by off shore sources.
Hope this helps.
By wayne graham - 3 Years Ago
That rim will take a 7.50 x 20 or an 8.25 x 20. As was said 8.25's are available and probably made off shore. Hope this helps.
By cowpunchmark - 3 Years Ago
Thanks for all the help, however my goal is to go tubeless.  I would think that at some point the C60 went over to tubeless, hopefully with the same bolt pattern.  I know that until resently accuride made a 22.5 in that bolt pattern.  I would also like to know what all vehicles busses etc. would have had a tubeless tire in that pattern so as to better seach the salvage yards.  Barring that I can still get 9.00X20s.
By cowpunchmark - 3 Years Ago
Thanks for all the help, however my goal is to go tubeless.  I would think that at some point the C60 went over to tubeless, hopefully with the same bolt pattern.  I know that until resently accuride made a 22.5 in that bolt pattern.  I would also like to know what all vehicles busses etc. would have had a tubeless tire in that pattern so as to better seach the salvage yards.  Barring that I can still get 9.00X20s.
By Geoff Weeks - 3 Years Ago
Hankook makes a tire I am really happy with . The AH-11 is made in 9.00x20 and 10.00 x20 (both radial)  The 9.00 is designed for a 7" rim, 6.5 would be allowable but nothing narrower. I am running a set of 10.00 R 20's on the steer as we speak. I find them a good all position tire for on hiway work. The are not a mud tire. They are made in Korea I believe but are as good as any I have used. I am running them OTR so they get a lot  of miles put on them.

  Honestly, if your rims are in good shape, I wouldn't waste my time looking for odd ball tubeless rims.

  Either find a shop that knows how to do tube type correctly, or have someone teach you. They are easy to change, and while ALL truck tires (tube and tubeless) store enough energy to kill you if mis handled, tube types are safe.
   If you want a good idea on the stored energy contained in a truck tire, inflate one from zero psi to 110 psi with a bicycle pump, you'll see how much energy it takes in a hurry!
By Geoff Weeks - 3 Years Ago
BTW the only ones I know were some trailer axles were using 10 on 8.75 circle. IHC, Ford , and GM all used 6 on 8.75 t bolt circle but back in the days when tube type were common. I believe the military trailers also use it,( six bolt) but again  tube type.

    You are measuring the bolt circle and not the center hole? 10 bolt with a 8.75 center hole is common as dirt.
By cowpunchmark - 3 Years Ago
You are measuring the bolt circle and not the center hole? 10 bolt with a 8.75 center hole is common as dirt.


No, it is a true 8.75" chevy pattern, the hub guide is 6.25" and not 8.75.  Attached are pics of the wheels.  Assuming I have to use these wheels.  How do I get them disassembled?




http://forums.justoldtrucks.com/uploads/images/22b85bd4-b241-40c8-983f-eade.jpghttp://forums.justoldtrucks.com/uploads/images/9d2ddd13-ba03-4d6e-bb97-4e67.jpg
By wayne graham - 3 Years Ago
I don't want to try and explain and get you in trouble. Have a tire shop dismount one for you and watch how he does it. Then if you have the tools you can decide if you want to do them your self. Mounting the new tire has to be done properly or one can be seriously injured or worse. Those will probably mount up fine but lock ring grooves have to be clean of rust, dirt etc. Best case is to blast and paint the rims and have a tire shop mount them. Just my thoughts.
By cowpunchmark - 3 Years Ago
No I do not think so, it is one complete ring
By Geoff Weeks - 3 Years Ago
Ahh, hub pilot "motor wheels". The y are not "Budds" or stud pilot. I don't know of anyone making those any more.
By wayne graham - 3 Years Ago
Geoff Weeks (5/21/2016)
Ahh, hub pilot "motor wheels". The y are not "Budds" or stud pilot. I don't know of anyone making those any more.

Geoff, Now that I think about it I think I was told that tire shops really don't want to deal with them.
By hayseed - 3 Years Ago
Tony Bullard (5/21/2016)
Is this a split in the ring?


If not they may be like these

http://forums.justoldtrucks.com/91072/Are-these-Clincher-RimsTwo-Piece-Rims-If-so-how-do-you-remove-them-safely-and-replace-them




I'm guessing that's where a balance weight has been mounted.....BISTBC
By Junkmandan - 3 Years Ago
The lock ring has 2 slots ,or cut out areas to make 'em removable from the rim.   The machined slots make it very similar to the 2 piece rim that's split between the beads circumferiencly.
By cowpunchmark - 3 Years Ago
Can anyone direct me to a photo of my type of wheel disassebled?  That way I can figure out how to break it down.  Mine is a complete ring with no splits.
By Geoff Weeks - 3 Years Ago
The rims in that picture are tubetype, easyer to tell on the rear than the front, but they are tubetype all the way around.
By rubbishman - 3 Years Ago
From what I have read and seen some of the wheels, the acual disc, were made by one company, i.e. Motor Wheel and the rims could be by Budd. My truck has a mix of Budd, Firestone Badyear and M.W., note the photos.http://forums.justoldtrucks.com/uploads/images/11d42b9a-3e65-45a9-838a-381f.jpghttp://forums.justoldtrucks.com/uploads/images/705b53b3-6034-4728-9962-019b.jpghttp://forums.justoldtrucks.com/uploads/images/07b754a9-a570-4fe8-bc39-5bd4.jpghttp://forums.justoldtrucks.com/uploads/images/44062d70-7400-4e2c-adc9-3af1.jpg
By rubbishman - 3 Years Ago
http://forums.justoldtrucks.com/uploads/images/98776a5c-216e-43cc-8766-8148.jpghttp://forums.justoldtrucks.com/uploads/images/37c3a82a-5f44-4ab8-a264-dd87.jpghttp://forums.justoldtrucks.com/uploads/images/47717193-3391-4376-a472-42e8.jpghttp://forums.justoldtrucks.com/uploads/images/2f015bca-669e-4c32-aa20-44aa.jpghttp://forums.justoldtrucks.com/uploads/images/f508a3b7-85c2-4d60-bf59-b8b2.jpghttp://forums.justoldtrucks.com/uploads/images/dbf071bc-0352-4500-8963-f28d.jpghttp://forums.justoldtrucks.com/uploads/images/c3d2584d-3b94-4411-9cab-82ef.jpghttp://forums.justoldtrucks.com/uploads/images/ae014b0a-074a-4db7-b00c-d84c.jpg
By rubbishman - 3 Years Ago
Ball piloted, yes. I was showing the different disc designs and that they have two different manufacturer names on the same wheel.
By 68c40 pizzatruck - 6 Months Ago


Hey guys came across this site in my search for a replacement for these wheels or some used ones I need 2 of them to replace the widow makers on the front.
They are 20" 10 lug on 8.75 from the 1968 Chevy C40 1.5 ton
I have been going crazy trying to chase parts for this thing. Right now my need is wheels.
Any help will be greatly appreciated.
I have a thread going on stove bold.com and followed all the leads but have come up with nothing. I'm doing all the work myself on this build and don't have a million dollar budget but I'm not looking to cheap out either.
Thanks again
Jeff

Forgot to add I'm in Bakersfield, CA
By Aaron - 6 Months Ago
The front doesn't use all 10 studs on those does it, if it does and you've looked all over already you may have to have those centers taken out and put into a tubeless or lock ring wheel, i don't know if Stockton wheel is still in business but they used to do that type of work.
By Tony Bullard - 3 Years Ago
Is this a split in the ring?