The Triumph Thruxton uses 5008 and 232 bulb sizes for front turn signal applications, with 232 and 5008 sizes specified for rear turn signal positions. The replacement chart covers 2004 through 2016 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.
The Triumph Thruxton turn signal specifications cover model years 2004-2016, with two distinct bulb types appearing across both front and rear positions: the 5008 and the 232.
The 5008 is the more frequently specified bulb across the Thruxton's turn signal positions. It is a single-filament bulb with a BA15s bayonet base, rated at 12V, and is classified as a lower wattage variant of the 1156 under the ANSI standard applicable in the US and Canada.
The 232 is a festoon bulb with an SV8.5 base, rated at 12V and 3W, also conforming to the ANSI standard for the US and Canada. Its festoon form factor differs fundamentally from the BA15s bayonet mount of the 5008, making the two types physically incompatible with each other.
Because the 5008 uses a bayonet base and the 232 uses a festoon base, neither bulb is interchangeable with the other regardless of voltage compatibility.
The front turn signal position on the Triumph Thruxton uses the 5008 for most model years, with the 232 specified for 2004 and 2009.
The rear turn signal position shows greater variation between the two bulb types across the production span, with the 232 specified for 2005, 2007, 2014, and 2016, and the 5008 specified for the remaining years.
A given model year does not necessarily use the same bulb type in both the front and rear turn signal positions, meaning the front and rear positions must be referenced independently when sourcing replacements.