The Triumph Speed Triple uses a 9003 bulb size for both high beam and low beam headlight applications. The replacement chart covers vehicle production spanning 1994 to 2023.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Triumph Speed Triple uses the 9003 bulb for both high beam and low beam headlight positions across all listed model years from 1994 to 2023, with the exception of 2019 and 2021, which are not present in the specifications.
The 9003 is a dual-filament halogen bulb, meaning a single bulb contains two separate filaments, one rated at 60W for high beam output and one at 55W for low beam output.
Because both the high beam and low beam positions on the Speed Triple share the same 9003 specification, a single bulb type serves both lighting functions within one housing unit.
The 9003 bulb operates on a 12V electrical system, which is standard for motorcycle applications of this type.
The 9003 uses a P43t base, a bayonet-style mount with a 43mm flange, which physically determines fitment and is not interchangeable with bulbs carrying different base types even if wattage ratings are similar.
The 9003 designation follows the ANSI standard used in the United States and Canada. In European markets, the functionally equivalent bulb is designated H4, sharing the same dual-filament design and P43t base, though labeling differs by region.
The consistent use of the 9003 across all listed years from 1994 to 2023 means replacement bulbs sourced for any one of those model years are physically and electrically compatible with the others, provided the base type and voltage rating match.