Add a crankshaft position sensor to your engine with our laser cut 36-1 crank trigger wheel. This trigger wheel is 8 1/4″ in diameter and 1/8″ thick, with a 1/2″ diameter center hole (with plenty of room to enlarge it for larger crank bolts). The teeth are 1/4″ high, so this fits crankshaft pulleys up to 7 3/4″ in diameter. It also has a balance hole in it for smooth rotation. We designed this wheel especially for older American engines, which often have very large crank pulleys.