Phil Wood produces eccentric bottom brackets from 4130 for use with standard chains or with standard chains using a half-link. The standard eccentric shell has a 2.142″ ID. The half-link shell has an ID of 1.840″. The eccentricity in the the standard body is greater than 0.5″, while the half-link has more than 0.25″ of eccentricity.
Our eccentric shells are compatible with both set screw and pinch bolt bottom bracket shells. Those shells that are compatible with pinch bolt clamping are supplied to builders in tube form without holes and a lateral cut.
In addition, Phil Wood manufacturers heat-sinks for frame builders to use with our eccentric shells.
Our relieved eccentric body.
Our half-link eccentric body.