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Tandem

Heavy or wide patio doors often use tandem (dual-wheel) rollers that split the load across two wheels. Clean the track first and skip WD-40. Grit will wear two wheels as fast as one. Match the tab style below, or confirm fit in the Roller Finder. Need a refresher? See how to measure the wheel. Tandem and dual wheel rollers are engineered for performance under load. Rather than concentrating a door’s full weight on a single axle, two wheels sit side-by-side on a pivoting cassette that continuously self-levels as the panel travels the track. The load is split evenly between both wheels, which dramatically reduces wear per wheel and extends service life compared to a single wheel assembly carrying the same weight. The pivoting cassette also tolerates minor track imperfections such as grit, small dents, and slight misalignment that would cause a single wheel to skip, chatter, or gouge the track. The result is a smoother, quieter glide and long-term alignment stability that keeps multipoint lock systems engaging correctly every time. Tandem rollers are the right choice whenever a panel is large or heavy (particularly tempered or laminated glass), hurricane-rated, or subject to the higher cycle counts of commercial spaces. They are the go-to for professional installers on any premium replacement job, and for homeowners who want to upgrade from a single wheel assembly that has been struggling with a heavier door.

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