Harley-Davidson FLHXXX Street Glide Trike Brake Bulb Size

Harley-Davidson FLHXXX Street Glide Trike uses a 3157 bulb size for brake applications. The replacement chart covers 2010 to 2011 production years with corresponding bulb size 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	Bulb Size
2010-2011	3157

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Dual-filament wedge bulb (T25). 12V, 27W/7W.	3157

Other Locations

Additional Notes

The 3157 is an ANSI-standardized bulb type recognized across the United States and Canada, making it a widely available replacement in the North American market.
The Harley-Davidson FLHXXX Street Glide Trike uses the 3157 bulb for brake lighting across both the 2010-2011 model years.
The 3157 is a dual-filament bulb, meaning it contains two separate filaments within a single housing. One filament operates at 27W for the brake or turn signal function, while the other operates at 7W for the running light function.
The T25 designation refers to the bulb's wedge-type base form factor, which is a push-in fitting that does not require a twist to lock into the socket.
Operating voltage for the 3157 is rated at 12V, consistent with the standard electrical system voltage found in most production motorcycles and trikes.
Because the 3157 is a dual-filament type, substituting it with a single-filament equivalent would result in the loss of one lighting function, making filament count a critical factor in replacement selection.