Reducing tire pressure for bigger tires is correct in general. But there're other factors you may need to consider such as the maximum inflation pressure and load index on your bigger tires comparing to OE Toyo A23's 51 psi and 99 as both will affect the tire footprint. In other words you have to try different tire pressures to find out which one is the best for your needs. I use 39 psi cold on OE 225/55R19 99V tires for better even-wear. I suggest you to start with 36 psi cold and monitoring the tire wear and the performance you prefer then gradually add or reduce the tire pressure as desired.Gotcha, did not know that. So before I had the stock tires, 225/55/19, and now they are 245/50/19. The recommended PSI for stock tires were 36. Do you think lowering it to 35 would be fine?
Reducing tire pressure for bigger tires is correct in general. But there're other factors you may need to consider such as the maximum inflation pressure and load index on your bigger tires comparing to OE Toyo A23's 51 psi and 99 as both will affect the tire footprint. In other words you have to try different tire pressures to find out which one is the best for your needs. I use 39 psi cold on OE 225/55R19 99V tires for better even-wear. I suggest you to start with 36 psi cold and monitoring the tire wear and the performance you prefer then gradually add or reduce the tire pressure as desired.