Leeann
Maryland
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Joined: 08/22/2006
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I got lucky; all 6 of my rims are the same (actually, all 8 'cause we have 2 spares).
'73 Concord 20' Class A w/Dodge 440 - see profile for photo
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RvFNG76
Michigan
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Joined: 07/14/2017
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Ok thought i had a weird one or somebody made a big boo boo
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RvFNG76
Michigan
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https://www.extremecustoms.com/product.php?item_id=148185&c-vid=74767
Yes or no is it right or is it wrong???
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Griff in Fairbanks
AK
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Joined: 04/21/2005
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RvFNG76 wrote:I dont mean big little griff i mean i have dished rims in the back but more like regular van wheels in front. Look at my rig on my profile if at all possible zoom in on it and that will explain. I have a 97 f350 dually that all 6 rims match. Now when i do a google search for my rig or the incomplete chassis half it shows all the rims look the same.
Oh, sorry, I misunderstood.
What you have is not common but not uncommon either. Most manufacturers and owners try to make all wheels (tires and rims) match, primarily for aesthetic reasons.
It only becomes a problem in terms of the spatial relationship between the brakes and wheels. Typically not a problem with drum brakes but can be a problem with disc brakes.
Ideally, the rotors and calipers should be inside the rim, so braking force is linearly applied to the wheel, versus offset application. Motorhomes that use dual rims on the front have some kind of extender to maintain this relationship.
Using a regular rim on an disc brake axle designed for dual rims causes angular stress on the assembly.
Conversely, using a dual rim in the normal position on an axle designed for a regular rim often results in rotational and steering interference. The alternative is to invert the dual rim, again causing the tire to be offset from the brake rotor.
It'll work for short distances, like space-saver spares, but only for short distances and only until you can get to a repair shop.
(I have a picture that illustrates this but I haven't gotten my new computer to where I can upload it ... if someone really, really want to see the picture, I can rearrange my schedule to upload it.)
1970 Explorer Class A on a 1969 Dodge M300 chassis with 318 cu. in. (split year)
1972 Executive Class A on a Dodge M375 chassis with 413 cu. in.
1973 Explorer Class A on a Dodge RM350 (R4) chassis with 318 engine & tranny from 1970 Explorer Class A
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Griff in Fairbanks
AK
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RvFNG76 wrote:https://www.extremecustoms.com/product.php?item_id=148185&c-vid=74767
Yes or no is it right or is it wrong???
Assuming the picture is accurate, no.
The bolt holes aren't coined. So, it's either hub-centric, like Silverado rims, or requires precise machining for lug-centric mounting.
I've seen this or similar before and, due to the picture, haven't pursued it. If you're interested, please ask them specifically if the bolt holes are -- or can be -- coined. (I'd appreciate knowing their answer as you may have -- finally -- found a source for me ... assuming they offer a 17" version.)
(Don't let my wife know ... it'd mean a major expenditure she might not agree with.)
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Griff in Fairbanks
AK
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Two problems I ran into in my attempt to adapt 17" Silverado dual rims:
The hub holes in the rims are too small to fit over Dana 70 hubs. I (maybe) ruined one rim trying to enlarge the hole on a machine used for turning rotors and drums. (Long story involving shade-tree adapting and machining.) Another rim was machined accurately by a trusted machinist but is a tight fit. (A few thousandths larger would work nicely.)
The bolt holes are larger, making lug-centric mounting impossible as is. I've considered tubular shims to ensure accurate lug-centric alignment. There are larger bolts available but that would require reaming before pressing in the larger lug bolts.
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StingrayL82
Nampa, Idaho
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Joined: 06/27/2017
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Griff in Fairbanks wrote:Two problems I ran into in my attempt to adapt 17" Silverado dual rims:
The hub holes in the rims are too small to fit over Dana 70 hubs. I (maybe) ruined one rim trying to enlarge the hole on a machine used for turning rotors and drums. (Long story involving shade-tree adapting and machining.) Another rim was machined accurately by a trusted machinist but is a tight fit. (A few thousandths larger would work nicely.)
The bolt holes are larger, making lug-centric mounting impossible as is. I've considered tubular shims to ensure accurate lug-centric alignment. There are larger bolts available but that would require reaming before pressing in the larger lug bolts.
The other option, and I don't know if it would work, is to swap out the Dodge axle shafts for the GM axle shafts. Correct me if I'm wrong, which is quite possible, but didn't GM use Dana 70 axles as well?
Fred
Retired Army Guy
2005 Monaco LaPalma 37PST
Workhorse W24 chassis
8.1L Vortec
Allison 2100 MH
Onyx Color Scheme
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StingrayL82
Nampa, Idaho
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I found an issue with the dinette cushions, when I tried making it into a bed...there was a 3” gap in the middle, so the upholstery shop redid them for us; we got them back today and it’s perfect. The dinette pattern is now a negative of the sofa, and it adds color to the coach. The cushions are nice and tight together. The best part is that Brooke is happy, which means I’m happy.
![[image]](https://i.imgur.com/knCzA5Il.jpg)
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Griff in Fairbanks
AK
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StingrayL82 wrote:The other option, and I don't know if it would work, is to swap out the Dodge axle shafts for the GM axle shafts. Correct me if I'm wrong, which is quite possible, but didn't GM use Dana 70 axles as well? Purty much nope on swapping GM axles for Dana 70 axles, plus I love Dana 70 rear axles as manufactured.
It isn't just the 'heads' of the full-floating axle shafts. The outer part of the axle hubs are the same -- larger -- diameter. Likewise the splines and length of the axle shafts are (probably) different. ('Probably' different because I haven't actually checked but there a half dozen or so critical dimensions that have to match OEM axles.)
I'm not aware of any Dana 70 axles in GM light duty (1-ton and below) trucks from the factory. It's entirely possible ... and even likely ... GM used Dana 70 rear axles in their medium duty trucks. (I don't have any pictures of the Blue Beast -- a '65 1-1/2 ton GM stepvan I rescued from a junkyard. Otherwise, I could try to see what was under the back of truck.)
IIRC, GM 1-ton (and maybe some 3/4-ton) light duty trucks, had six tire mounting bolts per wheel.
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StingrayL82
Nampa, Idaho
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Griff in Fairbanks wrote:StingrayL82 wrote:The other option, and I don't know if it would work, is to swap out the Dodge axle shafts for the GM axle shafts. Correct me if I'm wrong, which is quite possible, but didn't GM use Dana 70 axles as well? Purty much nope on swapping GM axles for Dana 70 axles, plus I love Dana 70 rear axles as manufactured...
I must not have made myself clear. I didn’t mean to swap in a GM axle for the Dana 70, I meant find a GM Dana 70, take the axle shafts out of it and transplant them into the Dodge Dana 70. That way you can use the GM 8-bolt wheels, without having to machine them.
After researching, I confirmed that, yes, GM did use the Dana 70 in their trucks, so as long as you’re getting axle shafts with the same pinion spline (29, 32, or 35) and the correct offset (1/2”, 5/8” or 31/32”) as what you’re pulling out of the Dodge Dana 70, I see no reason why it wouldn’t work.
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