Spare tires match main axle specs: ST205/75R15 Load Range C/D (10-ply) radial tires rated 1,820 lb @ 80 PSI on 15×6″ 5/6-lug steel wheels. Carry-On or etrailer A-frame carriers position spares forward of tongue jack, accessible without unloading wood/props.
10-ply construction handles 500+ mile interstate runs; UV/blackwall resists pellet dust fading. Inflate to 80 PSI cold; check monthly during competition season. Mount spares with same valve stem orientation as primaries for balanced rotation.