|
|
 Posted 3/17/2008 8:24:47 AM |
|
|
Getting Better at Internets
Last Login: 11/13/2022 6:06:37 AM
Posts: 2,698,
Visits: 8,392
|
|
| Hey Conrad, I too am a full GM person, BUT one thing i have learned from working on cars is that the axles do differ from one truck to the next (and by that i mean 1/2 ton, 3/4 ton truck, etc) My wife's '63 would be a prime example, we had a 12 bolt, 3/4 ton axle come under the truck with a 6 lug large bolt patturn and we had plans to drop it down to a 5 lug all the way around when we completed the truck, but still keep it 12 lug. Well we took the axle apart and found that a 12 bolt 3/4 ton axle is larger than a 1/2 ton 5 lug 10 bolt axle, and they will not interchange. So im still trying to decide what i want to do for that problem. Another problem i ran into with another project -my 72 Camaro- is that i had plans to narrow the axle about 2 inches on either side, to allow larger tires (but not pro-street size, ya know?) But i found that the reason why so many people narrow ford axles, and not chevy axles is because that a ford axle stays the same size the length of the axle, and chevy axles taper as it goes from the wheel to the differential. Just a lil food for thought. Hope this information helps  .
“It’s not who I am underneath, but what I do that defines me”
|
|
|
|
| Posted 3/17/2008 10:24:00 AM |
|
|
Forum Guru
 
Last Login: 1/3/2016 3:34:07 PM
Posts: 863,
Visits: 1,397
|
|
always always helpful when I hear things from Experience. Thank you. It sounds like Chevy has more options. What till matter is nailing the rear width down with everything from axle to wheels. I am getting jittery waiting to order these tires...note to self: patience grasshopper.
...does it come in black?
 
|
|
|
|
| Posted 3/17/2008 10:59:45 AM |
|
|
Forum Guru
Last Login: 1/3/2016 3:34:07 PM
Posts: 863,
Visits: 1,397
|
|
| Dave, I do hear what your saying. I'll ask more when I have everything. now, not that this is the exact rim I'm lookinf to get (would be nice) but here's an example 
This one's like $160 bucks. Not bad, but still will shop around for used ones...some dude in milwaukee has 4 rims of that size on worn tires for $425. I just gotta keep looking around.
...does it come in black?
|
|
|
|
| Posted 3/17/2008 12:51:36 PM |
|
|
Has NO LIFE!!
Last Login: 12/26/2023 1:14:45 PM
Posts: 5,397,
Visits: 4,909
|
|
| Hey Conrad I have to apologize I guess I'm not being clear in what you need the mock-up rim for. Just loooking at a tire laying on the ground its hard to tell what the buldge width is going to be when its mounted and fully inflated. A 16.5x12 inch rim is going to actually measure 13" wide because the width of the rim is measured from the bead channels inside the rim. You need a junk rim. A $25 piece of junk rim that is still 16.5x12. Have your tire that you are going to use mounted and aired up then......measure the width at the farthest point of the tire...the buldge.....We cannot use my number because my tire is 44" tall. It will be different than your 39" tall tire. Once you have that measurement your done with the rim. If you could borrow a rim from the tire store that would be better, but I have found 16.5x12 rims are not super common. Using a 10" wide rim will not be good it should be the same width as the rims your going to use on the car. Let's say for the sake of discussion your buldge width is 16 inches. Hypothetical...With two tires and a one inch gap between them you have 33" total for each duallie side. For an overall width of 102 inches the distance between the duallies would be 36". The duallie buldge width at 33" for each side equals 66 plus 36 inch between the duallie equals 102" max. You can't go over this number and be street legal. Ok here is where it gets complicated. In our hypothetic model you have a 13' wide measurement across a 16.5 x 12 rim. Your buldge is 16 inches giving us a 1 1/2" on each side of the rim. We need a 1 inch gap between the tires so each rim makes up 1/2". Two rims with a 1/2 makes up one inch gap between the tires. Summation.....We measure from the face of the rim{outside}. We have a 13" rim plus 1 1/2" buldge{1/2 of the 3"} plus 1/2" for the spacing{ 1/2 of the 1" gap between tires for a total...15 inch negative offset.... Now for the width of your axle we take the 15 inches of negative offset on the rim and add 1 1/2 inch for the outside buldge{the 15 inch was to the face of the rim} So 16 1/2 inches wide times both outside tires equals 33 inches minus 102" (maximum outside width} leaves 69" AS THE MAXIMUM WIDTH OF YOUR AXLE HUB TO HUB....... If you find out the buldge width of your mounted and aired up tire I will help you determine the negative offset for your fabricated rim. The rims your showing will probably not work. Be careful of guys saying oh just put longer lug bolts and a spacer. That is not safe.... Again this is just my humble suggestion. Hope it helps...BWD
|
|
|
|
| Posted 3/17/2008 12:57:02 PM |
|
|
Has NO LIFE!!
Last Login: 12/26/2023 1:14:45 PM
Posts: 5,397,
Visits: 4,909
|
|
| Oh Conrad I was reading the specs on the wheel you like. I noticed it has a negative 4.4 inch offset......And there in lies the problem...And may the force be with you Obiyan Kanobi.....BWD I'd love to be there when you ask for a negative 15 inch offset. They are going to say they don't make them......
|
|
|
|
| Posted 3/17/2008 1:10:29 PM |
|
|
Forum Member
Last Login: 8/14/2021 5:54:38 AM
Posts: 496,
Visits: 2,058
|
|
|
|
|
| Posted 3/17/2008 1:22:20 PM |
|
|
Getting Better at Internets
Last Login: 11/13/2022 6:06:37 AM
Posts: 2,698,
Visits: 8,392
|
|
THAT made my head spin  I'm thinking the wheels that BWD is talking about look somewhat like this, mount two together, back to back, (or front to back i should say) and with tires mounted, should give you whatcha need. If these two cents were wrong, i apologize  . http://www.autoamenity.com/images/SimulatorDOT2.jpg
“It’s not who I am underneath, but what I do that defines me”
|
|
|
|
| Posted 3/17/2008 1:53:09 PM |
|
|
Forum Guru
Last Login: 1/3/2016 3:34:07 PM
Posts: 863,
Visits: 1,397
|
|
OK. I've read Dave's words slowly.
As I read it, I picture everything in my head. Believe it or not after the 2nd time reading this, I understand it. Mainly because it was explained beautifully. Dave, I do understand that the rim i'm mocking is for just that. I'm certainly not wanting to pay for something I'm going to use for only a day. The MT wheel i pictured was just an example of the size and not the offset. I realize this ISN't going to do at all...just the 16.5x12 size is what i wanted to show...and you're right about that there just aren't alot of these around. I DO plan on checking salvage yards while I wait for the tires.
Dave is awesome. I almost feel guilty for you taking the time to be so detailed. I don't want to cut into some guy's time of getting an amazing pool designed by you. I truly truly appreciate the help. I will incorporate these figures into the computer model, knowing full well it may change when i get the rims.
PS>>>In our hypothetic model you have a 13' wide measurement across a 16.5 x 12 rim.
i think here you meant 33" wide...right?
Bean thank you too man! I actually have seen this explanation of offsets. Thanks!
Shagg...your input is always welcome. thank you too!
...does it come in black?
|
|
|
|
| Posted 3/17/2008 3:25:33 PM |
|
|
Getting Better at Internets
Last Login: 11/13/2022 6:06:37 AM
Posts: 2,698,
Visits: 8,392
|
|
Malfunction....need input Stephanie....iiiinnnpppuutt 
“It’s not who I am underneath, but what I do that defines me”
|
|
|
|
| Posted 3/17/2008 4:33:56 PM |
|
|
Forum Member
Last Login: 8/14/2021 5:54:38 AM
Posts: 496,
Visits: 2,058
|
|
Conrad (3/17/2008)PS>>> In our hypothetic model you have a 13' wide measurement across a 16.5 x 12 rim. i think here you meant 33" wide...right? think he meant 13" is the overall width of a 12" wide rim. The rim width is the measure from the inside of the lips where the tire sets.
"there ain't no bat!"
|
|
|
|