Overdose ES Alum. Knuckle - RedOverdose (#OD2895) ES Alum. Knuckle Red Feature: For: Overdose GALM Series; Universal Parts Introducing the ES Aluminum Knuckle. In response to requests for commercialization of recent trends, Overdose has designed 1 degree kingpin angle and 0mm trail for less affected by the road surface and tyres on driving. The scrub radius is set 1mm larger than standard, realizing moderate quickness and easy control at deep angle drifting. The weight is only 2.