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modirt 
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 Topic: Replacement Truck Rims?
Posted: 20 Jul 2019 at 3:58pm |
Working on rehabbing a goofy gadget that has the old Firestone RH5 two piece rims......aka, the Widow Makers. Confirmed by the stamped plate on the rims. Rims will be scrapped when suitable replacements are found.
Tire size is 7.5 x 20 in a 6 hole bolt pattern. Duel rears, so need 4 of them.
Anybody have or know where I can get a set of rims to fit? Basically something that might fit a Chevy C60, 65, etc. Truck salvage yards in the midwest? Junk yards in midwest? I'm in central MO.
I can post or send pictures if it would help narrow down the search.
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DiyDave
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Posted: 20 Jul 2019 at 6:03pm |
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Generally later model truck or school bus rims should be made in the same bolt pattern...
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Coke-in-MN
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Posted: 21 Jul 2019 at 11:14am |
Look for a 2 or 3 piece lock ring for 20" or 22" but you can get tubless rims also to fit bolt pattern as 22.5 tires are more common now 
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Faith isn't a jump in the dark. It is a walk in the light. Faith is not guessing; it is knowing something.
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DMiller
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Posted: 21 Jul 2019 at 2:53pm |
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What is the circle size on the six? There are 19.5x6 wheels at 8.75 diameter lug pattern available commercially. Hate to say it but Isuzu is about the only medium truck using Six lug now.
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LeonR2013
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Posted: 21 Jul 2019 at 3:26pm |
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Go to a place where they are junking old school buses as suggested. Don't know off hand where that may be. I think you can get them in a 9R22.5 or even a 10R22.5 and get them in the right height. Leon
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modirt
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Posted: 21 Jul 2019 at 5:54pm |
 DMiller wrote:
What is the circle size on the six? There are 19.5x6 wheels at 8.75 diameter lug pattern available commercially. Hate to say it but Isuzu is about the only medium truck using Six lug now. |
I measured and it looked to me like the 6 hole bolt pattern was 8.5 inches.
I've been told rims off a Dodge D600 or maybe 500 would fit. Possibly some Ford trucks. And maybe school buses. Now that I think of it, I know where there is at least one salvage yard that has about 10 buses that have been parked for some time, and he may also have the old Dodge trucks on some other truck with matching rim pattern. If not, he may even have a complete axle assembly off a wrecked salvage truck.
Diameter of existing tires is about 35 1/2 to 36 inches. Trying to keep the same diameter if possible.
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steve(ill)
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Posted: 21 Jul 2019 at 6:21pm |
X 8.75 Bolt Pattern Measurement and Specifications The 6 X 8.75 Bolt Pattern or Pitch Circle Diameter (PCD) is made up of the stud count (6) and the bolt circle measurement (8.75), the notional circle determined by the center position of the studs.
How To Measure 6 Lug Bolt Patterns Measure 6 lug wheel bolt patterns from center to center distance between two studs that are across the hub from each other. This measurement is your bolt pattern diameter. Learn more about wheel dimensions.
The 6 X 8.75 bolt pattern is common to OSHKOSH, SPARTAN, JOHN DEERE, INTERNATIONAL, DODGE, OSHKOSH and SPARTAN (6 HAND HOLE) vehicles.
Edited by steve(ill) - 21 Jul 2019 at 6:23pm
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Like them all, but love the "B"s.
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modirt
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Posted: 21 Jul 2019 at 8:35pm |
I suppose it could be 8.75". Hard to say as the tires are mounted, to the hub is in the way of an exact measurement.
Can these hole patterns be determined from the axle? This one is a Rockwell F106.......have a picture of the ID plate if that would help.
Does anyone have a way to track down the specs of the axle from the ID plate?
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steve(ill)
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Posted: 21 Jul 2019 at 9:17pm |
F106 is a good number from the 1970s
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Like them all, but love the "B"s.
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steve(ill)
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Posted: 21 Jul 2019 at 9:28pm |
Rockwell axles could be purchased with WEBB hubs/ wheel end
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Like them all, but love the "B"s.
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Coke-in-MN
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Posted: 21 Jul 2019 at 10:36pm |
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center to center distance - can also be measured from outside of one stud to inside of stud directly opposite - 180 deg - so can be while mounted - use a divider to clear axle end .
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Faith isn't a jump in the dark. It is a walk in the light. Faith is not guessing; it is knowing something.
"Challenges are what make life interesting; overcoming them is what makes life meaningful."
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modirt
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Posted: 22 Jul 2019 at 6:55am |
BTW, this is the ID tag on the axle. Anybody know how to decode it?
I have spent hours searching, but not much info on them. Steve has provided more information on them in this single thread than the entire Internet can offer (at least using my search engines).
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modirt
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Posted: 22 Jul 2019 at 6:59am |
I should also mention that while I have driven stuff with axles like this for well over 50 years, I've never touched one with a wrench. Worked in the shop at a school bus barn one summer, and changed some tires, but that was 40 years ago.....and no deeper than changing the tires.
So I'm having to get up to speed on how all this fits together......and doing it in a hurry.
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Coke-in-MN
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Posted: 22 Jul 2019 at 7:22am |
6.8 X 1 raito -- rest is build info - seems it's a heavy axle for load rating . Same axle could be used with many different brakes or wheel hubs . Also could be the rear section of a tandem axle in some instances . Start on page 10 of PDF file to decode the tag . http://www.truckpartsetc.com/sales/PDFs/Leland/Leland_AxleID_006-011.pdf
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Faith isn't a jump in the dark. It is a walk in the light. Faith is not guessing; it is knowing something.
"Challenges are what make life interesting; overcoming them is what makes life meaningful."
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shameless dude
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Posted: 22 Jul 2019 at 7:51am |
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local tire store may have the rims you need, and if not...they could prolly tell you where to get some. I ordered new ones from a local auto parts store for my 1 ton.
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jaybmiller
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Posted: 22 Jul 2019 at 8:34am |
yeesh 6.8 to 1 ! My Willys 4WD PU had 4.88s in it, not too good on gas.. With 6.8s you'd need to always see a gas station nearby
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Coke-in-MN
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Posted: 22 Jul 2019 at 9:11am |
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Big difference when your dealing with 20" tires from a Jeep
My White Super Mustang with a 6-200A engine 5 x 4 OD transmission had 6:33 rear tandems - 34,000 SLHP rear and ran 9.00 x 20 tires - I went to 10.00 X 20 rears and 13.80R20 fronts to get GVW up to 51,000 - can carry 16.5 tons in box and scale it
my GMC has 7:54 rear tandems 427 engine - RT613 trany and in order to get any speed you need to wind that V8 over 4,500 RPM , and only haul 14.5 tons - same tire sizes as White which turns under 3,200 RPM
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Faith isn't a jump in the dark. It is a walk in the light. Faith is not guessing; it is knowing something.
"Challenges are what make life interesting; overcoming them is what makes life meaningful."
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truckerfarmer
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Posted: 22 Jul 2019 at 10:21pm |
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My 87 GMC C7000 has 6.10 to 1 ratio rearend with 20" tires and a 5 speed tranny. Humms Dow the road nicely at 60 mph. 4.10 ratio rearends used to be pretty common in over the road trucks. Overdrive Granny's make up for the low gears.
I'm in the process of switching my truck from 20" tires to 22.5" tires. I'm fortunate enough to have 10 bolt rims though. Low pro 22.5"s are almost the same height as 9.00 20s. New steel rims cost me about $90 each.
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Michael V (NM)
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Posted: 22 Jul 2019 at 11:44pm |
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Now if I could find some for my Studebaker.....it's got them widomakers on it,, but their like a 5 on on 7 1/2",(I'm not sure on the exact measurement) and are the 'hub pilot' not the 2 nut 'budd' type,, there out there,jus kinda like finding hens teeth tho..
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DonBC
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Posted: 23 Jul 2019 at 5:52pm |
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Most truck manufacturers did not make their own axles. They would be supplied by a third party supplier. The vehicle manufacturer might have called for special specifications but usually you could find the same axle say, under a Ford as under a Dodge of the same year. The same would happen with manual transmissions.
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DMiller
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Posted: 24 Jul 2019 at 6:27am |
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Appears as a Ford P/N on that F106 housing, if anything time to buy Dayton Spoke hubs and convert to common 22.5 Wedge wheels as most old trucks were. Bearings were common to all, either Ford or GMC or IHC just different wheel ends difference in seals.
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modirt
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Posted: 24 Jul 2019 at 3:46pm |
DMiller wrote:
Appears as a Ford P/N on that F106 housing, if anything time to buy Dayton Spoke hubs and convert to common 22.5 Wedge wheels as most old trucks were. Bearings were common to all, either Ford or GMC or IHC just different wheel ends difference in seals. |
My hope was to find some direct replacement rims, hopefully with decent tires already mounted, that I could use as a direct replacement and just swap em out. Just started this quest, so they may turn up eventually. Good news is the ones on there now are still holding air, so have some time.....but sometime before next summer at the latest.
Lacking that, it looks like I've got options.....from swapping hubs, all the way up to a different axle, with rims and tires already in place.
BTW, have not mentioned this yet, but this axle has brake drums.....and not too sure what condition the pads are in. Have heard those are getting harder to find. Could be I wind up with a different axle, modern tires and disk brakes?
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Michael V (NM)
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Posted: 24 Jul 2019 at 11:01pm |
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A good tire shop should be able to get you new rims,, in 20" with just a split ring, or tubeless 22.5,,or maybe even 24.5,,
I would go with tubeless 22.5's that match the size you have now
There should be no need to go to the trouble of swapping hubs, brakes an all that...
BTW, what kind rims are on the steer-front axle?
Edited by Michael V (NM) - 24 Jul 2019 at 11:04pm
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modirt
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Posted: 25 Jul 2019 at 12:54pm |
These are the fronts. As near as I can tell, a form of solid rim with modern tubeless tires, which look like they got some life left in them, if they winter indoors.....as they will be doing under my stewardship.
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modirt
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Posted: 25 Jul 2019 at 12:56pm |
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modirt
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Posted: 25 Jul 2019 at 1:08pm |
So to confirm.....these are 6 lugs and do have the 8.75 bolt pattern.
If I understand correctly, these are hub pilot rims........not sure if this particular two nut system is common......so challenge when looking for a replacement is to find modern rims to fit these studs.....
Semi-unrelated to this thread......I also need to replace the master brake cylinder......and thus the need to open the bleeder valves. Happy to report that after numerous soakings with PB Blaster, and later Free All, all four bleeders gave it up without incident.
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steve(ill)
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Posted: 25 Jul 2019 at 1:33pm |
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Modirt, don't know if you have every had a 1 ton axle ( or above) apart before... the "TWO SETS OF BOLTS" is common for any larger truck.. On a car or half ton truck, you pull the alxe half shaft with the flange and studs and outboard bearing ( or race) all in one piece.. On a BIG truck the alxe is not loaded with the outboard bearing... You pull the center ring of bolts which disconnects the axle half shaft from the hub / wheel... you can pull that small flange with the axle shaft on it out of the housing... Wheel / tire/ mounting bolts all stay in place on the axle housing.. You don't need to mess with the INNER ring of bolts, just the 6 OUTER bolts on 8.75 inch circle.
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Like them all, but love the "B"s.
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steve(ill)
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Posted: 25 Jul 2019 at 1:39pm |
here is a little movie of the axle half shaft drive... some variations, but all 1 tons ( some 3/4) and above are similar.
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Like them all, but love the "B"s.
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SteveM C/IL
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Posted: 25 Jul 2019 at 1:40pm |
Eewh! Those are ball and seat,not hub pilot. The hex nut is the outer nut and the square head is the inner nut. Both seat into a taper. Remove outer first,then outer wheel. Remove inner off it's stud and remove inner wheel. Sometimes the inner wants to turn with the outer....not fun. Your life would be better if you could get hubs /wheels that are pilot hub and one nut holds both wheels. Mid 60's Chevy 2 ton used that type.
Edited by SteveM C/IL - 25 Jul 2019 at 1:43pm
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DMiller
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Posted: 25 Jul 2019 at 1:40pm |
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Is a ton and half or two ton axle. IF the removal of the outer nut backs off the inner then take the rest outers off, there is a tool to hold the outer nut and drive the inner thru the outer. Typical Budd Wheel nuts Righty Tighty Lefty Tighty on these, Left Side should be marked L on the head of the inner nut. 8.75 is a real common pattern six lug.
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