Hello everyone, having an issue blowing tubes. I pull 4250-5500 4 mph top cut classes Old hard bfg's that bight really well. Tractor is Oliver 88, pushing 70 hp on dyno.I run 10.5-11.5 psi, tires don't wrinkle. Tire guy say's he feel's tires are moving just enough to break the valve stem's. Any ideas on what to Do. Thank's.
 
I pull 4250 to 5250. 6 8 and 10 mph. Have enough power to do this. Win some. Don't run that much psi. Have Cale Mahnke rims. Super lite. Just the bead of a old rim. No middle in rim. 18.4 tubes will not hold up. Have 20.8 tubes. Have to air tubes and let out a few times being sure tube is centered. Can't just fill with air like tubeless. Hope this helps Vic
 
Just a picture of rims
cvphoto127742.jpg
 
Hard to get good tubes these days. We try to get the Firestones that are made in the USA. Some are not. There are lots of different weights of tubes for the same sizes. I've been getting mine from here.
gallager tire
 
Talked to tire guy today. Going to try bead screw's every foot. Think's that will work. Probably work on them tomorrow. Thank's for everyone's input. Tractor pulling community is one of a kind!
 

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