Right tire for drw 96 Cheyenne k3500

[Angelo]

I have 215 85 16 tires on it. That's what was on it when I bought this ambulance, the old tires were from 2005 and I replaced a couple years ago. Need to replace at least the rear 4 now, they're showing uneven wear.
When doing research on a tire I found on marketplace I input my vehicle details on cooper tires website and they say I need a different tire -

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If I put 4x4 instead of DRW on americastire.com it gives me 245/75/16. It's a 4x4 DRW. Any opinions? Would it be ok to put 225/75/16 tires in the rear axle and leave the fronts as 215/85/16?
All websites say this is the right tire for a drw cheyenne

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Maybe it's not a good idea with heavy weight, being that the duallys are already so close to each other.

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[Sean Buick 76]

No don’t go oversized.

 

[Schurkey]

What does the owner's manual or door-sticker show for tire size?

 

[Nad_Yvalhosert]

Usually, unless special ordered:

SRW gets the 245 75 16
DRW pickup gets the 225 75 16
DRW chassis cab gets 215 85 16

Your former ambulance has the correct tire. Stay with the 215 85s on all 6.

 

[BNielsen]

You can run wider but you'll need a spacer; I think @88GMCtruck, @83GMCK2500, and @skylark are running over sized tires with 255s and 265s.
I know when my K3500 gets converted to a dually I'm going to run 255/85R16s, I think those need at least a 1.75 inch spacer

 

[skylark]

You can run wider but you'll need a spacer; I think @88GMCtruck, @83GMCK2500, and @skylark are running over sized tires with 255s and 265s.
I know when my K3500 gets converted to a dually I'm going to run 255/85R16s, I think those need at least a 1.75 inch spacer

I ran a 2.5 with 265/75/16s. Those tires look really wide for 215s most guys get away with 235s but they have to be fully inflated or else they'll touch. Are yours inflated decently?

 

[Angelo]

Thanks guys(and girls). Well actually interestingly enough @Schurkey and @Nad_Yvalhosert it says 225 75 16 on the door jam. Weird huh? I'm gonna stick with the same size I have on here though. I found some nice 215/85/16 today for the rear axle.

You can run wider but you'll need a spacer; I think @88GMCtruck, @83GMCK2500, and @skylark are running over sized tires with 255s and 265s.
I know when my K3500 gets converted to a dually I'm going to run 255/85R16s, I think those need at least a 1.75 inch spacer

Ever consider super singles?

 

[Schurkey]

Going from 215 to 225 would likely be do-able...IF they're inflated properly, and IF the vehicle isn't overloaded which flexes the sidewalls more.

The overloading may be a problem here.