As your Castle Rock ST225/75R15 shows 80psi cold that is the pressure that you want to have for your 2021 Starcraft Super Lite 281BH. It sounds like you may have the Load Range E version of the Castle Rock ST225/75R15 Radial Trailer Tire # 274-000029 as our load range D only requires 65psi cold.
Be sure you are checking and filling the tires when they are cold as the air pressure in the tires will increase as they are driven and become warm. This is normal for tires to be filled when cold. view full answer...
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