Rims and Tires, Tubes and Flaps


Getting real close to do tires on my truck, 1952 M35, going back to duals from single 11.00R20s'.

Couple questions on tube size and flap size. I haven't fully decided on going 9.00-20 or maybe stepping up to a 10.00-20. If I get 9.00-20 tubes, could I still use them in a 10.00-20 tire? I know there is a certain range, and most of the time is listed on the tube, for example, when I did some 7.50-16 tires, the tube was sized for a 7.00 to 8.25-16 tire. But haven't found much info on 9.00-20 tubes.

Second is the valve stem, what is the correct code? I'm seeing tubes with a TR444 stem(4-5" long, bent) and also for TR442(3-4" long, bent), I have 3 different lengths on the truck now(all between 3" and 5"). I know I want to stay on the longer side, the short one is difficult at best to even check pressure, let alone fill it. But I also don't want it too long.

Third is flaps, I have found 3 sizes, a 20-5", 20-7", 20-8", all center valve stems. What size does the stock rim take? I'm thinking the 20-7", but would like to know for sure.



Well-known member
Steel Soldiers Supporter
NORTH (Canada)
My recommendation is 11.00R20 or 12.00R20 dual or singles (as you prefer). The 9.00-20 are unnecessarily small. The tubes cover a few tire sizes.

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