GBC website says 910 lbs per tire at 20 psi. That would be about 2 times the weight of your talon so for general riding I would start around 10 psi and go from there.
If you have beadlocks, you should drop to 5-6 psi for rock crawling or sand dunes. If no beadlocks, I would not go lower than 8.
If you have beadlocks, you should drop to 5-6 psi for rock crawling or sand dunes. If no beadlocks, I would not go lower than 8.