Amazon.com: BUNKER INDUST Spare Tire Mount Bracket with Lock, Side Mount Utility Spare Tire Carrier for Trailer Tongue Boat, 4 & 5 Lugs Wheel Tire Holder up to 120LBS-Hold 3.94”, 4”, 4.25”
Pontoon Boat Spare Tire
Spare tire mount on an I-beam trailer - The Hull Truth - Boating and Fishing Forum
Trailer Spare Tire and Hub Carrier 5 Lug to Mount Trailer Tire and Wheel