My 1 ton has 17' split rims on the front axle. With 7.50x17 tires

I checked with Les Schwab tire store to find out if they were safe or not. They changed my tires without a hitch.

I have 18" duals on the rear axle. With 8.00x18 tires. So I have 2 spares.

When I got mu truck it also came with (4) 8 lug 16.5 tubeless rims which I have never tried on. I wanted to stay with duals.

Not sure of drum size.

Good Luck

GMCPic.

Dance like no one is watching,
Sing like no one is listening,
Love like you've never been hurt.

1948 GMC FC101 1/2t Pickup w/270 and SM420
1948 GMC FC253 1t Factory 80"x9' Flatbed Dually
1948 Chevy COE 2 Ton 8'x15' Flatbed
1950 GMC 354-24 2 Ton 8'X12' Flatbed w/Dump Hoist
1953 GMC 454-30 3 Ton 8'x14' Flatbed w/Dump Hoist
1953 GMC 454-30 3 Ton Cab and Chassis
1942 Clarkator 6 MILL-44 Heavy Aircraft Tug
1942 Ford (9N) Moto Tug with 1/2 yard Loader
1947 Oliver OC3 HG-42 Tract-Crawler Bull Dozier w/6' Blade