M920 wheel and tire help

[Altman63y]

Our volunteer fire department has a m920 that we use to haul water it currently has 11.00r24 on it most of the tires are all dry rotted and cracked we have not been able to find and replacement tires either. Had a tire supplier send us some new tires and rims not sure of the tire size but the rims are 22.5 when trying to install them they hit on the drums. Now I've seen in some other threads that some people have ground the drums down for them to fit does anyone have any pics or tips before I start grinding on the drums

 

[NDT]

Tell your supplier you need common 24.5 rims not 22.5. That grinding rim process was so private owners could use HEMMT rims on the front axle, and should not be done on a government owned vehicle.

 

[simp5782]

You need 11r or 12r 24.5s

Aelous makes a cheap 12r24.5 that will keep about the same road speed as 11r24

If you need some cheap 11R24s I have 10 or so in Memphis that are high tread and not rotted.

Also some new ones on wheels that are old but never used.

 

[NDT]

Wes are the tires you have Good Year or Michelin? I need a few Good Years myself.

 

[Altman63y]

Tell your supplier you need common 24.5 rims not 22.5. That grinding rim process was so private owners could use HEMMT rims on the front axle, and should not be done on a government owned vehicle.

Tell your supplier you need common 24.5 rims not 22.5. That grinding rim process was so private owners could use HEMMT rims on the front axle, and should not be done on a government owned vehicle.

I kinda of had that thought but I'm not familiar with lug patterns and tire sizes so wasnt really sure what would fit the guy that was heading up getting tires for just kinda quit after the 22.5's didn't clear and after having a flat a block from the station yesterday I was just trying to find the fastest way to get it on the road we are very rural and count on that truck to refill all the fire trucks during fires

 

[Altman63y]

You need 11r or 12r 24.5s

Aelous makes a cheap 12r24.5 that will keep about the same road speed as 11r24

If you need some cheap 11R24s I have 10 or so in Memphis that are high tread and not rotted.

Also some new ones on wheels that are old but never used.

Out of the 11r24.5 and 12r24.5 which will be the closest to the 11r24

 

[NDT]

Those 24.5's are very common on log trucks and vacuum trucks. The 22.5s are used on highway trucks. Both sizes use "10 hole Budd" pattern, stud centered.

 

[Altman63y]

Thanks for the help I'll see what I can get done tomorrow

 

[simp5782]

Out of the 11r24.5 and 12r24.5 which will be the closest to the 11r24

12r24.5s are 46in tall. Equal to 11R24 or 395 85R20

11R24.5s are 43in tall

 

[BEASTMASTER]

if I were you I'd find another tire guy. this guy should NOT be downsizing you're rims and tires on a truck that size !!!!!!! he doesn't sound too smart to me .

 

[Floridianson]

Mk48 wheels fit the drums on those bigger drums. I did not like cutting into the drum to make other wheels fit. I did it but switched the drums out when I got the correct wheels.

 

[simp5782]

Yes. I forgot that they will fit.

Have a few set of the tires and wheels if the op is interested

 

[NDT]

Guys I would not recommend goofy MK48 tires/rims to fire departments. They need tires they can find and have repaired at local truck tire shops.

 

[simp5782]

About as cheap as 12R24.5s run. Found sold by Walmart as well. There are a few recaps on ebay.

Maybe some casings and have them capped but they aren't easy to find either

 

[Floridianson]

Guys I would not recommend goofy MK48 tires/rims to fire departments. They need tires they can find and have repaired at local truck tire shops.

Just saying there wheels fit the drums as I hated to cut a groove in the drums to make other wheels fit. Correct wheel is correct wheel.

 

[simp5782]

I will bump this as I found 12.00R24s from a tire shop called gateway for $375 tire,tube,flap installed per tire. That includes excise tax, which we all hate, it is a 22ply tire. So it does give a 6 to 8mph speed increase over the 11.00r24s

11.00r24s were $345 ea

 

[NEIOWA]

DOD still using 24" anywhere else? I don't think so. Our M911 but are 14.00x24" so certainly obsolete.

Get the NSN for the tires to your state fed surplus. They may be able to get thru DOD surplus though I doubt any M920 (thus tires) are still in active use by DOD. If can find the tires in RCP status then DOD will pay the frt to you. I've gotten new tires for our M916A3 tanker this route.

Or you can purchase direct off of the DOD contract thru GSA (may or may not be price advantage).