Triumph Speedmaster front and rear turn signal bulbs utilize 232 and 5008 bulb sizes across the motorcycle's production span. The replacement chart documents bulb size specifications covering 2005 through 2016 model years.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The 5008 bulb is the most frequently specified size across both front and rear turn signal positions on the Triumph Speedmaster, appearing in the majority of model years from 2005-2016.
The 5008 is an ANSI-standard single-filament bulb with a BA15s bayonet base, rated at 12 volts, and is a lower wattage variant of the 1156 bulb type.
The 232 is an ANSI-standard festoon bulb with an SV8.5 base, rated at 12 volts and 3 watts.
The BA15s bayonet base of the 5008 and the SV8.5 base of the 232 are physically incompatible mounting types, meaning the two bulb sizes are not interchangeable with each other.
The Triumph Speedmaster front turn signal position alternates between the 232 and 5008 across certain model years, so the correct bulb size requires verification against the specific year rather than assuming consistency across the model line.
The 2012 Speedmaster is a notable case where the front and rear turn signals use different bulb sizes, with the 232 specified at the front and the 5008 at the rear.
The rear turn signal position uses the 5008 in all years except 2012, where the 232 is specified instead.