APC Props Sport 10x6 RC Aircraft Propeller - APC10060 Ring Gear Set or one of the other

or one of the other compatible models listed below and the factory caster blocks have given up

Traxxas Stampede 2WD (various versions — see parts list codes 24254-8

rattle-free body shell fitment

The Billing Boats Gun Carriage Set 4 (BIL04-BF-0164) is a wooden ship model fitting that adds authentic detail and rigging hardware to your wooden ship build

Appropriate screws or mounting hardware if originals are damaged (refer to your Ultima manual)

APC Props Sport 10x6 RC Aircraft Propeller - APC10060 Ring Gear Set or one of the otherThe APC Props 10060 Sport propeller is a 10x6 fixed pitch prop designed for sport and general purpose fixed wing RC aircraft running glow or electric power. The APC10060 measures 10 inches in diameter with a 6 inch pitch, making it a popular all round choice for trainer, sport, and low wing fixed wing models where balanced thrust and efficiency matter. APC propellers are manufactured to tight tolerances for consistent balance and reliable in flight