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Topic Review (Newest First)
07-15-2019 07:35 PM
JNHEscher
Quote:
Originally Posted by [486
;44521972]
Quote:
Originally Posted by JNHEscher View Post
Whatcha running? I have to check the speed rating too.
speed rating is relative on tires
it all comes down to heat from friction between the plies

less pressure, more heat
more load, more heat
more speed, more heat

so, if you are running at a fraction of their load rating of 10k apiece (at 55) you should be fine with running them 75 all day provided proper inflation pressure
I don't wanna count on being nice to our tires. Lots of load expected, bit of a lead foot. Pressure will be well monitored at all times.
07-15-2019 06:30 PM
[486]
Quote:
Originally Posted by JNHEscher View Post
Whatcha running? I have to check the speed rating too.
speed rating is relative on tires
it all comes down to heat from friction between the plies

less pressure, more heat
more load, more heat
more speed, more heat

so, if you are running at a fraction of their load rating of 10k apiece (at 55) you should be fine with running them 75 all day provided proper inflation pressure
07-15-2019 02:58 PM
JNHEscher
Quote:
Originally Posted by bdkw1 View Post
But, but, those aren't super singles!

Although, I could get by with a single 315/80/22.5 at each corner. Might even be able to swap front to rear with the right offset.
Just be sure to put them on a 9" wide wheel with proper offsets. Our bus came with 315/80's all the way around, but they were put on the stock 8.25" wheels. I might be able to get a pic later on - you can easily see where the sidewall lettering of the duals rubbed on each tire during sharp turns and the tread crown is too high. Bit of a no no on OTR rigs.

I officially decided to run super singles on both rear axles a while back and to not worry about front-to-rear swaps because we will be carrying spares regardless. Always liked a wider footprint anyway.

Our stock drive Rockwell is rated at 22k, so I'm making sure I match that fairly close with axle swaps and tire choice. The tag axle is not rated to hold the weight of the rear at all - only to supplement the drive axle. That'll get a major upgrade if we ever get ahold of the AxleTechs.
07-15-2019 02:32 PM
DE Jeeper They r michelin 315/80/22.5 xzus. Not sure what the speed ratings r but we have hauled for days staight over 70 and have gotten it almost 100. Not really worried because they r opperating at half the weight they can handle also the dual rating is 8270lbs.

Edit: The 455/55 say 75mph, my size says 65mph in the literature.

Yes they r not super singles, i was just stating our military take offs can handle heavy trucks.
07-15-2019 01:10 PM
bdkw1 But, but, those aren't super singles!

Although, I could get by with a single 315/80/22.5 at each corner. Might even be able to swap front to rear with the right offset.
07-15-2019 11:30 AM
JNHEscher
Quote:
Originally Posted by bdkw1 View Post
55 was the rating on most of the military tires I had looked at before. These buses can top out at 75. One of the biggest reasons I was going for the Michelin XDN2's is because I want an excellent ice and snow tread. XZL's don't look like the best for that, but I'll see what YouTube says.
07-15-2019 10:50 AM
bdkw1 https://www.michelinb2b.com/wps/b2bc...XZL_DataPg.pdf

Mostly 55MPH
07-15-2019 08:11 AM
JNHEscher
Quote:
Originally Posted by DE Jeeper View Post
Fyi military tires have big weight ratings. Our military freightshaker floats r rated at 10k each and 8800 as duals, each.
Whatcha running? I have to check the speed rating too.
07-14-2019 08:17 PM
DE Jeeper Fyi military tires have big weight ratings. Our military freightshaker floats r rated at 10k each and 8800 as duals, each.
07-14-2019 07:33 PM
JNHEscher
Quote:
Originally Posted by 350TacoZilla View Post
So what your saying is a set of 495\45r22.5's are in your future? They are widest I have ever seen for a on road type of tire. Sorry if I missed it but I'm guessing the bus is hub pilot 10 lug not lug pilot or "budd", if it was budd you could just run the military take offs in 335\80r20-395\85r20 for an aggressive all position tire.
495's are still available? Our bus is currently stud pilot that will be changed to hub pilot and I plan to run 455/45's. Off-road tread would be pretty sweet, though I don't think the military tires have the load capacity and probably aren't the best to run on the highway for long trips.
07-14-2019 01:38 PM
350TacoZilla
Quote:
Originally Posted by JNHEscher View Post
'Cause I like wide, dammit lol
So what your saying is a set of 495\45r22.5's are in your future? They are widest I have ever seen for a on road type of tire. Sorry if I missed it but I'm guessing the bus is hub pilot 10 lug not lug pilot or "budd", if it was budd you could just run the military take offs in 335\80r20-395\85r20 for an aggressive all position tire.
07-14-2019 07:12 AM
JNHEscher
Quote:
Originally Posted by 350TacoZilla View Post
What about middle of the road floats like a 385\65r22.5? They are close in height but bit narrower so only require a 12.75" wheel.
'Cause I like wide, dammit lol
07-13-2019 08:09 PM
350TacoZilla What about middle of the road floats like a 385\65r22.5? They are close in height but bit narrower so only require a 12.75" wheel.
07-13-2019 08:22 AM
87manche
Quote:
Originally Posted by JNHEscher View Post
LOL. I take it you guys have opened up yours enough to see how huge the tolerances are. All my CAD drawing measurements are certainly relative. Most of the bus is off by as much as 3/4" from side to side and top to bottom. Me thinks these were built with the base assembly in a jig and the rest of the pieces were eyeballed as the welders burned them in.
I know people that worked at flxible/ MCI for decades.

you're not wrong.
07-12-2019 03:40 AM
JNHEscher May the notching commence. Making way for the slider tubes. They'll be hugging the sides of the subframe. I hate to be trimming out all that stainless, but it was all attached in the same manner. A few stitch welds and some polyester sealer that has hardened and made way for moisture. Might as well mitigate any further oxidation of the main structure.

I also started cutting out this rusty rear channel. No idea what they're for other than collecting crud and water. They were loaded. Had to blow it out so that I could plasma cut without a bunch of arc blowback.
07-11-2019 08:58 PM
JNHEscher
Quote:
Originally Posted by FirstRam View Post
No, I think they'd be ashamed!
LOL. I take it you guys have opened up yours enough to see how huge the tolerances are. All my CAD drawing measurements are certainly relative. Most of the bus is off by as much as 3/4" from side to side and top to bottom. Me thinks these were built with the base assembly in a jig and the rest of the pieces were eyeballed as the welders burned them in.
07-11-2019 08:43 PM
FirstRam
Quote:
Originally Posted by JNHEscher View Post
MCI engineers would be shaking theirs heads at me right now, no?
No, I think they'd be ashamed!
07-11-2019 08:34 PM
JNHEscher
Quote:
Originally Posted by FirstRam View Post
3/32" clearance, why so loose? 5/57" would be .006 tighter, just like MCI designed everything else, why give yourself room to work now?

Blown away with every post, do you ever sleep?
I keep the boys and I close to my wife's overnight work schedule. No stranger to being awake for three days straight, though.

I keep thinking I should bump the clearance down to 1/16". Might wait until I get a proof to test. MCI engineers would be shaking theirs heads at me right now, no?
07-11-2019 07:53 PM
FirstRam 3/32" clearance, why so loose? 5/57" would be .006 tighter, just like MCI designed everything else, why give yourself room to work now?

Blown away with every post, do you ever sleep?
07-11-2019 06:21 PM
JNHEscher Transferred battery rack girdle dimensions over to SketchUp. Looks decent. I'll be welding some rod between the girdle plates so they're rigid and all will be wrapped in a padding of some kind so the batteries are snug but able to slide out when the tray is opened. So far, no complaints of my own. Just need to get a proof cut made so I can test fit prior to paying for the real deal. Throw your $0.02 at it if you like.
07-11-2019 03:43 AM
JNHEscher Fingered out a spot to trace the end profile. Blazor rade each plane onto gypsum board then measure distances to enter into Fusion. My caliper was too short so I had to use my tape measure that has a foot of 1/32" increments. Entered all dimensions and offset the perimeter for 3/32" clearance and template width of 7/16". Gonna send in a quote for four of these.
07-11-2019 12:04 AM
JNHEscher Feeling more content with this slider setup. 1" square slipped inside of 1.5" square. 1/16" strips of nylon to take up slack and maybe a smear of grease. I'll have to slot the 1.5" to make room for a "fin" on top of the 1". Debating on bolting the battery cradles to the 1" tubing to save from any weld warpage.

I'm going to try to trace the end profile of the Battle Born battery so that I can punch the shape into Fusion 360. Thinking of trying out one of those online cnc laser outfits I keep seeing. I could have them cut some rings that slip over the batteries to make the cradles with. Wanted to do this a while back but put it off to ponder other ideas.
07-10-2019 07:03 PM
JNHEscher
Quote:
Originally Posted by bdkw1 View Post
I am contemplating super singles for mine right meow.

Pro's,
work better off road
look bitchen

Con's
spares take up a lot of space
cost
ease of replacement on the side of the road
lack of redundancy in the rear
need different rim front to rear, no swapping front to rear (for me at least)

Feel free to chime in if I missed anything.
That's actually a pretty good chunk of it. Though I do drool over the wide tire look, the technical aspects make them much more attractive. I know most say they don't have room for spares, but I think you guys have seen how much space I have in the engine bay without the bathroom and air filter junk in the way. Of course I'd have to install a heat shield separator of sorts so I don't cook my tires back there. I'm not really afraid to hang them on some spare tire carriers off the back either.
07-10-2019 06:47 PM
bdkw1 I am contemplating super singles for mine right meow.

Pro's,
work better off road
look bitchen

Con's
spares take up a lot of space
cost
ease of replacement on the side of the road
lack of redundancy in the rear
need different rim front to rear, no swapping front to rear (for me at least)

Feel free to chime in if I missed anything.
07-10-2019 06:43 PM
JNHEscher
Quote:
Originally Posted by Pt_Ranger_V8 View Post
What are the arguments for/against super singles on a bus?

I mean, lower rolling resistance and better traction are always good - plus the load is pretty constant. I don't see any disadvantages to the idea.
I think a lot of it comes from fear of change. Best to find it all on the other forums so I don't fill another page or two with stuff that's already beaten to death online. We will be using 455/55-r22.5's on both rear axles and sticking with 315/80r22.5's on the front. I found those two sizes to be the closest match of rolling radii.
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