Store › NOS - Lucas Heater Fan Knob - TR5 TR250 TR6 - 54326157 Image 1 of 3 Image 2 of 3 Image 3 of 3 NOS - Lucas Heater Fan Knob - TR5 TR250 TR6 - 54326157 $20.00 New old stock Lucas heater fan knob. Fits Triumph TR5, TR250, TR6 and many others. SKU 3300 Add To Cart Added! New old stock Lucas heater fan knob. Fits Triumph TR5, TR250, TR6 and many others. SKU 3300