Harley-Davidson FXLR Low Rider 107 Tail Light Bulb Size

The Harley-Davidson FXLR Low Rider 107 tail light uses a 3157 bulb size for this model. The replacement chart covers 2018 to 2020 production years with corresponding bulb specifications.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Bulb Size by Year Range

Years	US Type	EU Type	Shop
2018-2020	3157	P27/7W	Check Price

Bulb Specifications

Description	Type	Shop
ANSI standard (US & Canada). Dual-filament wedge bulb (T25). 12V, 27W/7W.	3157	Check Price

Other Locations

Additional Notes

The 3157 bulb is an ANSI-standardized type recognized across the United States and Canada, making it a widely available replacement in the North American market.
The Harley-Davidson FXLR Low Rider 107 uses the 3157 bulb for its tail light across the 2018-2020 model years.
The 3157 is a dual-filament bulb, meaning it serves two lighting functions within a single unit. In a tail light application, the lower wattage filament (7W) typically handles the running light function, while the higher wattage filament (27W) activates for braking.
The bulb operates on a 12-volt electrical system, which is standard for motorcycle applications of this type.
The T25 designation refers to the bulb's wedge-base form factor. This base type is press-fit rather than bayonet or screw-based, and fitment is specific to sockets designed for the T25 profile. Substituting a bulb with a different base type would be incompatible with the factory socket.