Eagle BBM RB 4340 Forged Crank 4.375 Stroke Arc Lighting Using an ear "cup" inside

Using an ear "cup" inside the helmet creates an air gap sound barrier that reduces outside noise

Flameproof Coating

Floor Jack Caster

fitting up to 4 in

Eagle BBM RB 4340 Forged Crank 4.375 Stroke Arc Lighting Using an ear "cup" insideEagle forged 4340 steel cranks feature a non twist forging, . 125" fillet radiuses for superior strength so chamfered narrowed bearings required, nitrided surface, &amp micropolished to &lt 2 ra. Intended for the most demanding applicationForged AISI ASME certified 4340 steel with multi stage heat treatment for superior strength Service: Eagle connecting rods and cranks are designed and manufactured to our specifications. Some simply purchase generic