6 3/4" 36-1 Trigger Wheel by DIYAutoTune Add a crankshaft position sensor to your engine with our laser cut 36-1 crank trigger wheel This trigger wheel is 6 3/4" in diameter and 1/8" thick, with a 1/2" diameter center hole Eight radial locating slots 1/4" wide teeth are 1/4" high, so this fits crankshaft pulleys up to 6 1/4" in diameter Balance hole for smooth balanced rotation We designed this wheel to fit most modern engines with average sized crank pulleys