Description A light-weight and balanced 100mm diameter (Aprox 4″) 36-1 trigger wheel laser cut from 5mm steel compatible with nearly all standalone engine management systems. Including: DTA Omex Adaptronic Emerald Haltech Megasquirt Megajolt Autronic Ford EDIS Link Motec The wheels are made with great accuracy and are plated against corrosion. Center mounting bore is 12mm. They have 8mm wide slots for adjustable mounting (slots are at 68mm diameter), or they can be mounted via the 12mm hole in the center. They are considerably lighter than a sold wheel, weighing aprox 400 grams! They are also balanced to compensate for the missing tooth. Suitable for Ford EDIS systems too. (logo visable on one side only)