The Stovebolt Site Forums The Parking Lot Big Bolts Tire size and wheel cylinders

Hey guys I did end up finding me a set of tubeless wheels for the back of my 56 4400. The wheels have some nice ancient tires that I would like to do some replacing on. They have 9r 22.5s now but those aren’t exactly in high supply (used). I am needing to see if anyone has ran 10s or 11s on the back or if it can be done. These will just be for the rear duals. I have good 9rs on the front.

Also, front wheel cylinders. I need to find where y’all acquire those. It’s a 7/8 or 1 inch bore. I see some on the internet that look similar but you can never be too sure.

Hy BigBoltJohn, as has been previously discussed here, the original 7/8" front wheel cylinders with the hose connection straight out of the back are no longer available. You could have your original wheel cylinders sleeved, or as I suggested years ago, use the wheel cylinders designed for the 1960-66 50 series they are also 7/8" bore and are the same in all respects except the hose connection port is at an angle. Other people here have made the conversion. The Napa p/ns are UP19090 and UP19091, the Raybestos p/ns are WC19090 and WC19091, hope that helps.

I think I will go with the 60-66 wheel cylinders as I had just recently purchased the brake lines from napa for the same truck but they worked great. Thank you!

Hi BigBoltJohn, my truck is a '57 2 ton, 22.5" tubeless, I'm running 10R 22.5 duals on the original wheels, it's 15 foot grain box and the tires clear ok.