Keep your spare tire road-ready with ADCO's Size J vinyl tire cover. Built to handle prolonged outdoor exposure, this cover blocks UV radiation and weather that degrade rubber over time -- so your spare is still reliable when you actually need it. Fits 27-inch diameter spare tires and installs without tools in seconds.
A spare tire left exposed to sunlight, rain, and road grime degrades faster than the tires actually rolling down the highway. UV rays crack the sidewall, ozone weakens the rubber compound, and dirt works into the tread. ADCO's spare tire covers are a straightforward fix -- heavy-duty vinyl shell, snug elastic fit, and reinforced construction that holds up season after season.
The Size J cover is sized for 27-inch diameter spare tires commonly found on Class A motorhomes, fifth wheels, and large travel trailers. The elasticized back panel conforms tightly to the tire, keeping the cover secure at highway speeds and in windy campsite conditions.
Heavy-duty vinyl outer surface resists ultraviolet degradation, preventing the cracking and fading that damage unprotected spare tires exposed to sunlight.
A hollow bead welt cord runs the perimeter and pairs with an elasticized back panel to deliver a snug, rattle-free fit that stays put while driving.
All seams are stitched with tear-resistant nylon thread, preventing seam separation that commonly causes cheaper covers to fail at the edges first.
Stretch the elasticized back over the tire and the bead cord locks it in place. No straps, no clips, no hardware -- on or off in under a minute.
Most RV spare tires ride on the back of the coach, underneath the chassis, or on a bumper carrier -- all locations with zero protection from the elements. UV exposure is the primary cause of sidewall cracking (also called ozone cracking or dry rot) in tires that sit stationary for extended periods. A quality cover extends usable tire life significantly, which is especially important for spare tires that may sit unused for years.
This is the Size J cover, designed for tires with an overall diameter of 27 inches. Measure your spare tire's total diameter before ordering -- do not rely on tire size codes alone, as the same nominal tire size from different manufacturers can vary slightly in overall diameter.
The outer shell is heavy-duty vinyl chosen for its balance of flexibility and UV resistance. The elasticized back panel is sewn in with a hollow bead welt cord at the perimeter -- this combination creates even tension around the tire face and prevents the cover from working loose. Seam reinforcement uses nylon thread rated for outdoor use.