Info needed: 9.00-16 tube stem size?

[rob love]

One problem you may run into as well is that most of the tubes available these days are valve off center. The CMPs, along with the M series deuces and dodges use valve on center. You will also want a re-enforced valve on center flap so the inner tube doesn't work it's way through the slot and blow.

The local tire shop here did the museums tires before I came, and they were using the valve off center and dragging the valves over. Some would fail in the first month, others worked until their first long drive. I think I have replaced almost all of them now, although they also welded the split rims on some of them to make them "safe", so most of those I have to scrap.

I bought some from Wallace Wade at the MVPA convention years back, and tracing backwards, later, from his part numbers I found the supplier in the US. They were happy to ship in quantity, and at favorable prices.

While they are made in China, they have worked out well for me. The part number for the 825/900R16LT tubes is 11021, and they have the TR440 valve. The flaps are part number 99012 and have the heavy re-enforced area around the stem. The distributor is Doberman. http://www.dobermanntire.com/our_pro...17&subcatid=25

Regarding using them in a larger tire...my money says you would likely be OK. Are they for highway use or just casual use?

[Bob Phillips]

Hi Rob,
My purpose is to build a road vehicle ( to whatever extent a cmp can be considered a road truck). I have used the larger tires in the past with smaller tubes but they were heavy duty, heavy rubber tub es. At this point I will pull apart some more old wheels and try to come up with a good set of 4 heavy rubber tubes, by the way do you (or does anyone) still use replacement valve stems É I remember when the tire shop would burn melt them onto the tube when the old valve stem had failed.
BP

[rob love]

When I checked with my tire shop, it turns out a valve assembly that you vulcanize onto a tube will cost more than the complete tube. I was hoping to modify the available valve off center tubes to valve on center. The thought of $50 innertubes ended that. I think we paid about $16 a tube (USD) for the ones from Doberman. While I am by no means afraid to patch inner tubes, and do frequently when the leak is obvious, it is the slow leaks that take up too much of my time.

[Mike K]

Somebody pointed out to me years ago: its not good practice to have the valve stems protruding out beyond the rim edge, the stem can easily be broken off by hitting any passing object. Or even hit a bystander or other vehicle.

We were standing around looking at a club members F15A and John Bruce made the comment "that's bloody dangerous" the valve stems were protruding way beyond the rim edge

[rob love]

I've always heard that about the valve stems, but after 40 years am just about ready to file it under old wives tale. A lot of the Jeep tires had valve stems that extended a bit beyond the rim......never had to repair one for that reason. As to hitting bystanders, if they are close enough to be hit by the valve stems, then they are close enough to get hit by the fenders or the bumper.

[Lynn Eades]

Back in the day (when ever that was) the old tubes were rubber and they would stretch for miles. They were great tubes. Now they stretch and stay stretched. I'm not sure how far they can go.

[Jordan Baker]

Thanks for all the quick help.

Rob I got in touch with Dobermann Tire. Very easy to deal with and the tubes are on the way. Their price is awesome too