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Wheel Modifications

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WeeWilly View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote WeeWilly Quote  Post ReplyReply Direct Link To This Post Posted: 11 Jan. 2018 at 11:54am
I put a set of 600 X 16s on my 47 and have a couple thousand miles on them now and have had no trouble with them. The ones I received were 8 ply rating instead of the 6 ply that was in the add so mine is a little stiff. I would have liked to have 4 ply for these old bones but for the cost of them I am not going to complain, I don't even notice the logo on them.

   Jim
47 CJ2A (Ranch Hand) 48 CJ2A, 48 Willys truck, T3C 3782, M274 (Military Mule)
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Post Options Post Options   Thanks (0) Thanks(0)   Quote jpet Quote  Post ReplyReply Direct Link To This Post Posted: 11 Jan. 2018 at 12:04pm
Jim, would you say the rubber in the tread is softer?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote WeeWilly Quote  Post ReplyReply Direct Link To This Post Posted: 11 Jan. 2018 at 12:13pm
From a thumb nail test between the Speedway and a Goodyear that I have for a spare I would say the speedway is softer. Hope this helps a little and I enjoy watching you do the fine machine work Jeff.

   Jim
47 CJ2A (Ranch Hand) 48 CJ2A, 48 Willys truck, T3C 3782, M274 (Military Mule)
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Post Options Post Options   Thanks (0) Thanks(0)   Quote berettajeep Quote  Post ReplyReply Direct Link To This Post Posted: 11 Jan. 2018 at 4:05pm
Originally posted by jpet jpet wrote:










This reminds me of Sarge from the Pixar movie Cars.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Ol' Unreliable Quote  Post ReplyReply Direct Link To This Post Posted: 11 Jan. 2018 at 9:12pm
Tires that big do make Bam Bam look kinda... toylike.  I'd recommend you get an M-715 for the tires.  Smile
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Bruce W Quote  Post ReplyReply Direct Link To This Post Posted: 12 Jan. 2018 at 1:44am
That was kinda my first impression, too.LOL  
  BW
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Post Options Post Options   Thanks (0) Thanks(0)   Quote jpet Quote  Post ReplyReply Direct Link To This Post Posted: 12 Jan. 2018 at 8:43am
Bruce, I think you should move that rear axle back some. You will likely see better off-road performance with the longer wheelbase and better weight distribution. Front axle could go forward some too. HTH!

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Post Options Post Options   Thanks (0) Thanks(0)   Quote oldtime Quote  Post ReplyReply Direct Link To This Post Posted: 12 Jan. 2018 at 11:56am
Bruce, 
Do you wheel that on a regular basis ? Ha Ha Ha !

Hey Jeff...
I think you brought up a real good point the other day by showing us "too much tire" for the Jeep.
At some point these lightweight jeeps become truly disadvantaged by use of larger tires.
Whenever the tire gets too tall, too wide or too stiff the tread can no longer flex-form for full contact patch regardless of PSI.
7.50 x 16" at 32" diameter seems to be very near the limit for LRV size jeeps if you expect the tire to flex well at low PSI.
Obviously ply rating and compound density will effect the end results.

Concerning minimum PSI I expect pressures below 6 PSI will become problematic whenever tubes are installed. 
Any bead slippage will certainly destroy  tire tube at low PSI.

If I'm not mistaken your original quest was to control side roll at low PSI right ?
I believe that's referred  to as tire deflection.

Most all bias ply tires have a section width near 100% aspect ratio. 
So NDT's are all going to be very near to 100% aspect ratio.
Obviously a tire with lower aspect ratio should have less sidewall deflection.

It was determined years ago that the most practical section with is near the current 75% aspect ratio.
I believe that determination was about the time when the old school 78 series tires came to be.
Of course the original aspect ratio determinations were more about tire deflection during high speed cornering maneuvers.
Very few if any Jeeps are driven fast while cornering so we often opt for taller aspect ratios.
But still it holds true that a lower aspect ratio is key to preventing excess sidewall roll/ deflection at low tire PSI.
I would guess having the correct rim width to be a secondary concern toward preventing excess deflection.

So I don't think you'll get totally away from tire roll unless you somehow opt for tires having a lower aspect ratio.


Ken Bushdiecker
Currently rebuilding 1962 CJ-3B / Hurricane F-134 / T90C / 5.38 / Powr Lok Front and Rear / Deluxe Koenig Half cab
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Post Options Post Options   Thanks (0) Thanks(0)   Quote jpet Quote  Post ReplyReply Direct Link To This Post Posted: 12 Jan. 2018 at 12:33pm
Again, I have no plans to start running 900-16 NDTs. I just put these tires on to show myself and some others what 35" NDTs would look like. I also wanted some photos of it for another purpose. I will run 750-16 NDTS.

My 750-16 NDTs have a 6.2 wide tread and the recommended wheel width is 5.5' - 6.5' wide, i.e. 6". I'm not a tire expert, but it only makes sense that a 6" wide wheel/tire would have less side flex than a 5" wide wheel/tire simply by better weight displacement. Yes, lowering your aspect ratio would be more significant, but I still need ground clearance which is more important. I want to run the maximum tire diameter I can that still looks stock. That would be 750-16 NDT and 6" is the better wheel width.

We can crunch numbers to a point but I prefer the method of wheeling the tires and wheels to see what happens and make adjustments based on that.

Lee and I have had the conversation on whether or not 900-16 NDTs kick you out of the "Super Stock" class. My general rule of thumb applies to not only the tires but the entire jeep. If people ask you, "Is it stock?", you are still in the club. When they stop asking you, "What year is it?",... you have really crossed the line
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