Suzuki Motorcycle LT-F250 QuadRunner Tail Light Bulb Size

The Suzuki Motorcycle LT-F250 QuadRunner tail light requires a 12821 bulb size for proper illumination and function. Available information covers a specific range of production from 1988 through 2002.

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 Type	Shop
1988-2002	12821	Check Price

Bulb Specifications

Description	Type	Shop
Philips part number. Miniature wedge bulb (T10) with W2.1x9.5d base. 12V, 5W.	12821	Check Price

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Additional Notes

The Suzuki LT-F250 QuadRunner uses the 12821 bulb for its tail light across all listed model years from 1988 to 2002, reflecting an uninterrupted fitment specification throughout that entire production span.
The 12821 is a Philips part number designating a miniature wedge bulb in the T10 form factor, which refers to a tubular bulb roughly 10mm in width.
The bulb operates on a 12-volt electrical system and draws 5 watts, placing it in the low-wattage range typical of tail and marker lighting applications.
The W2.1x9.5d base type is a wedge-style connector, meaning the bulb is held in its socket by the tension of the base itself rather than by a bayonet or screw mechanism.
The W2.1x9.5d designation specifies a base width of 2.1mm and a pin spread of 9.5mm, which are the governing factors for physical socket compatibility.
Because the T10 wedge format is widely used across many vehicle and equipment types, substitutions from other manufacturers are possible provided the voltage, wattage, and W2.1x9.5d base geometry match exactly.